[Event "EU-Cup 38th"]
[Site "Durres"]
[Date "2023.10.06"]
[Round "6.4"]
[White "De Jong, Jan Willem"]
[Black "Ondersteijn, Niels"]
[Result "1/2-1/2"]
[ECO "E62"]
[WhiteElo "2412"]
[BlackElo "2370"]
[PlyCount "169"]
[EventDate "2023.10.01"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "ALB"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Paul Keres"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. c4 Nf6 2. Nc3 g6 3. Nf3 Bg7 4. g3 0-0 5. Bg2 d6 6. d4 Nc6 7. 0-0 e5 8. dxe5 Nxe5 9. Nxe5 dxe5 10. Qxd8 Rxd8 11. Bg5 Rd7 12. h3 c6 13. b3 h6 14. Be3 Bf8 15. Na4 Kg7 16. Rad1 Rxd1 17. Rxd1 Nd7 18. f4 exf4 19. Bd4+ Kg8 20. gxf4 Be7 21. e3 Kf8 22. Kf2 Ke8 23. e4 Nf8 24. Bc5 Ne6 25. Bxe7 Kxe7 26. Ke3 g5 27. f5 Nf4 28. Bf3 Rb8 29. h4 b5 30. cxb5 Rxb5 31. hxg5 hxg5 32. Bg4 f6 33. Rc1 Re5 34. Rh1 Ng2+ 35. Kd4 Nh4 36. Nc5 Kd6 37. b4 a5 38. a3 Re7 39. Rb1 axb4 40. Rxb4 Re5 41. Rc4 Nxf5+ 42. Bxf5 Bxf5 43. Nb7+ Kc7 44. Nc5 Bc8 45. Rc1 Kd6 46. Nd3 Ra5 47. Rc3 Ra4+ 48. Ke3 Ra5 49. Kd4 Ra4+ 50. Ke3 f5 51. exf5 Bxf5 52. Nc5 Rh4 53. Kf2 Rh2+ 54. Kg1 Rc2 55. Nb7+ Kc7 56. Rf3 Be6 57. Re3 Kxb7 58. Rxe6 Kb6 59. Kf1 Kb5 60. Re5+ Rc5 61. Re4 Rd5 62. Ke2 c5 63. a4+ Kb6 64. Ke3 Rd1 65. Rg4 Rd5 66. Re4 Rd6 67. Re5 g4 68. Rg5 Rd4 69. a5+ Kb5 70. a6 Ra4 71. Kd3 g3 72. Kc2 g2 73. Kb2 Rb4+ 74. Kc2 Kxa6 75. Rxg2 Kb5 76. Rg3 Rc4+ 77. Kb3 Ra4 78. Rh3 Rb4+ 79. Kc3 Ka4 80. Rh8 Rg4 81. Rb8 Rb4 82. Ra8+ Kb5 83. Rb8+ Kc6 84. Rxb4 cxb4+ 85. Kxb4 1/2-1/2

[Event "EU-Cup 38th"]
[Site "Durres"]
[Date "2023.10.04"]
[Round "4.5"]
[White "Samadov, Read"]
[Black "Ondersteijn, Niels"]
[Result "1/2-1/2"]
[ECO "E04"]
[WhiteElo "2492"]
[BlackElo "2370"]
[PlyCount "137"]
[EventDate "2023.10.01"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "ALB"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]
[WhiteTeam "Vugar Gashimov"]
[BlackTeam "Paul Keres"]
[WhiteTeamCountry "AZE"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 dxc4 5. Bg2 c5 6. 0-0 Nc6 7. Qa4 Bd7 8. Qxc4 b5 9. Qc3 b4 10. Qd3 Rc8 11. dxc5 Bxc5 12. Be3 Bxe3 13. Qxe3 Qb6 14. Qxb6 axb6 15. Nbd2 Na5 16. Rfc1 Ke7 17. Nd4 Rxc1+ 18. Rxc1 e5 19. N4f3 Nc6 20. e3 Rc8 21. Ne1 Rd8 22. Nc4 b5 23. Bxc6 Bxc6 24. Nxe5 Bd5 25. N5d3 b3 26. axb3 Bxb3 27. f3 Bc4 28. Rd1 g5 29. g4 h5 30. h3 hxg4 31. hxg4 Ne8 32. Nf2 Rxd1 33. Nxd1 Kd6 34. Nc3 Kc5 35. Ne4+ Kb4 36. Nd2 Nd6 37. Kf2 f5 38. gxf5 Nxf5 39. e4 Nd4 40. Ke3 Nc6 41. Nc2+ Kc5 42. Nb1 Bb3 43. Ne1 Bc4 44. Nd2 Ne5 45. Nc2 Nc6 46. b3 Bf7 47. Kd3 b4 48. Ke3 Bg8 49. Ne1 Na5 50. Nd3+ Kb5 51. Nc1 Kc5 52. e5 Kd5 53. Nd3 Bh7 54. Nxb4+ Kxe5 55. Na6 Bg8 56. Nc5 Nc6 57. Nd3+ Kf5 58. b4 Bd5 59. Ne4 g4 60. Ng3+ Kf6 61. f4 Bc4 62. Ne4+ Ke6 63. Nec5+ Kf5 64. Kf2 Bxd3 65. Nxd3 Nxb4 66. Nxb4 Kxf4 67. Nd3+ Ke4 68. Kg3 Kxd3 69. Kxg4 1/2-1/2

[Event "EU-Cup 38th"]
[Site "Durres"]
[Date "2023.10.02"]
[Round "2.5"]
[White "Santos Latasa, Jaime"]
[Black "Ondersteijn, Niels"]
[Result "1-0"]
[ECO "B36"]
[WhiteElo "2650"]
[BlackElo "2370"]
[PlyCount "139"]
[EventDate "2023.10.01"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "ALB"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]
[WhiteTeam "Turkish Airlines"]
[BlackTeam "Paul Keres"]
[WhiteTeamCountry "TUR"]
[BlackTeamCountry "NED"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Nc6 5. c4 Nf6 6. Nc3 d6 7. Be2 Nxd4 8. Qxd4 Bg7 9. 0-0 0-0 10. Qd3 Be6 11. Be3 Qa5 12. f4 Rfc8 13. b3 a6 14. Bd4 b5 15. cxb5 axb5 16. Nxb5 Qb4 17. e5 Bf5 18. Qd1 dxe5 19. a3 Bc2 20. axb4 Bxd1 21. Raxd1 exd4 22. Nxd4 Nd5 23. Bf3 e6 24. Bxd5 exd5 25. Nb5 d4 26. Nxd4 Ra2 27. f5 Bxd4+ 28. Rxd4 Rcc2 29. Rg4 Rab2 30. Rg3 Re2 31. h4 Kg7 32. Rf4 Re5 33. Kh2 Kh6 34. fxg6 fxg6 35. Rc4 Rbe2 36. Rf3 Re7 37. Kh3 Kg7 38. b5 Rb7 39. b4 Re5 40. b6 Rxb6 41. Rc7+ Kg8 42. Rff7 h5 43. Rfd7 Kf8 44. Rh7 Kg8 45. Rcg7+ Kf8 46. Ra7 Kg8 47. Rhb7 Rxb7 48. Rxb7 Re3+ 49. Kh2 Re4 50. Kg3 Kf8 51. b5 Ke8 52. b6 Kd8 53. Rg7 Rg4+ 54. Kf3 Kc8 55. g3 Kb8 56. Kf2 Kc8 57. Kg2 Kb8 58. Kf3 Kc8 59. Kf2 Kb8 60. Rf7 Rb4 61. Rf6 g5 62. hxg5 Rg4 63. Rf5 Kb7 64. Rb5 Ra4 65. Kg2 Rc4 66. g6 Rg4 67. Rxh5 Rxg6 68. Rb5 Rg8 69. Rb4 Kc6 70. b7 1-0

[Event "NED-chT 2324"]
[Site "Netherlands"]
[Date "2023.09.16"]
[Round "1.8"]
[White "Konijn, Rob"]
[Black "Ondersteijn, Niels"]
[Result "1-0"]
[ECO "B09"]
[WhiteElo "2092"]
[BlackElo "2378"]
[PlyCount "119"]
[EventDate "2023.09.16"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]
[WhiteTeam "De Waagtoren"]
[BlackTeam "Paul Keres"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 0-0 6. Be3 b6 7. Bd3 c5 8. dxc5 bxc5 9. e5 Ng4 10. Bg1 Nc6 11. Be4 Qb6 12. h3 Nh6 13. Qd2 Rd8 14. 0-0-0 Rb8 15. b3 Nf5 16. Na4 Qc7 17. Bxc6 Qxc6 18. Bxc5 Ng3 19. Rhe1 Ne4 20. Qa5 Bb7 21. Nd4 Qc8 22. Bxa7 Ra8 23. Nb6 Rxa7 24. Qxa7 Qc3 25. Kb1 Nd2+ 26. Kc1 dxe5 27. Na4 Qc7 28. Nb5 Qd7 29. Qa5 Ra8 30. Rxd2 Rxa5 31. Rxd7 Rxb5 32. c4 Rb4 33. Nc5 Bc6 34. Rc7 Rb6 35. fxe5 Bh6+ 36. Kc2 Bxg2 37. a4 Bxh3 38. Rxe7 Bf8 39. Re8 Kg7 40. Nd3 Bf5 41. Rd1 h5 42. Kc3 h4 43. c5 Ra6 44. Kc4 h3 45. Kb5 Ra7 46. c6 h2 47. Nf2 Be7 48. Kb6 Bg5 49. Kxa7 Be3+ 50. Kb8 Bxf2 51. Rh1 Bg3 52. c7 g5 53. a5 f6 54. a6 Kf7 55. a7 Kxe8 56. a8Q Bxe5 57. Qc6+ Bd7 58. Qd5 g4 59. Kb7 g3 60. c8Q+ 1-0

[Event "Bruges Masters op"]
[Site "Bruges"]
[Date "2023.08.18"]
[Round "9"]
[White "Ondersteijn, Niels"]
[Black "Dauw, Sterre"]
[Result "1-0"]
[ECO "B23"]
[WhiteElo "2375"]
[BlackElo "2215"]
[PlyCount "123"]
[EventDate "2023.08.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BEL"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 a6 3. g3 b5 4. Bg2 Bb7 5. d3 e6 6. f4 d5 7. f5 exf5 8. Nxd5 Nf6 9. Nxf6+ Qxf6 10. Nh3 fxe4 11. Ng5 e3 12. Rf1 Qxg5 13. Bxb7 Ra7 14. Qf3 Qe7 15. Bd5 g6 16. Qf4 Nd7 17. Qxf7+ Kd8 18. Qxe7+ Bxe7 19. Bxe3 Nf6 20. Bf3 Rd7 21. 0-0-0 Nd5 22. Bd2 Rf8 23. Rde1 Rd6 24. Bg2 Rxf1 25. Rxf1 Ke8 26. a3 Bf8 27. Re1+ Kd7 28. Re5 Nb6 29. Bg5 h6 30. Be3 Rf6 31. Bh3+ Kc7 32. Re6 Rxe6 33. Bxe6 Kd6 34. Bf7 Nd5 35. Bf2 g5 36. Bh5 Bg7 37. Bf3 a5 38. Be2 Bd4 39. Be1 b4 40. axb4 axb4 41. Bf3 Be5 42. Bxd5 Kxd5 43. h3 c4 44. dxc4+ Kxc4 45. b3+ Kd4 46. Kd2 Ke4 47. Ke2 Bd6 48. g4 Kf4 49. c3 bxc3 50. Bxc3 Kg3 51. b4 Kxh3 52. Kf3 h5 53. gxh5 g4+ 54. Ke4 Bf8 55. Kf5 g3 56. Bd4 g2 57. b5 Kg3 58. b6 Kf3 59. b7 Bd6 60. h6 Bf4 61. h7 Be3 62. Bxe3 1-0

[Event "Bruges Masters op"]
[Site "Bruges"]
[Date "2023.08.17"]
[Round "8"]
[White "Muetsch, Annmarie"]
[Black "Ondersteijn, Niels"]
[Result "1/2-1/2"]
[ECO "B36"]
[WhiteElo "2203"]
[BlackElo "2375"]
[PlyCount "120"]
[EventDate "2023.08.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BEL"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. c4 Nc6 4. d4 cxd4 5. Nxd4 Nf6 6. Nc3 d6 7. Be2 Nxd4 8. Qxd4 Bg7 9. Be3 0-0 10. Qd2 a5 11. 0-0 a4 12. Rac1 Qa5 13. f3 Be6 14. Nd5 Qxd2 15. Bxd2 Bxd5 16. cxd5 Nd7 17. Rc2 Nc5 18. Be3 h5 19. g3 Kh7 20. Kg2 b6 21. Bb5 Rfb8 22. Bc6 Ra7 23. Bb5 Ra5 24. Be2 Rc8 25. Bd2 Raa8 26. Be3 Bh6 27. Bxc5 bxc5 28. f4 Bg7 29. Bc4 Rcb8 30. b3 Rb4 31. e5 Kg8 32. Re2 axb3 33. axb3 Rb7 34. Rfe1 Rba7 35. Rf2 Ra1 36. Rxa1 Rxa1 37. Re2 Bh6 38. h4 Bg7 39. Kf2 Rh1 40. Kg2 Rd1 41. Kf2 Rc1 42. Kg2 Rc3 43. Kf2 Bf8 44. Kg2 Rc1 45. Kf2 Ra1 46. Kg2 f6 47. exd6 exd6 48. f5 Kf7 49. Bb5 gxf5 50. Be8+ Kg8 51. Bxh5 Rd1 52. Bf3 Rd3 53. Rb2 Bh6 54. Be2 Re3 55. Bc4 f4 56. gxf4 Bxf4 57. Rf2 Rg3+ 58. Kf1 Rg4 59. Rg2 Bg3 60. Ke2 Rg7 1/2-1/2

[Event "Bruges Masters op"]
[Site "Bruges"]
[Date "2023.08.16"]
[Round "7"]
[White "Ondersteijn, Niels"]
[Black "Bogner, Sebastian"]
[Result "1/2-1/2"]
[ECO "D38"]
[WhiteElo "2375"]
[BlackElo "2537"]
[PlyCount "89"]
[EventDate "2023.08.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BEL"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. cxd5 exd5 6. Bg5 h6 7. Bh4 0-0 8. e3 Bf5 9. Be2 Nbd7 10. Nd2 c6 11. Qb3 Qb6 12. 0-0 Bd6 13. Rfc1 Rfb8 14. Bg3 Bxg3 15. hxg3 Qd8 16. Na4 h5 17. Nc5 Nxc5 18. dxc5 b6 19. Qa3 Bg4 20. Bd3 Nd7 21. cxb6 axb6 22. Qd6 Nc5 23. Qxd8+ Rxd8 24. Bc2 Na6 25. a3 c5 26. Bd1 b5 27. Bxg4 hxg4 28. Nb3 Rac8 29. Rc2 d4 30. exd4 c4 31. Nc5 Nxc5 32. dxc5 Rxc5 33. b3 Rd4 34. Rac1 Kf8 35. bxc4 Rcxc4 36. Rxc4 bxc4 37. Kf1 Ke7 38. Ke2 Re4+ 39. Kd2 Kd6 40. Kc3 Kc5 41. Rh1 f5 42. Rh8 Re2 43. Rc8+ Kd5 44. Rd8+ Kc5 45. Rc8+ 1/2-1/2

[Event "Bruges Masters op"]
[Site "Bruges"]
[Date "2023.08.15"]
[Round "5"]
[White "Ondersteijn, Niels"]
[Black "Ohler, Julius"]
[Result "1-0"]
[ECO "E11"]
[WhiteElo "2375"]
[BlackElo "2141"]
[PlyCount "121"]
[EventDate "2023.08.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BEL"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 Qe7 5. e3 0-0 6. Bd3 Bxd2+ 7. Qxd2 d6 8. Nc3 Nc6 9. 0-0-0 e5 10. Nd5 Nxd5 11. cxd5 e4 12. dxc6 exd3 13. cxb7 Bxb7 14. Qxd3 Be4 15. Qa3 c5 16. dxc5 Rfc8 17. Kd2 dxc5 18. Qc3 Rab8 19. Ke2 Qb7 20. b3 Qa6+ 21. Qc4 Qxa2+ 22. Rd2 Bxf3+ 23. gxf3 Qxb3 24. Qxb3 Rxb3 25. Rc1 Kf8 26. Rd7 a6 27. Ra7 Rb6 28. e4 c4 29. Rd1 c3 30. Rdd7 Rf6 31. Rdc7 Rxc7 32. Rxc7 Rh6 33. Rxc3 Rh4 34. h3 Rxh3 35. Rc7 Rh2 36. Rc8+ Ke7 37. Rc7+ Ke8 38. Rc8+ Kd7 39. Ra8 Rh6 40. Ra7+ Ke8 41. Ra8+ Ke7 42. Ra7+ Kf6 43. Rxa6+ Kg5 44. Ra5+ Kg6 45. f4 f6 46. Ra7 Rh1 47. f5+ Kh6 48. Ke3 Rb1 49. Kf4 Rb5 50. Re7 Ra5 51. Rf7 Re5 52. f3 Ra5 53. Rb7 Rc5 54. Rb6 Ra5 55. Kg4 Re5 56. Ra6 Rb5 57. f4 Rb7 58. e5 Rf7 59. Rd6 Rf8 60. Rd7 Re8 61. Rd1 1-0

[Event "Bruges Masters op"]
[Site "Bruges"]
[Date "2023.08.15"]
[Round "6"]
[White "Victor, Julian"]
[Black "Ondersteijn, Niels"]
[Result "1/2-1/2"]
[ECO "B08"]
[WhiteElo "2107"]
[BlackElo "2375"]
[PlyCount "76"]
[EventDate "2023.08.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BEL"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 d6 2. e4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Be2 0-0 6. 0-0 a6 7. a4 Nc6 8. d5 Nb4 9. a5 e6 10. Re1 exd5 11. exd5 c6 12. Bc4 Bf5 13. Nd4 Bg4 14. f3 cxd5 15. Bb3 Bd7 16. Bg5 h6 17. Bh4 Qc7 18. Kh1 g5 19. Bf2 Rae8 20. Rxe8 Rxe8 21. Qd2 Be6 22. Nce2 Nc6 23. Ng3 Qc8 24. Ba4 Bd7 25. c3 Ne5 26. Bxd7 Qxd7 27. Ndf5 Nc6 28. Be3 Re5 29. Nxg7 Kxg7 30. f4 Ne4 31. Nxe4 Rxe4 32. fxg5 h5 33. Rf1 Qe6 34. Rf6 Qe5 35. Rf3 Ra4 36. Qd1 Re4 37. Qd2 Ra4 38. Qd1 Re4 1/2-1/2

[Event "Bruges Masters op"]
[Site "Bruges"]
[Date "2023.08.14"]
[Round "4"]
[White "Koridze, Lile"]
[Black "Ondersteijn, Niels"]
[Result "0-1"]
[ECO "A91"]
[WhiteElo "2152"]
[BlackElo "2375"]
[PlyCount "122"]
[EventDate "2023.08.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BEL"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 f5 2. c4 e6 3. g3 Nf6 4. Bg2 Be7 5. Nh3 0-0 6. 0-0 d6 7. Nc3 e5 8. dxe5 dxe5 9. Qxd8 Bxd8 10. e4 c6 11. Be3 Na6 12. Rad1 h6 13. f3 fxe4 14. Nxe4 Nxe4 15. fxe4 Be6 16. Rxf8+ Kxf8 17. b3 Bb6 18. Bxb6 axb6 19. Nf2 Nb4 20. a4 Ke7 21. Rd2 Na6 22. Bf3 Nc5 23. Bd1 Na6 24. Nd3 Rd8 25. Kf2 Nc5 26. Ke3 Rd4 27. Nxc5 bxc5 28. Be2 Kd6 29. Ra2 Kc7 30. a5 Rd8 31. Bd3 Ra8 32. Bb1 Rf8 33. Bd3 Kb8 34. Be2 Ka7 35. Ra4 Rd8 36. Ra1 Ka6 37. Ra4 Rd4 38. Ra1 Bf7 39. Ra4 Bg6 40. Bf3 Bh7 41. Ra2 Bg6 42. Ra4 h5 43. h3 Bf7 44. Be2 g6 45. Ra2 Be6 46. g4 hxg4 47. hxg4 Rd8 48. Bf3 Rh8 49. Rd2 g5 50. Rd6 Re8 51. Kd2 Kxa5 52. Kc3 Kb6 53. b4 Bc8 54. bxc5+ Kxc5 55. Rg6 Rh8 56. Be2 Rh3+ 57. Kd2 Kd4 58. Rxg5 Rh2 59. Rg6 Kxe4 60. Rg5 Be6 61. Rh5 Rxe2+ 0-1

[Event "Bruges Masters op"]
[Site "Bruges"]
[Date "2023.08.13"]
[Round "2"]
[White "Faybish, Benjamin"]
[Black "Ondersteijn, Niels"]
[Result "0-1"]
[ECO "E94"]
[WhiteElo "2064"]
[BlackElo "2375"]
[PlyCount "92"]
[EventDate "2023.08.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BEL"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 d6 2. Nf3 Nf6 3. c4 g6 4. Nc3 Bg7 5. e4 0-0 6. Be2 Nbd7 7. 0-0 e5 8. Be3 Qe7 9. Qc2 c6 10. d5 c5 11. Ne1 Kh8 12. Nd3 Ng8 13. Qd2 f5 14. f3 h5 15. a3 f4 16. Bf2 g5 17. b4 b6 18. a4 g4 19. fxg4 Bh6 20. Qd1 hxg4 21. Bxg4 Ngf6 22. Be6 Qh7 23. Bf5 Qg7 24. Nb5 Ne8 25. Qf3 cxb4 26. Nxb4 Rxf5 27. exf5 Ndf6 28. Qc3 Bxf5 29. a5 Ne4 30. Qe1 f3 31. g3 Bd2 32. Qd1 Bg4 33. Qc2 Qh7 34. h4 Bxb4 35. axb6 a5 36. Be3 N8f6 37. Nxd6 Bxd6 38. Rfd1 f2+ 39. Bxf2 Bxd1 40. Rxd1 Nxf2 41. Qxf2 Ne4 42. Qf3 Rf8 43. Qg4 Rg8 44. Qe6 Rxg3+ 45. Kf1 Qxh4 46. b7 Qf4+ 0-1

[Event "Bruges Masters op"]
[Site "Bruges"]
[Date "2023.08.13"]
[Round "3"]
[White "Ondersteijn, Niels"]
[Black "De Boer, Bas"]
[Result "1/2-1/2"]
[ECO "C28"]
[WhiteElo "2375"]
[BlackElo "2155"]
[PlyCount "111"]
[EventDate "2023.08.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BEL"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. Bc4 Nc6 4. d3 Na5 5. Bb3 Nxb3 6. axb3 d5 7. Nf3 d4 8. Ne2 Bd6 9. c3 dxc3 10. bxc3 0-0 11. 0-0 Re8 12. Ng3 c6 13. Re1 Bc7 14. h3 h6 15. Nh4 Kh7 16. Qf3 Be6 17. Nhf5 Ng8 18. Qe2 g6 19. Ne3 Re7 20. Qc2 Rd7 21. Rd1 a5 22. c4 b5 23. Bb2 f6 24. Ne2 Bb6 25. Bc1 Bf7 26. Kh1 a4 27. bxa4 bxc4 28. dxc4 Rxd1+ 29. Nxd1 Bxc4 30. Qxc4 Qxd1+ 31. Kh2 Qd7 32. Be3 Bxe3 33. fxe3 Kg7 34. Nc3 Ra7 35. Rd1 Qf7 36. Qc5 Rd7 37. Qxc6 Rc7 38. Qb5 Rxc3 39. Rd7 Ne7 40. Qb4 Rc4 41. Qb7 Kf8 42. a5 Qe8 43. a6 Rb4 44. Qc7 Rc4 45. Qb7 Rb4 46. Qa7 Rc4 47. Rd6 Rc6 48. Rxc6 Nxc6 49. Qb7 Kg8 50. Kg3 Qe6 51. a7 Nxa7 52. Qxa7 h5 53. Kf3 Qb3 54. Qa8+ Kg7 55. Qd8 Qf7 56. Qd6 1/2-1/2

[Event "Bruges Masters op"]
[Site "Bruges"]
[Date "2023.08.12"]
[Round "1"]
[White "Ondersteijn, Niels"]
[Black "Govoreanu, Matei"]
[Result "1-0"]
[ECO "A36"]
[WhiteElo "2375"]
[BlackElo "1900"]
[PlyCount "95"]
[EventDate "2023.08.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BEL"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. c4 c5 2. g3 g6 3. Bg2 Bg7 4. Nc3 Nc6 5. d3 d6 6. e4 e5 7. Nge2 Nge7 8. 0-0 0-0 9. a3 Be6 10. Rb1 a5 11. Bg5 h6 12. Bd2 Kh7 13. Nb5 f5 14. exf5 Bxf5 15. Be3 Qd7 16. Nec3 Nd4 17. Bxd4 exd4 18. Nd5 Nxd5 19. Bxd5 a4 20. Re1 Rfe8 21. Qf3 Re5 22. Rxe5 Bxe5 23. Re1 Rb8 24. h4 h5 25. Qd1 Rf8 26. f4 Bg7 27. Qe2 Rf6 28. Qf3 b6 29. Bc6 Qf7 30. Be8 Qf8 31. Nc7 Bg4 32. Qd5 Bf5 33. Ne6 Bxe6 34. Rxe6 Rxe6 35. Qxe6 Qf6 36. Qxf6 Bxf6 37. Bxa4 Kg7 38. Be8 Bd8 39. Kf2 Kf6 40. Kf3 Kf5 41. Bd7+ Kf6 42. Ke4 Ke7 43. Bb5 Kf7 44. Kd5 Ke7 45. Kc6 Ke6 46. Ba6 Ke7 47. Bc8 Kf6 48. Kxd6 1-0

[Event "Utrecht OKU op 48th"]
[Site "Utrecht"]
[Date "2023.05.21"]
[Round "5"]
[White "Ondersteijn, Niels"]
[Black "Roorda, Thijs"]
[Result "1-0"]
[ECO "A30"]
[WhiteElo "2375"]
[BlackElo "2099"]
[PlyCount "115"]
[EventDate "2023.05.19"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. c4 e6 2. g3 c5 3. Nf3 b6 4. Bg2 Bb7 5. 0-0 Nf6 6. Nc3 Be7 7. b3 0-0 8. d4 cxd4 9. Qxd4 Nc6 10. Qd2 Qb8 11. Bb2 Rd8 12. e4 Bb4 13. Qe2 Ne7 14. e5 Bxc3 15. Bxc3 Ne4 16. Bb2 a5 17. Rfd1 Nc5 18. Rd2 Ra7 19. Ba3 Ng6 20. Rd6 Bc6 21. Nd4 Bxg2 22. Kxg2 a4 23. Nb5 Qa8+ 24. f3 Rb7 25. b4 Na6 26. Rad1 Ne7 27. Qe4 Qc8 28. R6d3 Rb8 29. Nd6 Qc7 30. Qf4 Rf8 31. Nb5 Qc6 32. Rd6 Qc8 33. Na7 Qc7 34. Nb5 Qc8 35. Nc3 Nf5 36. R6d3 Nc7 37. b5 Rd8 38. g4 Nh4+ 39. Kg3 Ng6 40. Qe4 Ne8 41. f4 f5 42. gxf5 exf5 43. Qxf5 Qxc4 44. h4 d6 45. h5 Ne7 46. Qg4 Qf7 47. e6 Nf5+ 48. Kh2 Qf6 49. Nd5 Qxe6 50. Qxf5 Qxf5 51. Ne7+ Kf7 52. Nxf5 d5 53. Rxd5 Rxd5 54. Rxd5 Nf6 55. Nd6+ Ke6 56. Re5+ Kd7 57. Kh3 h6 58. Nc4 1-0

[Event "Utrecht OKU op 48th"]
[Site "Utrecht"]
[Date "2023.05.21"]
[Round "6"]
[White "Smeets, Kobe"]
[Black "Ondersteijn, Niels"]
[Result "1-0"]
[ECO "B36"]
[WhiteElo "2104"]
[BlackElo "2375"]
[PlyCount "97"]
[EventDate "2023.05.19"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. c4 Nc6 4. d4 cxd4 5. Nxd4 Nf6 6. Nc3 d6 7. Be2 Nxd4 8. Qxd4 Bg7 9. Be3 0-0 10. Qd3 a5 11. 0-0 a4 12. Rac1 Be6 13. Bd4 Nd7 14. Nb5 Nc5 15. Qe3 Qb6 16. Kh1 Bd7 17. Rc2 Rfc8 18. Rfc1 Bc6 19. Bxg7 Kxg7 20. e5 Be4 21. Rd2 dxe5 22. Nc3 Bc6 23. Qxe5+ Kg8 24. Qxe7 Re8 25. Qg5 Ra5 26. Qg3 Ne6 27. Nd5 Bxd5 28. cxd5 Nd4 29. Bc4 Nf5 30. Qf4 Rc5 31. Rcd1 Qb4 32. b3 axb3 33. axb3 b5 34. d6 bxc4 35. d7 Rd8 36. Re2 Qb5 37. Qe4 Ng7 38. Qe7 Qb6 39. Rd6 Qb8 40. Rf6 Rf8 41. Qxc5 cxb3 42. Qd6 Qa8 43. Re1 Ne6 44. Rfxe6 fxe6 45. Qxe6+ Kg7 46. Qxb3 Rxf2 47. Qc3+ Kf7 48. Qc4+ Kf6 49. Qd4+ 1-0

[Event "Utrecht OKU op 48th"]
[Site "Utrecht"]
[Date "2023.05.20"]
[Round "3"]
[White "Abdulla, Murad"]
[Black "Ondersteijn, Niels"]
[Result "1/2-1/2"]
[ECO "B34"]
[WhiteElo "2307"]
[BlackElo "2375"]
[PlyCount "72"]
[EventDate "2023.05.19"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nc3 c5 4. Nge2 cxd4 5. Nxd4 Nc6 6. Be3 Nf6 7. Nb3 0-0 8. Be2 a5 9. a4 Nb4 10. 0-0 d5 11. exd5 Nfxd5 12. Nxd5 Nxd5 13. Bd4 Bxd4 14. Qxd4 e5 15. Qc5 b6 16. Qc6 Ra7 17. Rfd1 Rd7 18. Bf3 Nb4 19. Rxd7 Bxd7 20. Qd6 e4 21. Be2 Be6 22. Rd1 Qxd6 23. Rxd6 Nxc2 24. Nd2 e3 25. fxe3 Nxe3 26. Rxb6 Rc8 27. Kf2 Nd5 28. Rb5 Rc2 29. Ke1 Kg7 30. Bf3 Ne3 31. Be4 Rc1+ 32. Ke2 Nd1 33. Nb3 Rc4 34. Nd2 Rc1 35. Nb3 Rc4 36. Nd2 Rc1 1/2-1/2

[Event "Utrecht OKU op 48th"]
[Site "Utrecht"]
[Date "2023.05.20"]
[Round "4"]
[White "Ondersteijn, Niels"]
[Black "Sekandar, Kambiz"]
[Result "0-1"]
[ECO "D20"]
[WhiteElo "2375"]
[BlackElo "2249"]
[PlyCount "88"]
[EventDate "2023.05.19"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 d5 2. c4 dxc4 3. e3 b5 4. a4 b4 5. Qf3 c6 6. Bxc4 Nf6 7. Ne2 Bb7 8. a5 a6 9. e4 e6 10. Bg5 Be7 11. Bxf6 Bxf6 12. e5 Be7 13. Nd2 Nd7 14. Nf4 Nf8 15. Nb3 Ng6 16. Nd3 Rb8 17. Qg4 h5 18. Qe2 c5 19. dxc5 Bxg2 20. Rg1 Bd5 21. Rc1 0-0 22. Nd2 Bg5 23. Rxg5 Qxg5 24. Bxd5 exd5 25. Nf3 Qg4 26. Qe3 Rfe8 27. Kd2 d4 28. Nxd4 Rbd8 29. Rc4 Rd5 30. f4 Red8 31. c6 Qg2+ 32. Qe2 Qxe2+ 33. Kxe2 Rxd4 34. c7 Rxd3 35. c8Q Nxf4+ 36. Rxf4 Rd2+ 37. Ke3 Rxc8 38. Kxd2 b3 39. Rb4 Rc2+ 40. Kd3 Rxb2 41. Rb6 Rxh2 42. Rxa6 Ra2 43. Kc3 b2 44. Kc2 h4 0-1

[Event "Utrecht OKU op 48th"]
[Site "Utrecht"]
[Date "2023.05.19"]
[Round "2"]
[White "Ondersteijn, Niels"]
[Black "Ercan, Selman"]
[Result "1-0"]
[ECO "D45"]
[WhiteElo "2375"]
[BlackElo "2044"]
[PlyCount "69"]
[EventDate "2023.05.19"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Be2 dxc4 7. a4 Bb4 8. 0-0 0-0 9. Bxc4 a5 10. e4 Bxc3 11. bxc3 Nxe4 12. Qc2 Nef6 13. Ne5 Nxe5 14. dxe5 Nd5 15. Ba3 Re8 16. Rad1 Qg5 17. Rfe1 Bd7 18. Rd3 b5 19. Rh3 g6 20. Bc1 Qe7 21. Bf1 h5 22. Rg3 Kg7 23. Rd1 Rac8 24. c4 bxc4 25. Bxc4 Qc5 26. Ba3 Qa7 27. Bd3 Nf4 28. Bc5 Qc7 29. Be4 Rg8 30. Be3 Nd5 31. Bxg6 Kf8 32. Bc5+ Ne7 33. Bxf7 Rxg3 34. fxg3 Qxe5 35. Qf2 1-0

[Event "Utrecht OKU op 48th"]
[Site "Utrecht"]
[Date "2023.05.19"]
[Round "1"]
[White "Van Wijk, Peter"]
[Black "Ondersteijn, Niels"]
[Result "0-1"]
[ECO "B07"]
[WhiteElo "2001"]
[BlackElo "2375"]
[PlyCount "72"]
[EventDate "2023.05.19"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bg5 Bg7 5. Qd2 h6 6. Bf4 a6 7. 0-0-0 b5 8. f3 Nbd7 9. d5 Nb6 10. Bd3 Nfd7 11. Be3 Bb7 12. f4 c5 13. dxc6 Bxc6 14. Nf3 Qc7 15. f5 g5 16. Bd4 Ne5 17. Nxe5 Bxe5 18. Bxe5 dxe5 19. h4 g4 20. h5 Nd7 21. Ne2 Nf6 22. Ng3 0-0-0 23. Qe3 Kb7 24. c3 b4 25. Bc2 bxc3 26. Qxc3 Rd4 27. Qb3+ Ka8 28. Rxd4 exd4 29. Re1 Bb5 30. e5 d3 31. exf6 Qf4+ 32. Kb1 dxc2+ 33. Qxc2 Qxg3 34. Qe4+ Kb8 35. Re3 Qd6 36. fxe7 Qd1# 0-1

[Event "NED-chT 2223"]
[Site "Netherlands"]
[Date "2023.04.22"]
[Round "9.10"]
[White "Ondersteijn, Niels"]
[Black "Baselmans, Luuk"]
[Result "1/2-1/2"]
[ECO "D38"]
[WhiteElo "2382"]
[BlackElo "2254"]
[PlyCount "83"]
[EventDate "2022.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]
[WhiteTeam "Paul Keres"]
[BlackTeam "De Stukkenjagers"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. cxd5 exd5 6. Bg5 0-0 7. e3 Re8 8. Bd3 c6 9. Qc2 h6 10. Bh4 Bd6 11. 0-0-0 b5 12. e4 b4 13. e5 bxc3 14. exf6 g5 15. Bh7+ Kf8 16. Bg3 cxb2+ 17. Kb1 Qxf6 18. h4 g4 19. Ne5 Na6 20. Nd3 Bxg3 21. fxg3 Qg7 22. Ne5 c5 23. Rhf1 Rxe5 24. dxe5 c4 25. a3 Nc7 26. Bf5 Qxe5 27. Bxc8 Rxc8 28. Rde1 Qg7 29. Qf5 Rb8 30. a4 c3 31. Re2 d4 32. Qc5+ Kg8 33. Qxc7 Qg6+ 34. Rc2 Re8 35. h5 Qe6 36. Re2 Qxe2 37. Qxf7+ Kh8 38. Qf6+ Kg8 39. Qg6+ Kh8 40. Qxh6+ Kg8 41. Qg5+ Kh8 42. Qh6+ 1/2-1/2

[Event "NED-chT 2223"]
[Site "Netherlands"]
[Date "2023.04.01"]
[Round "8.8"]
[White "Kollen, Zyon"]
[Black "Ondersteijn, Niels"]
[Result "0-1"]
[ECO "B07"]
[WhiteElo "2343"]
[BlackElo "2382"]
[PlyCount "130"]
[EventDate "2022.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]
[WhiteTeam "Charlois Europoort"]
[BlackTeam "Paul Keres"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be3 a6 5. Qd2 b5 6. f3 Nbd7 7. h4 Nb6 8. Bd3 c6 9. a4 Nc4 10. Bxc4 bxc4 11. a5 Rb8 12. Na4 d5 13. e5 Nd7 14. h5 gxh5 15. Ne2 Rb5 16. Nec3 Rxa5 17. Rxh5 e6 18. Kf2 Bb4 19. Qd1 c5 20. dxc5 Bb7 21. Ne2 Bc6 22. Nac3 Bxc5 23. Bxc5 Rxa1 24. Qxa1 Nxc5 25. Qd1 Qb6 26. Qd4 Kf8 27. Ke1 Nd7 28. Qxb6 Nxb6 29. Kd2 Be8 30. g4 h6 31. Rh1 Nd7 32. f4 Kg7 33. Ra1 Nb8 34. Ke3 f6 35. Nd4 fxe5 36. fxe5 Kf7 37. Nce2 Rg8 38. Rf1+ Ke7 39. Rf6 Rg6 40. Rf4 Ba4 41. Nc3 Be8 42. Nf3 Rg8 43. Ne2 Nc6 44. Ned4 Nxd4 45. Nxd4 h5 46. Rf6 Bd7 47. gxh5 Rg5 48. Nf3 Rxh5 49. Rg6 Rf5 50. Rg7+ Kd8 51. c3 a5 52. Rg5 Rf7 53. Rg6 Ke7 54. Nd4 Rh7 55. Nf3 Rh1 56. Rg7+ Kd8 57. Rg1 Rh3 58. Kf4 a4 59. Rg3 Rh1 60. Rg1 Rxg1 61. Nxg1 d4 62. Ne2 d3 63. Ke3 dxe2 64. Kxe2 Kc7 65. Ke3 Kb6 0-1

[Event "NED-chT 2223"]
[Site "Netherlands"]
[Date "2023.03.11"]
[Round "7.10"]
[White "Ondersteijn, Niels"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "D10"]
[WhiteElo "2382"]
[BlackElo "2407"]
[PlyCount "40"]
[EventDate "2022.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 213 Extra"]
[Source "ChessBase"]
[SourceDate "2023.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.05.31"]
[SourceQuality "1"]
[WhiteTeam "Paul Keres"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 Bf5 5. cxd5 cxd5 6. Qb3 Nc6 7. Qxb7 Bd7 8. Qb3 Rb8 9. Qd1 e5 10. dxe5 Nxe5 11. Be2 Bd6 12. Nf3 Nxf3+ 13. Bxf3 Qc7 14. a4 0-0 15. h3 Rfd8 16. 0-0 Bh2+ 17. Kh1 Be5 18. Nb5 Bxb5 19. axb5 Rxb5 20. Qa4 Rdb8 1/2-1/2

[Event "Wachtebeke"]
[Site "Wachtebeke"]
[Date "2023.02.23"]
[Round "9"]
[White "Ochs, Daniel Elias"]
[Black "Ondersteijn, Niels"]
[Result "0-1"]
[ECO "E62"]
[WhiteElo "2223"]
[BlackElo "2390"]
[PlyCount "82"]
[EventDate "2023.02.18"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "BEL"]
[EventCategory "4"]
[SourceTitle "CBM 212 Extra"]
[Source "ChessBase"]
[SourceDate "2023.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.03.31"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 0-0 5. 0-0 d6 6. c4 Nc6 7. Nc3 e5 8. dxe5 Nxe5 9. b3 Nxf3+ 10. exf3 c6 11. Be3 Qa5 12. Rc1 Rd8 13. Bd4 Be6 14. Qd2 d5 15. c5 Ne4 16. Nxe4 Qxd2 17. Nxd2 Bxd4 18. Rfd1 Bf5 19. g4 Bd7 20. h3 b6 21. b4 Be5 22. Nb3 b5 23. Bf1 Bc7 24. Nd4 Be5 25. a4 a6 26. a5 Re8 27. Ne2 Re7 28. Kg2 Rae8 29. Nd4 Kg7 30. Nc2 h5 31. Ne1 f5 32. gxh5 gxh5 33. Nd3 Bc7 34. Re1 Kf6 35. Rxe7 Rxe7 36. f4 Re4 37. Re1 h4 38. Be2 Bxf4 39. Bf3 Rd4 40. Nxf4 Rxf4 41. Rb1 Rd4 0-1

[Event "Wachtebeke"]
[Site "Wachtebeke"]
[Date "2023.02.23"]
[Round "8"]
[White "Ondersteijn, Niels"]
[Black "Dauw, Sterre"]
[Result "1/2-1/2"]
[ECO "D24"]
[WhiteElo "2390"]
[BlackElo "2265"]
[PlyCount "87"]
[EventDate "2023.02.18"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "BEL"]
[EventCategory "4"]
[SourceTitle "CBM 212 Extra"]
[Source "ChessBase"]
[SourceDate "2023.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.03.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 dxc4 5. e4 Bb4 6. Bxc4 Nxe4 7. 0-0 Nf6 8. Qa4+ Nc6 9. Ne5 Rb8 10. Rd1 0-0 11. Nxc6 bxc6 12. Qxa7 Bd7 13. Qa4 Nd5 14. Qc2 f5 15. Na4 Bd6 16. Nc5 Bc8 17. Nd3 Qh4 18. Ne5 c5 19. Nf3 Qe4 20. Bd3 Qg4 21. h3 Qg6 22. dxc5 Nb4 23. Qc3 Bb7 24. Be2 Be7 25. a3 Bf6 26. Qd2 Rfd8 27. Qxb4 Bxf3 28. Rxd8+ Bxd8 29. Bxf3 Rxb4 30. axb4 Bg5 31. Bxg5 Qxg5 32. b5 Qd2 33. b6 cxb6 34. cxb6 Qxb2 35. Ra8+ Kf7 36. b7 Qc1+ 37. Kh2 Qf4+ 38. Kg1 Qc1+ 39. Bd1 Qxd1+ 40. Kh2 Qd6+ 41. Kg1 Qd1+ 42. Kh2 Qd6+ 43. g3 Qb6 44. b8Q 1/2-1/2

[Event "Wachtebeke"]
[Site "Wachtebeke"]
[Date "2023.02.22"]
[Round "7"]
[White "Milliet, Sophie"]
[Black "Ondersteijn, Niels"]
[Result "1-0"]
[ECO "B07"]
[WhiteElo "2376"]
[BlackElo "2390"]
[PlyCount "97"]
[EventDate "2023.02.18"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "BEL"]
[EventCategory "4"]
[SourceTitle "CBM 212 Extra"]
[Source "ChessBase"]
[SourceDate "2023.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.03.31"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be3 a6 5. h3 Bg7 6. f4 e6 7. Nf3 Nc6 8. e5 Nd5 9. Nxd5 exd5 10. Qd2 f6 11. exd6 Qxd6 12. g4 Bd7 13. 0-0-0 0-0-0 14. Rg1 Qb4 15. Qxb4 Nxb4 16. Bd2 Bf8 17. c3 Nc6 18. Bd3 Bd6 19. f5 gxf5 20. gxf5 Ne7 21. Nh4 Rdg8 22. Rdf1 Rxg1 23. Rxg1 Rg8 24. Rg4 Bg3 25. Ng2 h5 26. Rxg8+ Nxg8 27. Bf4 h4 28. Kd2 Bxf4+ 29. Nxf4 Ne7 30. Ng6 Ng8 31. Ke3 Kd8 32. Kf4 Nh6 33. Nxh4 a5 34. Ng2 Ke7 35. Ne3 c6 36. h4 Be8 37. Be2 Bf7 38. Bd1 Be8 39. c4 Bf7 40. c5 Kd8 41. Nf1 Kc7 42. Nd2 Be8 43. a4 Bd7 44. Bc2 b6 45. cxb6+ Kxb6 46. Nb3 Bc8 47. Nc5 Kc7 48. Bd3 Kd6 49. Nb3 1-0

[Event "Wachtebeke"]
[Site "Wachtebeke"]
[Date "2023.02.21"]
[Round "6"]
[White "Ondersteijn, Niels"]
[Black "De Waele, Warre"]
[Result "0-1"]
[ECO "C28"]
[WhiteElo "2390"]
[BlackElo "2304"]
[PlyCount "88"]
[EventDate "2023.02.18"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "BEL"]
[EventCategory "4"]
[SourceTitle "CBM 212 Extra"]
[Source "ChessBase"]
[SourceDate "2023.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.03.31"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. Bc4 Nc6 4. d3 Bc5 5. f4 d6 6. Nf3 exf4 7. Bxf4 0-0 8. d4 Bb4 9. Bg5 h6 10. Bxf6 Qxf6 11. 0-0 Bxc3 12. bxc3 Qg6 13. Qd2 Ne7 14. Rae1 Be6 15. Bd3 Qh5 16. c4 f6 17. Kh1 c5 18. e5 dxe5 19. dxe5 f5 20. Rb1 b6 21. a4 Nc6 22. Qc3 Rad8 23. Nd2 Qg4 24. Nb3 Nb4 25. a5 f4 26. axb6 axb6 27. Nd2 Nxd3 28. cxd3 Qe2 29. Nf3 Rxd3 30. Qc1 Bh3 31. Nh4 Rd2 32. Qxd2 Qxd2 33. gxh3 Qe2 34. Rbe1 Qxc4 35. e6 Qd5+ 36. Nf3 Re8 37. Re5 Qd3 38. Rf2 c4 39. e7 c3 40. Ne1 Qd4 41. Rfe2 f3 42. Nxf3 Qd1+ 43. Ne1 b5 44. Kg2 b4 0-1

[Event "Wachtebeke"]
[Site "Wachtebeke"]
[Date "2023.02.20"]
[Round "4"]
[White "Dgebuadze, Alexandre"]
[Black "Ondersteijn, Niels"]
[Result "1/2-1/2"]
[ECO "B08"]
[WhiteElo "2419"]
[BlackElo "2390"]
[PlyCount "44"]
[EventDate "2023.02.18"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "BEL"]
[EventCategory "4"]
[SourceTitle "CBM 212 Extra"]
[Source "ChessBase"]
[SourceDate "2023.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.03.31"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bg5 Bg7 5. Nf3 Nc6 6. h3 a6 7. Qd2 d5 8. Bxf6 exf6 9. exd5 Ne7 10. Bc4 b5 11. Bb3 Bb7 12. 0-0 0-0 13. a4 b4 14. Ne4 Nxd5 15. Rfe1 a5 16. c4 bxc3 17. bxc3 Nb6 18. Qd3 Re8 19. Nc5 Bc6 20. Rxe8+ Bxe8 21. Rd1 Bf8 22. Qc2 Bc6 1/2-1/2

[Event "Wachtebeke"]
[Site "Wachtebeke"]
[Date "2023.02.20"]
[Round "5"]
[White "Ondersteijn, Niels"]
[Black "Pirard, Natan"]
[Result "1-0"]
[ECO "B23"]
[WhiteElo "2390"]
[BlackElo "2314"]
[PlyCount "93"]
[EventDate "2023.02.18"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "BEL"]
[EventCategory "4"]
[SourceTitle "CBM 212 Extra"]
[Source "ChessBase"]
[SourceDate "2023.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.03.31"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. Bb5 Nd4 4. Bc4 e6 5. Nge2 Nf6 6. 0-0 d5 7. exd5 exd5 8. Nxd5 Nxd5 9. Nxd4 cxd4 10. Qh5 Be6 11. Re1 Nc7 12. Bxe6 Nxe6 13. Rxe6+ Be7 14. Qb5+ Qd7 15. Re5 Rc8 16. c4 Qxb5 17. Rxb5 b6 18. d3 Bc5 19. Bd2 Kd7 20. Rb3 Rhe8 21. Re1 Rxe1+ 22. Bxe1 Re8 23. Kf1 Re5 24. Bd2 h5 25. a4 Kc6 26. a5 Be7 27. f4 Rf5 28. axb6 axb6 29. Ke2 g5 30. Rb5 Rxb5 31. cxb5+ Kxb5 32. fxg5 Ka4 33. h4 Bd6 34. g4 hxg4 35. h5 Be5 36. h6 Kb5 37. h7 Kc6 38. Bf4 Bg7 39. Kf2 Kd7 40. Kg3 f5 41. gxf6 Bxf6 42. Kxg4 Ke6 43. Bg5 Be5 44. Bd8 b5 45. Kg5 Kf7 46. Kf5 Bh8 47. Bc7 1-0

[Event "Wachtebeke"]
[Site "Wachtebeke"]
[Date "2023.02.19"]
[Round "3"]
[White "Ondersteijn, Niels"]
[Black "De Vleeschauwer, Maarten"]
[Result "1/2-1/2"]
[ECO "D45"]
[WhiteElo "2390"]
[BlackElo "2265"]
[PlyCount "137"]
[EventDate "2023.02.18"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "BEL"]
[EventCategory "4"]
[SourceTitle "CBM 212 Extra"]
[Source "ChessBase"]
[SourceDate "2023.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.03.31"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Be2 Bd6 7. 0-0 0-0 8. b3 Qe7 9. Bb2 b6 10. Bd3 Bb7 11. Re1 c5 12. cxd5 exd5 13. Rc1 Rac8 14. Qe2 Ne4 15. dxc5 Ndxc5 16. Nb5 Bb8 17. Nbd4 g6 18. Bb5 a6 19. Bd3 Rfe8 20. a3 b5 21. Bb1 Nd7 22. Rxc8 Rxc8 23. Rc1 Rxc1+ 24. Bxc1 Qc5 25. Qc2 Bd6 26. Qxc5 Ndxc5 27. Bb2 Bc8 28. h3 Bd7 29. b4 Na4 30. Ba1 Nb6 31. Bxe4 dxe4 32. Nd2 f5 33. Kf1 Kf7 34. Ke2 Ke7 35. N4b3 Be6 36. Kd1 Bxb3+ 37. Nxb3 Nc4 38. Bd4 Nxa3 39. Bc5 Nc4 40. Bxd6+ Kxd6 41. Kc2 Kd5 42. Kc3 Ne5 43. Nc1 h6 44. Ne2 Nd3 45. f3 Ke5 46. f4+ Kd5 47. g4 fxg4 48. hxg4 h5 49. f5 hxg4 50. fxg6 Ke6 51. Ng3 Nf2 52. Nh5 Nh3 53. Kd4 Nf2 54. g7 Kf7 55. Kd5 Nd3 56. Kxe4 Nxb4 57. Kd4 Nc6+ 58. Ke4 Ne7 59. Nf4 b4 60. Nd3 b3 61. Kf4 Nd5+ 62. Kxg4 Nxe3+ 63. Kf3 Nc4 64. Ke4 b2 65. Nxb2 Nxb2 66. Kd5 Kxg7 67. Kc5 Na4+ 68. Kb4 a5+ 69. Kxa5 1/2-1/2

[Event "Wachtebeke"]
[Site "Wachtebeke"]
[Date "2023.02.18"]
[Round "2"]
[White "Maerevoet, Sim"]
[Black "Ondersteijn, Niels"]
[Result "1/2-1/2"]
[ECO "E94"]
[WhiteElo "2425"]
[BlackElo "2390"]
[PlyCount "103"]
[EventDate "2023.02.18"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "BEL"]
[EventCategory "4"]
[SourceTitle "CBM 212 Extra"]
[Source "ChessBase"]
[SourceDate "2023.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.03.31"]
[SourceQuality "1"]

1. d4 d6 2. Nf3 Nf6 3. c4 g6 4. Nc3 Bg7 5. e4 0-0 6. Be2 Nbd7 7. 0-0 e5 8. Be3 Qe7 9. d5 c5 10. Ne1 Kh8 11. a3 Ng8 12. b4 b6 13. bxc5 bxc5 14. f3 Bh6 15. Bf2 f5 16. Rb1 Ngf6 17. Qa4 fxe4 18. Nxe4 Nxe4 19. fxe4 Nf6 20. Bf3 Bg4 21. Qc2 Bxf3 22. Nxf3 Ng4 23. Rb3 Rf7 24. h3 Nxf2 25. Qxf2 Raf8 26. Rfb1 Qd7 27. Qe2 Qa4 28. Kf2 Qa5 29. Qc2 Qa4 30. Ke2 Qa6 31. Qd3 Qc8 32. Rf1 Qd7 33. Qb1 Qa4 34. Qd3 Qd7 35. Rfb1 Kg7 36. Rb8 Rxb8 37. Rxb8 Bf4 38. Qb3 g5 39. Ra8 Qb7 40. Rb8 Qe7 41. Qb5 Bc1 42. a4 Qf6 43. Rb7 h5 44. Kd1 g4 45. hxg4 hxg4 46. Rxf7+ Qxf7 47. Nh2 Bg5 48. g3 Qf2 49. Qd7+ Kg8 50. Qe6+ Kg7 51. Qd7+ Kg8 52. Qe6+ 1/2-1/2

[Event "Wachtebeke"]
[Site "Wachtebeke"]
[Date "2023.02.18"]
[Round "1"]
[White "Ondersteijn, Niels"]
[Black "Baselmans, Luuk"]
[Result "0-1"]
[ECO "A28"]
[WhiteElo "2390"]
[BlackElo "2343"]
[PlyCount "126"]
[EventDate "2023.02.18"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "BEL"]
[EventCategory "4"]
[SourceTitle "CBM 212 Extra"]
[Source "ChessBase"]
[SourceDate "2023.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.03.31"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e3 Bb4 5. Qc2 Bxc3 6. bxc3 0-0 7. e4 d6 8. g3 Bg4 9. Bg2 h6 10. d3 Ne7 11. h3 Be6 12. Ng1 c6 13. f4 b5 14. cxb5 cxb5 15. fxe5 dxe5 16. Nf3 Nh5 17. g4 Nf4 18. d4 f5 19. exf5 Nxg2+ 20. Qxg2 Bd5 21. 0-0 exd4 22. cxd4 Rc8 23. Be3 Qd6 24. Rac1 Qa3 25. Rce1 Rc3 26. Bc1 Qd6 27. Re3 Rfc8 28. Rxc3 Rxc3 29. Bb2 Rd3 30. g5 Nxf5 31. gxh6 Qxh6 32. Bc1 Qh5 33. Qg4 Qxg4+ 34. hxg4 Nxd4 35. Nxd4 Rxd4 36. a3 Rxg4+ 37. Kf2 Rc4 38. Ke3 Be6 39. Bb2 Rc2 40. Bd4 Rc7 41. Rb1 Bc4 42. Rb2 Re7+ 43. Kf4 a6 44. Be5 Bd3 45. Rd2 g5+ 46. Kg4 Rxe5 47. Rxd3 Kf7 48. Rd6 Re4+ 49. Kxg5 Ra4 50. Rd3 Ke6 51. Re3+ Kd5 52. Kf5 Kc5 53. Ke5 Rc4 54. Rd3 Kb6 55. Rd4 Ka5 56. Rxc4 bxc4 57. Kd4 Kb5 58. Kc3 Kc5 59. Kb2 Kd4 60. Kc2 c3 61. Kc1 Kc4 62. a4 Kb3 63. a5 c2 0-1

[Event "NED-chT 2223"]
[Site "Netherlands"]
[Date "2023.02.11"]
[Round "6.8"]
[White "Baltic, Fatih"]
[Black "Ondersteijn, Niels"]
[Result "1-0"]
[ECO "A49"]
[WhiteElo "2277"]
[BlackElo "2382"]
[PlyCount "105"]
[EventDate "2022.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]
[WhiteTeam "Zuid Limburg"]
[BlackTeam "Paul Keres"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. Nf3 d6 2. d4 Nf6 3. g3 g6 4. b3 Bg7 5. Bb2 a5 6. a4 0-0 7. Bg2 d5 8. 0-0 Ne4 9. Nfd2 f5 10. c4 c6 11. cxd5 cxd5 12. Na3 Ra6 13. Nf3 g5 14. Ne5 Rh6 15. f3 Nd6 16. f4 gxf4 17. Rxf4 Ne4 18. Qd3 Nc6 19. Nxc6 bxc6 20. Rc1 Qb6 21. Bxe4 dxe4 22. Qc4+ Be6 23. Qc3 Rb8 24. Rb1 Rh5 25. Ba1 Qa6 26. Rf2 Bd5 27. Nc2 e6 28. Ne3 Bh6 29. Nxd5 cxd5 30. e3 Rc8 31. Qd2 Rg5 32. Bc3 Rg4 33. Bxa5 Bxe3 34. Qxe3 Qxa5 35. Rc1 Rxc1+ 36. Qxc1 h5 37. Qc8+ Kf7 38. Rc2 Kf6 39. Qf8+ Kg6 40. Qe8+ Kf6 41. Qxh5 Qe1+ 42. Kg2 Qe3 43. Rc8 Qxd4 44. Qh8+ Rg7 45. Rc7 Qb2+ 46. Kh3 Kg6 47. Qxg7+ Qxg7 48. Rxg7+ Kxg7 49. a5 d4 50. Kg2 d3 51. Kf1 e5 52. a6 f4 53. gxf4 1-0

[Event "NED-chT 2223"]
[Site "Netherlands"]
[Date "2022.12.17"]
[Round "5.6"]
[White "Ondersteijn, Niels"]
[Black "Follesa, Enrico"]
[Result "1-0"]
[ECO "D45"]
[WhiteElo "2382"]
[BlackElo "2161"]
[PlyCount "47"]
[EventDate "2022.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 213 Extra"]
[Source "ChessBase"]
[SourceDate "2023.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.05.31"]
[SourceQuality "1"]
[WhiteTeam "Paul Keres"]
[BlackTeam "Sas van Gent"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. e3 Nbd7 6. Be2 Be7 7. 0-0 0-0 8. b3 b6 9. Bb2 Bb7 10. Rc1 Re8 11. Bd3 Bd6 12. e4 e5 13. dxe5 Nxe5 14. cxd5 cxd5 15. Nxd5 Nxd5 16. exd5 Nxf3+ 17. Qxf3 Bxd5 18. Qh3 g6 19. Bb5 Re4 20. Rfd1 Qg5 21. Rc8+ Rxc8 22. Qxc8+ Bf8 23. Bf1 Rg4 24. Rxd5 1-0

[Event "NED-chT 2223"]
[Site "Netherlands"]
[Date "2022.11.26"]
[Round "4.10"]
[White "Schippers, Maurice"]
[Black "Ondersteijn, Niels"]
[Result "0-1"]
[ECO "B07"]
[WhiteElo "2228"]
[BlackElo "2382"]
[PlyCount "90"]
[EventDate "2022.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 213 Extra"]
[Source "ChessBase"]
[SourceDate "2023.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.05.31"]
[SourceQuality "1"]
[WhiteTeam "Groningen Combinatie"]
[BlackTeam "Paul Keres"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. h4 a6 5. h5 Nxh5 6. Rxh5 gxh5 7. Qxh5 h6 8. Be3 Rg8 9. Bc4 e6 10. 0-0-0 b5 11. Bb3 Qf6 12. g3 Qg6 13. Qh1 Bb7 14. a3 c5 15. dxc5 dxc5 16. Nf3 Nc6 17. Nh4 Qg4 18. f3 Qg7 19. a4 c4 20. Ba2 Ba3 21. Bd2 0-0-0 22. Qe1 Rxd2 23. Qxd2 Rd8 24. Qe1 Bb4 25. Rxd8+ Nxd8 26. Ng2 Bxc3 27. Qxc3 Qxg3 28. Ne1 Nc6 29. Kd1 Qd6+ 30. Ke2 Nd4+ 31. Kf1 e5 32. axb5 axb5 33. Qe3 Qa6 34. c3 Ne6 35. Bb1 Qa1 36. Qc1 Ng5 37. Nc2 Qa7 38. Nb4 Nh3 39. Kg2 Nf4+ 40. Kf1 Nh3 41. Kg2 Qf2+ 42. Kxh3 Kb8 43. f4 exf4 44. Kg4 Bc8+ 45. Kh5 Qh2# 0-1

[Event "NED-chT 2223"]
[Site "Netherlands"]
[Date "2022.11.05"]
[Round "3.6"]
[White "Ondersteijn, Niels"]
[Black "Ijzermans, Gijs"]
[Result "1-0"]
[ECO "A57"]
[WhiteElo "2382"]
[BlackElo "2103"]
[PlyCount "53"]
[EventDate "2022.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 213 Extra"]
[Source "ChessBase"]
[SourceDate "2023.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.05.31"]
[SourceQuality "1"]
[WhiteTeam "Paul Keres"]
[BlackTeam "Amstelveen Zukertort"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 c5 3. d5 b5 4. Qc2 bxc4 5. e4 e6 6. Nc3 exd5 7. exd5 d6 8. Bxc4 Be7 9. Nf3 0-0 10. h3 Nbd7 11. 0-0 Nb6 12. b3 Rb8 13. Re1 Nxc4 14. bxc4 Qd7 15. Bg5 h6 16. Bh4 Ba6 17. Rxe7 Qxe7 18. Re1 Qd7 19. Bxf6 gxf6 20. Ne4 Qf5 21. Qc3 Kg7 22. Ng3 Qg6 23. Nh4 Qh7 24. Nh5+ Kh8 25. Qxf6+ Kg8 26. Nf5 Rfe8 27. Nxh6+ 1-0

[Event "NED-chT 2223"]
[Site "Netherlands"]
[Date "2022.10.08"]
[Round "2.7"]
[White "Ondersteijn, Niels"]
[Black "Colijn, Stefan"]
[Result "1/2-1/2"]
[ECO "A20"]
[WhiteElo "2382"]
[BlackElo "2275"]
[PlyCount "63"]
[EventDate "2022.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 213 Extra"]
[Source "ChessBase"]
[SourceDate "2023.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.05.31"]
[SourceQuality "1"]
[WhiteTeam "Paul Keres"]
[BlackTeam "Apeldoorn Amevo"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. c4 e5 2. g3 Nf6 3. Bg2 c6 4. Nf3 e4 5. Nd4 d5 6. d3 exd3 7. cxd5 cxd5 8. Qxd3 Nc6 9. Nc3 Bc5 10. Nxc6 bxc6 11. 0-0 0-0 12. Na4 Bd6 13. Be3 Re8 14. Rac1 Bd7 15. Nc5 Bxc5 16. Bxc5 Ne4 17. b4 a5 18. b5 Nxc5 19. Rxc5 Qe7 20. Rfc1 cxb5 21. Bxd5 Rad8 22. Rc7 Qf6 23. Bf3 Bg4 24. Qxb5 Bxf3 25. exf3 Qxf3 26. Qxa5 Re2 27. Qa7 Red2 28. Re1 h5 29. Qe3 Qxe3 30. Rxe3 Rxa2 31. Rf3 Rf8 32. Rfc3 1/2-1/2

[Event "EU-Cup 37th"]
[Site "Mayrhofen"]
[Date "2022.10.08"]
[Round "6.4"]
[White "Prohaszka, Peter"]
[Black "Ondersteijn, Niels"]
[Result "1-0"]
[ECO "A46"]
[WhiteElo "2570"]
[BlackElo "2382"]
[PlyCount "67"]
[EventDate "2022.10.03"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "AUT"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]
[WhiteTeam "Ajka BSK"]
[BlackTeam "Paul Keres"]
[WhiteTeamCountry "HUN"]
[BlackTeamCountry "NED"]

1. d4 d6 2. Nf3 Nf6 3. Bg5 Nbd7 4. c3 b6 5. Nbd2 Bb7 6. h3 c5 7. e3 g6 8. Bd3 Bg7 9. 0-0 0-0 10. Re1 Rc8 11. a4 Qc7 12. Qe2 Rfe8 13. e4 h6 14. Be3 cxd4 15. cxd4 e5 16. d5 Nh5 17. g3 Rf8 18. Rac1 Qxc1 19. Rxc1 Rxc1+ 20. Kh2 f5 21. Nc4 Rxc4 22. Bxc4 Ndf6 23. Nh4 f4 24. Nxg6 fxe3 25. Nxf8 Bxf8 26. Qxe3 Nd7 27. Qe2 Nhf6 28. Ba6 Bxa6 29. Qxa6 h5 30. b4 Bh6 31. Qxa7 h4 32. a5 hxg3+ 33. fxg3 bxa5 34. bxa5 1-0

[Event "EU-Cup 37th"]
[Site "Mayrhofen"]
[Date "2022.10.06"]
[Round "4.4"]
[White "Ondersteijn, Niels"]
[Black "Postny, Evgeny"]
[Result "0-1"]
[ECO "E15"]
[WhiteElo "2382"]
[BlackElo "2573"]
[PlyCount "114"]
[EventDate "2022.10.03"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "AUT"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]
[WhiteTeam "Paul Keres"]
[BlackTeam "Beer Sheva"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "ISR"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb4+ 5. Bd2 Bxd2+ 6. Qxd2 Ba6 7. b3 d5 8. cxd5 Ne4 9. Qc2 exd5 10. Bg2 0-0 11. 0-0 c5 12. Nc3 Nxc3 13. Qxc3 Bxe2 14. Rfe1 Bxf3 15. Qxf3 Na6 16. dxc5 Nxc5 17. Qxd5 Rc8 18. Rad1 Qf6 19. Qd4 Qxd4 20. Rxd4 Rc7 21. h4 g6 22. Red1 Kg7 23. Bf1 Re8 24. b4 Ne6 25. Rd6 Nf8 26. a4 Re4 27. R6d4 Rxd4 28. Rxd4 Ne6 29. Rd6 Kf6 30. Rd5 Ke7 31. Bb5 Rc1+ 32. Bf1 Rb1 33. b5 Ra1 34. h5 Rxa4 35. Bh3 f5 36. Rd1 Rd4 37. Ra1 Rd7 38. Bf1 gxh5 39. Bc4 Rc7 40. Be2 Nd4 41. Bd3 Kf6 42. Kg2 h4 43. Ra4 Ke5 44. gxh4 Ne6 45. Kh2 Nc5 46. Rc4 Rd7 47. f4+ Ke6 48. Bf1 Rd2+ 49. Kg1 Kd5 50. Rc1 Ke4 51. Bh3 Kxf4 52. Rf1+ Kg3 53. Bxf5 Rg2+ 54. Kh1 Rh2+ 55. Kg1 Rxh4 56. Re1 h6 57. Bc2 Rc4 0-1

[Event "EU-Cup 37th"]
[Site "Mayrhofen"]
[Date "2022.10.04"]
[Round "2.4"]
[White "Maze, Sebastien"]
[Black "Ondersteijn, Niels"]
[Result "1-0"]
[ECO "B07"]
[WhiteElo "2530"]
[BlackElo "2382"]
[PlyCount "117"]
[EventDate "2022.10.03"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "AUT"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]
[WhiteTeam "Viernheim"]
[BlackTeam "Paul Keres"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "NED"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. h3 Bg7 5. Be3 a6 6. g4 h5 7. g5 Nfd7 8. a4 e6 9. f4 0-0 10. Nf3 Nc6 11. Be2 Re8 12. 0-0 d5 13. e5 Ne7 14. a5 Nf5 15. Bf2 Bf8 16. Bd3 Nb8 17. Nb1 Bd7 18. Qe2 Nc6 19. c3 Na7 20. b3 Bb5 21. c4 Bc6 22. Rd1 Bb4 23. Bxf5 exf5 24. Be1 Qe7 25. c5 Bb5 26. Qe3 Nc6 27. Bxb4 Nxb4 28. Na3 Bd7 29. Qc3 Nc6 30. b4 Nd8 31. e6 Nxe6 32. Re1 f6 33. gxf6 Qxf6 34. Qd2 Re7 35. Re5 Rae8 36. Kh2 Nd8 37. Rg1 Nc6 38. Nc2 Rg7 39. Ne3 Nxe5 40. dxe5 Qe6 41. Ng5 Qc6 42. Nxd5 Kh8 43. Nf6 Rf8 44. Qd4 Be6 45. Rd1 Re7 46. Qc3 b6 47. axb6 cxb6 48. Rd6 Qa4 49. Qd2 Qa2 50. Qxa2 Bxa2 51. Nd7 Rxd7 52. Rxd7 bxc5 53. bxc5 Bc4 54. c6 Bb5 55. Nh7 Bxc6 56. Nxf8 Bxd7 57. Nxd7 h4 58. Nc5 a5 59. Kg2 1-0

[Event "NED-chT 2223"]
[Site "Netherlands"]
[Date "2022.09.17"]
[Round "1.8"]
[White "Ondersteijn, Niels"]
[Black "Roggeveen, Pieter"]
[Result "1-0"]
[ECO "A13"]
[WhiteElo "2382"]
[BlackElo "2215"]
[PlyCount "125"]
[EventDate "2022.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 213 Extra"]
[Source "ChessBase"]
[SourceDate "2023.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.05.31"]
[SourceQuality "1"]
[WhiteTeam "Paul Keres"]
[BlackTeam "Kennemer Combinatie"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. c4 e6 2. g3 d5 3. Nf3 dxc4 4. Qa4+ Bd7 5. Qxc4 c5 6. Bg2 Bc6 7. 0-0 Nd7 8. a4 Ngf6 9. Re1 Be7 10. e4 0-0 11. Nc3 Rc8 12. h3 h6 13. a5 Re8 14. d3 Bf8 15. Nb5 Ra8 16. Bf4 e5 17. Be3 Bxb5 18. Qxb5 Rb8 19. Nd2 Qe7 20. Rec1 a6 21. Qb3 Qe6 22. Qc3 Rbc8 23. Ra4 Rc6 24. Kh2 Rd8 25. Bf3 Be7 26. Bd1 Nf8 27. Rc4 N6d7 28. Qb3 b5 29. axb6 Rxb6 30. Qc3 Rdb8 31. Rb1 Qf6 32. Ra4 Rb4 33. Nc4 Ng6 34. Rba1 Rxa4 35. Rxa4 Ra8 36. Qa3 Qc6 37. Qa2 Ngf8 38. Bb3 Bg5 39. h4 Bxe3 40. Nxe3 Qg6 41. Nf5 Qf6 42. Bxf7+ Kh7 43. Bg8+ Kh8 44. Qf7 Rb8 45. b3 Rb6 46. Kg2 Nb8 47. Ra5 Qxf7 48. Bxf7 Nfd7 49. Bc4 Kh7 50. Kf1 g6 51. Ne3 Kg7 52. Ke2 Nc6 53. Ra3 Nb4 54. Ra1 Kf6 55. f4 exf4 56. gxf4 h5 57. Rg1 Kg7 58. Rg5 Nc6 59. Rd5 Nd4+ 60. Kf2 Nb8 61. Rxc5 Nxb3 62. Rc7+ Kf8 63. Nd5 1-0

[Event "Maastricht Limburg op 14th"]
[Site "Maastricht"]
[Date "2022.06.06"]
[Round "6"]
[White "Ondersteijn, Niels"]
[Black "Nemegeer, Arne"]
[Result "1-0"]
[ECO "B11"]
[WhiteElo "2376"]
[BlackElo "2107"]
[PlyCount "67"]
[EventDate "2022.06.03"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 208 Extra"]
[Source "ChessBase"]
[SourceDate "2022.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.07.31"]
[SourceQuality "1"]

1. e4 c6 2. Nc3 d5 3. Nf3 dxe4 4. Nxe4 Nf6 5. Qe2 Nxe4 6. Qxe4 Qa5 7. Bc4 Bf5 8. Qf4 e6 9. 0-0 Be7 10. d3 0-0 11. Bd2 Qd8 12. a4 Nd7 13. a5 a6 14. g4 Bg6 15. h4 h5 16. g5 Qb8 17. Qxb8 Raxb8 18. Bf4 Rbc8 19. Rfe1 Bc5 20. Kg2 Rfe8 21. c3 Bf5 22. d4 Be7 23. b4 Nf8 24. Nd2 f6 25. gxf6 Bxf6 26. Bg3 Ng6 27. Ne4 Be7 28. Re3 Rcd8 29. Nc5 Nxh4+ 30. Bxh4 Bxh4 31. Nxb7 Bg5 32. Re5 Rd5 33. Bxd5 cxd5 34. Nd6 1-0

[Event "Maastricht Limburg op 14th"]
[Site "Maastricht"]
[Date "2022.06.06"]
[Round "7"]
[White "Pauly, Carlo"]
[Black "Ondersteijn, Niels"]
[Result "0-1"]
[ECO "E94"]
[WhiteElo "2305"]
[BlackElo "2376"]
[PlyCount "92"]
[EventDate "2022.06.03"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 208 Extra"]
[Source "ChessBase"]
[SourceDate "2022.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.07.31"]
[SourceQuality "1"]

1. d4 d6 2. Nf3 Nf6 3. c4 g6 4. Nc3 Bg7 5. e4 0-0 6. Be2 Nbd7 7. 0-0 e5 8. Be3 Qe7 9. d5 c5 10. Ne1 Kh8 11. Nd3 Ng8 12. Qd2 f5 13. exf5 gxf5 14. f4 e4 15. Nf2 Ndf6 16. a3 b6 17. b4 h5 18. h3 Nh6 19. bxc5 bxc5 20. Rfb1 Rg8 21. Ra2 Kh7 22. Bd1 Bh8 23. Nh1 Nd7 24. Rc1 Rb8 25. Qf2 Ba6 26. Nb5 Bxb5 27. cxb5 Nf6 28. Rd2 Rxb5 29. Qh4 Qf7 30. Ng3 Nxd5 31. Bxh5 Qf6 32. Qxf6 Nxf6 33. Be2 Rxg3 34. Bxb5 Rxe3 35. Rxd6 Nh5 36. Rxc5 Nxf4 37. Rc7+ Bg7 38. Rxa7 Rg3 39. Bf1 e3 40. Kh2 e2 41. Bxe2 Rxg2+ 42. Kh1 Rxe2 43. Rdd7 Nh5 44. a4 f4 45. Rd3 Nf5 46. Kg1 Ne3 0-1

[Event "Maastricht Limburg op 14th"]
[Site "Maastricht"]
[Date "2022.06.05"]
[Round "5"]
[White "Kucharska, Honorata"]
[Black "Ondersteijn, Niels"]
[Result "0-1"]
[ECO "E62"]
[WhiteElo "2181"]
[BlackElo "2376"]
[PlyCount "128"]
[EventDate "2022.06.03"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 208 Extra"]
[Source "ChessBase"]
[SourceDate "2022.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.07.31"]
[SourceQuality "1"]

1. d4 d6 2. Nf3 Nf6 3. g3 g6 4. Bg2 Bg7 5. c4 0-0 6. 0-0 Nc6 7. Nc3 e5 8. dxe5 Nxe5 9. Nxe5 dxe5 10. Qc2 c6 11. Rd1 Qc7 12. Bg5 Be6 13. c5 h6 14. Bxf6 Bxf6 15. Ne4 Be7 16. Nd6 Rfd8 17. Qd2 Kh7 18. h4 Rd7 19. h5 Rad8 20. hxg6+ fxg6 21. Qe3 Bxd6 22. cxd6 Rxd6 23. Rxd6 Rxd6 24. Qxa7 Rd2 25. Rc1 Qd7 26. Qe3 Bxa2 27. Qxe5 Qg7 28. Qe3 Qxb2 29. Re1 Qd4 30. Qe7+ Qg7 31. Qe3 Rd7 32. Qa3 Be6 33. Bf3 Qe5 34. Rc1 Bd5 35. Rd1 Be6 36. Rxd7+ Bxd7 37. Qa7 Qc7 38. Qc5 Be8 39. Qe3 Bf7 40. Qc5 Qd7 41. Kg2 Bd5 42. e4 Be6 43. e5 Kg7 44. Kh2 h5 45. Bg2 Kf7 46. Qe3 Kg7 47. Qc5 Qc7 48. f4 Qf7 49. Qd4 Qe7 50. Be4 h4 51. Qd3 Qc5 52. Qd2 hxg3+ 53. Kxg3 Qg1+ 54. Qg2 Qxg2+ 55. Bxg2 Bd5 56. Bf1 b5 57. Kf2 b4 58. Ke3 c5 59. Kd2 Be6 60. Bd3 Kh6 61. Kc2 Kh5 62. Kb2 Kg4 63. Bxg6 Kxf4 64. Bh7 Kxe5 0-1

[Event "Maastricht Limburg op 14th"]
[Site "Maastricht"]
[Date "2022.06.05"]
[Round "4"]
[White "Ondersteijn, Niels"]
[Black "Pham, Khoi"]
[Result "1/2-1/2"]
[ECO "A12"]
[WhiteElo "2376"]
[BlackElo "2244"]
[PlyCount "91"]
[EventDate "2022.06.03"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 208 Extra"]
[Source "ChessBase"]
[SourceDate "2022.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.07.31"]
[SourceQuality "1"]

1. b3 d5 2. Bb2 Bf5 3. Nf3 e6 4. c4 c6 5. g3 h6 6. Bg2 Nf6 7. 0-0 Be7 8. d3 0-0 9. Nbd2 Nbd7 10. a3 a5 11. Ra2 Qc7 12. Qa1 Rfd8 13. Rc1 Qb6 14. Bc3 Qa6 15. cxd5 cxd5 16. a4 Bg6 17. Rac2 Ne8 18. Nd4 Nc5 19. N2f3 Bf6 20. Qa3 Qb6 21. Nb5 Na6 22. Bxf6 Nxf6 23. Ne5 Bh5 24. Qb2 Nb4 25. Rc7 Na6 26. R7c2 Nb4 27. Rc3 Ng4 28. Nxg4 Bxg4 29. Rc7 Nc6 30. h3 Bf5 31. g4 Bg6 32. Qc3 Rac8 33. Rxc8 Rxc8 34. Qc5 Qxc5 35. Rxc5 b6 36. Rc1 Na7 37. Rxc8+ Nxc8 38. f4 Kf8 39. Kf2 Ke7 40. Nd4 Kd6 41. Ke3 Kc5 42. Nc2 Nd6 43. Kd2 b5 44. axb5 Nxb5 45. e3 d4 46. e4 1/2-1/2

[Event "Maastricht Limburg op 14th"]
[Site "Maastricht"]
[Date "2022.06.03"]
[Round "1"]
[White "Bomans, Arno"]
[Black "Ondersteijn, Niels"]
[Result "1-0"]
[ECO "A45"]
[WhiteElo "2241"]
[BlackElo "2376"]
[PlyCount "71"]
[EventDate "2022.06.03"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 208 Extra"]
[Source "ChessBase"]
[SourceDate "2022.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.07.31"]
[SourceQuality "1"]

1. d4 Nf6 2. Bg5 c5 3. Bxf6 gxf6 4. d5 Qb6 5. Qc1 f5 6. c4 Bg7 7. Nc3 d6 8. e3 Qa5 9. Nf3 a6 10. Be2 Nd7 11. 0-0 Nf6 12. Qc2 Bd7 13. Nh4 b5 14. Nxf5 Bxf5 15. Qxf5 bxc4 16. Bxc4 Rb8 17. Rac1 h5 18. Rc2 h4 19. Be2 Nd7 20. Ne4 Bxb2 21. Ng5 Bf6 22. Nxf7 Kxf7 23. Qxd7 Rb4 24. Qf5 Qa4 25. a3 Re4 26. Bh5+ Kf8 27. Rb2 Rh6 28. Bd1 Qc4 29. Be2 Qa4 30. Rb8+ Kf7 31. Qc8 Bg7 32. Bd1 Qc4 33. Qf5+ Bf6 34. Bb3 Qd3 35. Rd1 Rxe3 36. Qxd3 1-0

[Event "Utrecht Keres Memorial"]
[Site "Utrecht"]
[Date "2022.05.29"]
[Round "6"]
[White "Van Doren, Bas"]
[Black "Ondersteijn, Niels"]
[Result "1/2-1/2"]
[ECO "B09"]
[WhiteElo "2102"]
[BlackElo "2376"]
[PlyCount "91"]
[EventDate "2022.05.27"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 208 Extra"]
[Source "ChessBase"]
[SourceDate "2022.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.07.31"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 0-0 6. e5 dxe5 7. fxe5 Nd5 8. Bc4 Nxc3 9. bxc3 c5 10. 0-0 Bg4 11. Be3 Nc6 12. Qd2 Qa5 13. Ng5 cxd4 14. cxd4 Qxd2 15. Bxd2 Nxd4 16. Nxf7 Be6 17. Bxe6 Nxe6 18. Nh6+ Bxh6 19. Bxh6 Rxf1+ 20. Kxf1 g5 21. h4 Rc8 22. hxg5 Rxc2 23. g6 hxg6 24. Be3 b6 25. a4 Nc5 26. Rd1 Kf7 27. a5 bxa5 28. Rd5 Nb3 29. Rd7 a6 30. Bg5 Ke6 31. Ra7 Kxe5 32. Bxe7 Rc6 33. Ke2 Nd4+ 34. Kd3 Nb5 35. Ra8 a4 36. Bf8 Kf4 37. Re8 Kg3 38. Re2 Rc3+ 39. Kd2 a3 40. Bd6+ Kg4 41. Re4+ Kf5 42. Re5+ Kg4 43. Rxb5 axb5 44. Kxc3 b4+ 45. Kb3 Kh4 46. Be5 1/2-1/2

[Event "Utrecht Keres Memorial"]
[Site "Utrecht"]
[Date "2022.05.27"]
[Round "1"]
[White "Wagenvoorde, Guido"]
[Black "Ondersteijn, Niels"]
[Result "1/2-1/2"]
[ECO "D85"]
[WhiteElo "2090"]
[BlackElo "2376"]
[PlyCount "106"]
[EventDate "2022.05.27"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 208 Extra"]
[Source "ChessBase"]
[SourceDate "2022.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.07.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 c5 7. Be3 Bg7 8. Qd2 cxd4 9. cxd4 Nc6 10. Rd1 0-0 11. h3 e5 12. d5 Nd4 13. Bd3 f5 14. Ne2 Nxe2 15. Qxe2 f4 16. Bd2 f3 17. gxf3 Qh4 18. Qe3 Bd7 19. Be2 h6 20. Qb3 b6 21. Be3 Rf6 22. Rc1 Bf8 23. Rc7 Rd6 24. Kd2 Be7 25. Qc3 Rxd5+ 26. Ke1 Kf8 27. Bxh6+ Ke8 28. Bg5 Qxg5 29. exd5 a5 30. a3 Bc5 31. h4 Qe7 32. h5 Qd6 33. Rxd7 Kxd7 34. Bb5+ Kc7 35. hxg6 Qxg6 36. Qxe5+ Bd6 37. Qc3+ Bc5 38. d6+ Kb7 39. Bd3 Re8+ 40. Kd2 Qxd6 41. Rh7+ Kb8 42. Qg7 Qf4+ 43. Kc2 Qa4+ 44. Kd2 Qf4+ 45. Kc2 Re7 46. Qg8+ Ka7 47. Be4 Qb8 48. Rxe7+ Bxe7 49. Qxb8+ Kxb8 50. a4 Bc5 51. Kd3 Bxf2 52. f4 Kc7 53. Kc4 Kd6 1/2-1/2

[Event "Bruges Masters op"]
[Site "Bruges"]
[Date "2021.08.20"]
[Round "9"]
[White "Roebers, Eline"]
[Black "Ondersteijn, Niels"]
[Result "1-0"]
[ECO "B07"]
[WhiteElo "2173"]
[BlackElo "2376"]
[PlyCount "71"]
[EventDate "2021.08.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BEL"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be3 a6 5. Qd2 b5 6. Bd3 Bb7 7. f3 Nbd7 8. a4 b4 9. Na2 a5 10. c3 bxc3 11. Nxc3 Bg7 12. Nge2 0-0 13. 0-0 c5 14. Bb5 Qc7 15. Rac1 Rfc8 16. Rfd1 cxd4 17. Nxd4 Nc5 18. Bc4 Nfd7 19. Ba2 Qd8 20. Ndb5 Nb6 21. b3 Nbd7 22. Bg5 Na6 23. b4 Bxc3 24. Rxc3 Rxc3 25. Qxc3 Qf8 26. bxa5 Nac5 27. Qd2 Kh8 28. Bh6 Qd8 29. Bxf7 Qxa5 30. Qd4+ e5 31. Qxd6 Qb6 32. Qxb6 Nxb6 33. Nc7 Rc8 34. a5 Na8 35. Nb5 Bc6 36. Na7 1-0

[Event "Bruges Masters op"]
[Site "Bruges"]
[Date "2021.08.18"]
[Round "7"]
[White "Carlstedt, Jonathan"]
[Black "Ondersteijn, Niels"]
[Result "1-0"]
[ECO "A49"]
[WhiteElo "2442"]
[BlackElo "2376"]
[PlyCount "116"]
[EventDate "2021.08.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BEL"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. g3 c5 4. dxc5 Qa5+ 5. Nc3 Bg7 6. Bd2 Qxc5 7. Bg2 d5 8. Be3 Qa5 9. 0-0 Nc6 10. Nd4 0-0 11. Nb3 Qd8 12. Bc5 Re8 13. Ba3 Ne5 14. Nxd5 Nxd5 15. Qxd5 Qxd5 16. Bxd5 e6 17. Bg2 Nc4 18. Bc5 Nxb2 19. a4 Bd7 20. a5 Bc6 21. Bxc6 bxc6 22. a6 Reb8 23. Ra2 Rb5 24. Rb1 Nc4 25. Rd1 Bf8 26. Bxf8 Kxf8 27. Rd7 Ke8 28. Rc7 Nd6 29. Ra4 Kd8 30. Rxc6 Kd7 31. Rc3 Rc8 32. Rxc8 Kxc8 33. Kf1 Kc7 34. e4 e5 35. Ke2 Kb6 36. Kd3 Ne8 37. Ra3 Kc6 38. Na5+ Kd7 39. Nc4 Nc7 40. Ra1 f6 41. h4 Rc5 42. h5 gxh5 43. Ne3 Ke6 44. c4 Rc6 45. Nd5 Ne8 46. f4 exf4 47. gxf4 Nd6 48. Ne3 h4 49. Kd4 h3 50. Rh1 Rxa6 51. Rxh3 Ra2 52. f5+ Kd7 53. Rxh7+ Kc6 54. Rh4 a5 55. Nd5 Rd2+ 56. Kc3 Rd1 57. Nxf6 Rc1+ 58. Kd3 Rxc4 1-0

[Event "Bruges Masters op"]
[Site "Bruges"]
[Date "2021.08.17"]
[Round "6"]
[White "Ondersteijn, Niels"]
[Black "Vallet, Marc"]
[Result "1-0"]
[ECO "A36"]
[WhiteElo "2376"]
[BlackElo "2181"]
[PlyCount "95"]
[EventDate "2021.08.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BEL"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. c4 c5 2. g3 g6 3. Bg2 Bg7 4. Nc3 Nc6 5. d3 d6 6. e4 e6 7. Nge2 Nge7 8. Be3 Nd4 9. Qd2 Rb8 10. Rb1 a5 11. 0-0 h5 12. a3 Nec6 13. h3 b6 14. f4 f5 15. exf5 exf5 16. Nb5 0-0 17. Bxd4 Nxd4 18. Nexd4 Bxd4+ 19. Nxd4 cxd4 20. Qf2 Qf6 21. b4 Bd7 22. Rfe1 h4 23. gxh4 Kg7 24. Qg3 Ba4 25. Re2 Rbe8 26. Rbe1 Rxe2 27. Rxe2 Re8 28. Rxe8 Bxe8 29. bxa5 bxa5 30. Qe1 Kf8 31. Qf2 Ke7 32. Kh2 Kf8 33. Kg3 Bd7 34. Qb2 Qe7 35. Qxd4 Qe1+ 36. Kh2 Ke7 37. Qg7+ Kd8 38. Qxg6 Kc7 39. Qg3 Qc3 40. h5 Qxa3 41. h6 Qb2 42. h7 Qd4 43. Qh4 Qh8 44. c5 dxc5 45. Qe7 Kc8 46. Qxc5+ Kd8 47. Qxa5+ Kc8 48. Qa8+ 1-0

[Event "Bruges Masters op"]
[Site "Bruges"]
[Date "2021.08.14"]
[Round "1"]
[White "Bertram, Johannes"]
[Black "Ondersteijn, Niels"]
[Result "1-0"]
[ECO "B07"]
[WhiteElo "1936"]
[BlackElo "2376"]
[PlyCount "51"]
[EventDate "2021.08.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BEL"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bg5 Bg7 5. Qd2 h6 6. Bf4 a6 7. 0-0-0 b5 8. f3 Nbd7 9. g4 Bb7 10. h3 c5 11. dxc5 Nxc5 12. e5 b4 13. Nb1 Nd5 14. Bc4 Nxf4 15. Qxf4 0-0 16. exd6 Na4 17. c3 bxc3 18. Nxc3 Nxc3 19. bxc3 Qa5 20. Ne2 exd6 21. Rxd6 Be5 22. Rxg6+ Bg7 23. Qd4 Qa3+ 24. Kc2 Be4+ 25. fxe4 Qa4+ 26. Kb2 1-0

[Event "NED-chT Promotion Meesterklasse"]
[Site "Netherlands"]
[Date "2021.06.26"]
[Round "1.1"]
[White "Caessens, Rob"]
[Black "Ondersteijn, Niels"]
[Result "0-1"]
[ECO "A48"]
[WhiteElo "2264"]
[BlackElo "2372"]
[PlyCount "62"]
[EventDate "2021.06.26"]
[EventType "team-match"]
[EventRounds "1"]
[EventCountry "NED"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]
[WhiteTeam "Zuid Limburg"]
[BlackTeam "Paul Keres"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. Nf3 g6 3. Bg5 Bg7 4. Nbd2 c5 5. e3 d6 6. c3 0-0 7. Bxf6 Bxf6 8. dxc5 dxc5 9. Ne4 Qb6 10. Qb3 Be6 11. Nxf6+ exf6 12. Qc2 Nc6 13. Be2 Rfd8 14. 0-0 Rd7 15. Rfd1 Rad8 16. Rxd7 Rxd7 17. h3 Kg7 18. Rd1 Rxd1+ 19. Bxd1 Bxa2 20. b3 Qa5 21. Nd2 b5 22. f4 c4 23. b4 Qa3 24. Bf3 Bb3 25. Qe4 Qc1+ 26. Nf1 Nxb4 27. Qd4 Na2 28. Qxa7 Nxc3 29. Bc6 Qe1 30. Be8 Ne2+ 31. Kh2 c3 0-1

[Event "Cannes op 34th"]
[Site "Cannes"]
[Date "2020.02.18"]
[Round "3"]
[White "Barseghyan, Harutyun"]
[Black "Ondersteijn, Niels"]
[Result "1-0"]
[ECO "A48"]
[WhiteElo "2448"]
[BlackElo "2389"]
[PlyCount "119"]
[EventDate "2020.02.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "FRA"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. Nbd2 c5 4. dxc5 Qa5 5. a3 Qxc5 6. b4 Qc7 7. Bb2 Bg7 8. c4 0-0 9. e3 a5 10. Be2 d6 11. 0-0 Bg4 12. h3 Bxf3 13. Bxf3 axb4 14. axb4 Rxa1 15. Qxa1 Na6 16. Bc3 Rc8 17. Rb1 Ne8 18. Bd4 Nb8 19. c5 dxc5 20. bxc5 Nc6 21. Bxg7 Nxg7 22. Nc4 Ne6 23. Rb5 Rb8 24. Bd5 Ncd8 25. Qa7 Rc8 26. Nb6 Nc6 27. Qa1 Rd8 28. Bxe6 fxe6 29. Nc4 Rd5 30. f4 Nd8 31. Qa5 Qxa5 32. Nxa5 b6 33. c6 Nxc6 34. Rxd5 Nxa5 35. Rb5 Nc4 36. Kf2 h5 37. Rb4 b5 38. Rxb5 Nd6 39. Re5 Kf7 40. e4 Nc4 41. Rc5 Nd6 42. Ke3 Ne8 43. g3 Nf6 44. Kd4 Nh7 45. Rc8 Kg7 46. Re8 Kf7 47. Rd8 Kg7 48. g4 hxg4 49. hxg4 g5 50. Ke5 gxf4 51. Kxf4 Kf6 52. g5+ Kf7 53. Kg4 Kg6 54. Rg8+ Kf7 55. Rd8 Kg6 56. Ra8 Kf7 57. Kh5 Nf8 58. Rxf8+ Kxf8 59. Kg6 e5 60. Kh7 1-0

[Event "Prague Summer op-A 6th"]
[Site "Prague"]
[Date "2019.08.09"]
[Round "9"]
[White "Toman, Ondrej"]
[Black "Ondersteijn, Niels"]
[Result "1/2-1/2"]
[ECO "B07"]
[WhiteElo "2235"]
[BlackElo "2397"]
[PlyCount "52"]
[EventDate "2019.08.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "CBM 191 Extra"]
[Source "ChessBase"]
[SourceDate "2019.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2019.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. Bf4 g6 3. Nc3 d6 4. e4 c6 5. Qd2 Qa5 6. Nf3 Bg7 7. e5 dxe5 8. Nxe5 Be6 9. Bc4 Nd5 10. Nxd5 Qxd2+ 11. Kxd2 Bxd5 12. Bxd5 cxd5 13. Rhe1 Nd7 14. Re2 Rc8 15. c3 e6 16. Nd3 0-0 17. g4 a5 18. a4 Nb6 19. b3 Nd7 20. Be5 Nxe5 21. Nxe5 Bh6+ 22. Kd3 Rc7 23. Raa2 f6 24. Nf3 Kf7 25. Rac2 Bf4 26. c4 dxc4+ 1/2-1/2

[Event "Prague Summer op-A 6th"]
[Site "Prague"]
[Date "2019.08.07"]
[Round "7"]
[White "Dushyant, Sharma"]
[Black "Ondersteijn, Niels"]
[Result "0-1"]
[ECO "C41"]
[WhiteElo "2228"]
[BlackElo "2397"]
[PlyCount "96"]
[EventDate "2019.08.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "CBM 191 Extra"]
[Source "ChessBase"]
[SourceDate "2019.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2019.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Qd2 0-0 8. 0-0-0 Nc6 9. f3 Nxd4 10. Bxd4 Be6 11. Kb1 c5 12. Be3 b5 13. Bh6 b4 14. Nd5 Bxd5 15. exd5 Re8 16. Bb5 Re5 17. Bc6 Bxh6 18. Qxh6 Rc8 19. Rhe1 Rxe1 20. Rxe1 Rc7 21. Qe3 Kf8 22. Qh6+ Kg8 23. Qe3 Kg7 24. h4 Ng8 25. Qf2 Re7 26. Rd1 Re5 27. f4 Qf6 28. Qf3 Re7 29. h5 Nh6 30. hxg6 fxg6 31. Rh1 Qh4 32. g3 Re3 33. Qf1 Qxg3 34. b3 Nf5 35. Rg1 Rf3 36. Qd1 Qxf4 37. Bb5 Ne3 38. Qc1 Nxd5 39. Bc6 Nc3+ 40. Kb2 Qd4 41. Bxf3 Ne2+ 42. Kb1 Nxc1 43. Rxc1 g5 44. Rd1 Qf4 45. Bd5 g4 46. Re1 Qd2 47. Re7+ Kf6 48. Rf7+ Kg6 0-1

[Event "Prague Summer op-A 6th"]
[Site "Prague"]
[Date "2019.08.06"]
[Round "6"]
[White "Ondersteijn, Niels"]
[Black "Brejnik, Gustav"]
[Result "1-0"]
[ECO "A23"]
[WhiteElo "2397"]
[BlackElo "2190"]
[PlyCount "109"]
[EventDate "2019.08.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "CBM 191 Extra"]
[Source "ChessBase"]
[SourceDate "2019.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2019.09.30"]
[SourceQuality "1"]

1. c4 e5 2. g3 c6 3. Nf3 e4 4. Nd4 d5 5. cxd5 cxd5 6. d3 Nf6 7. Nc3 Bc5 8. Nb3 Bb4 9. a3 Bxc3+ 10. bxc3 Qc7 11. c4 exd3 12. Bf4 Qe7 13. Qxd3 dxc4 14. Qxc4 0-0 15. Bg2 Be6 16. Qc5 Qxc5 17. Nxc5 Bd5 18. Bxd5 Nxd5 19. Nxb7 Nxf4 20. gxf4 Nd7 21. 0-0 Rab8 22. Rfb1 Nb6 23. Na5 Nd5 24. Rxb8 Rxb8 25. Nc6 Rb6 26. Rd1 Rxc6 27. Rxd5 g6 28. Ra5 a6 29. h4 h5 30. f5 Kg7 31. fxg6 fxg6 32. Kg2 Kf6 33. Kf3 Ke6 34. Kf4 Kf6 35. e4 Rb6 36. f3 Rc6 37. a4 Rb6 38. Rc5 Ke6 39. a5 Rd6 40. Rc7 Rd1 41. Rc6+ Kf7 42. Rxa6 Ra1 43. Ke5 Ke7 44. Ra7+ Kd8 45. f4 Ra4 46. f5 gxf5 47. exf5 Rxh4 48. f6 Ke8 49. a6 Ra4 50. Re7+ Kf8 51. a7 Ra5+ 52. Kf4 Ra4+ 53. Kg5 Ra1 54. Rb7 Rg1+ 55. Kh6 1-0

[Event "Prague Summer op-A 6th"]
[Site "Prague"]
[Date "2019.08.05"]
[Round "5"]
[White "Thakur, Akash"]
[Black "Ondersteijn, Niels"]
[Result "1-0"]
[ECO "C41"]
[WhiteElo "2273"]
[BlackElo "2397"]
[PlyCount "83"]
[EventDate "2019.08.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "CBM 191 Extra"]
[Source "ChessBase"]
[SourceDate "2019.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2019.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 Nf6 5. Nc3 Be7 6. Be2 0-0 7. 0-0 Re8 8. Re1 Bf8 9. Bf1 Nbd7 10. Bg5 c6 11. Qd2 h6 12. Bh4 Ne5 13. f3 g5 14. Bf2 Nh5 15. Rad1 Qf6 16. Nce2 Bd7 17. Ng3 Nf4 18. Be3 h5 19. Ndf5 h4 20. Bxf4 gxf4 21. Ne2 Bxf5 22. exf5 d5 23. Kh1 Nc4 24. Qxf4 Ne3 25. Ng3 Nxd1 26. Nh5 Qh6 27. Qxh6 Bxh6 28. Nf6+ Kf8 29. Nxe8 Ne3 30. Nf6 Nxc2 31. Nd7+ Kg8 32. Re7 Bg5 33. f6 Rd8 34. f4 Bxf4 35. Bd3 Ne3 36. Bg6 Ng4 37. Bxf7+ Kh8 38. Bg6 Nh6 39. Rh7+ Kg8 40. f7+ Nxf7 41. Nf6+ Kf8 42. Rxf7# 1-0

[Event "Prague Summer op-A 6th"]
[Site "Prague"]
[Date "2019.08.04"]
[Round "3"]
[White "Henriksen, Geir Ivar"]
[Black "Ondersteijn, Niels"]
[Result "0-1"]
[ECO "A37"]
[WhiteElo "2154"]
[BlackElo "2397"]
[PlyCount "46"]
[EventDate "2019.08.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "CBM 191 Extra"]
[Source "ChessBase"]
[SourceDate "2019.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2019.09.30"]
[SourceQuality "1"]

1. c4 c5 2. g3 g6 3. Bg2 Bg7 4. Nc3 Nc6 5. Nf3 d6 6. 0-0 e5 7. d3 Nge7 8. a3 0-0 9. Rb1 a5 10. Ne1 Be6 11. Nc2 d5 12. cxd5 Nxd5 13. Nxd5 Bxd5 14. Bxd5 Qxd5 15. a4 Rfd8 16. Bg5 Rd7 17. Ne3 Qe6 18. Nc2 Re8 19. Be3 e4 20. Bxc5 Rd5 21. Be3 Qh3 22. f4 exf3 23. exf3 Ne5 0-1

[Event "Prague Summer op-A 6th"]
[Site "Prague"]
[Date "2019.08.04"]
[Round "4"]
[White "Ondersteijn, Niels"]
[Black "Ahn, Hongjin"]
[Result "1-0"]
[ECO "A13"]
[WhiteElo "2397"]
[BlackElo "2238"]
[PlyCount "71"]
[EventDate "2019.08.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "CBM 191 Extra"]
[Source "ChessBase"]
[SourceDate "2019.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2019.09.30"]
[SourceQuality "1"]

1. c4 e6 2. g3 g6 3. Bg2 Bg7 4. Nf3 Ne7 5. d4 0-0 6. 0-0 d5 7. e3 Nbc6 8. Nc3 b6 9. cxd5 exd5 10. b3 Bb7 11. Bb2 Nf5 12. Rc1 Nce7 13. Re1 Nd6 14. Qc2 Re8 15. a4 a6 16. a5 b5 17. Ba3 f6 18. Nd2 Ndf5 19. Ne2 c6 20. Bb4 Bh6 21. Nf4 Bxf4 22. exf4 Nxd4 23. Qc3 Nef5 24. g4 Qc7 25. gxf5 Qxf4 26. Ne4 dxe4 27. Qxd4 Rad8 28. Qxf6 Qxf5 29. Bc3 Qxf6 30. Bxf6 Rd6 31. Bg5 Rde6 32. Red1 Re5 33. Be3 R8e7 34. b4 Rd5 35. Rd4 Red7 36. Rcd1 1-0

[Event "Prague Summer op-A 6th"]
[Site "Prague"]
[Date "2019.08.03"]
[Round "2"]
[White "Ondersteijn, Niels"]
[Black "Beukes, Dante M"]
[Result "1/2-1/2"]
[ECO "A01"]
[WhiteElo "2397"]
[BlackElo "2130"]
[PlyCount "119"]
[EventDate "2019.08.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "CBM 191 Extra"]
[Source "ChessBase"]
[SourceDate "2019.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2019.09.30"]
[SourceQuality "1"]

1. b3 e5 2. Bb2 Nc6 3. e3 d5 4. Bb5 Bd6 5. f4 f6 6. Qh5+ g6 7. Qh4 Bd7 8. Nf3 exf4 9. 0-0 Nce7 10. Bxd7+ Qxd7 11. exf4 0-0-0 12. Nc3 Nf5 13. Qf2 d4 14. Ne2 Bc5 15. Nc1 Bb6 16. Nd3 Nge7 17. a4 Nc6 18. Ba3 a5 19. Rfe1 Qd5 20. Qe2 Ng7 21. Qf2 Nf5 22. Re2 Rhe8 23. Rae1 Rxe2 24. Qxe2 Ng7 25. Qf2 Re8 26. Qh4 Rxe1+ 27. Nfxe1 Nh5 28. Kf1 Qe4 29. Nf3 Nd8 30. Qe1 Qxe1+ 31. Kxe1 Ne6 32. g3 Kd7 33. Ke2 Kc6 34. Nh4 Bc5 35. Bb2 Nhg7 36. Kf3 Kd5 37. g4 c6 38. c4+ dxc3 39. dxc3 b5 40. f5 Ng5+ 41. Ke2 gxf5 42. gxf5 Ne4 43. c4+ bxc4 44. Nf4+ Kd6 45. bxc4 Ke7 46. Nd3 Bb6 47. Nc1 Kf7 48. Nb3 Ne8 49. Kd3 Nf2+ 50. Kc2 Ne4 51. Bd4 Bxd4 52. Nxd4 N8d6 53. Nxc6 Nxc4 54. Kd3 Ned6 55. Kd4 Nb2 56. Kc5 Ne4+ 57. Kd5 Nc3+ 58. Kd6 Ne4+ 59. Kd5 Nc3+ 60. Kd6 1/2-1/2

[Event "Prague Summer op-A 6th"]
[Site "Prague"]
[Date "2019.08.02"]
[Round "1"]
[White "Unander, Matts"]
[Black "Ondersteijn, Niels"]
[Result "0-1"]
[ECO "C41"]
[WhiteElo "2017"]
[BlackElo "2397"]
[PlyCount "32"]
[EventDate "2019.08.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "CBM 191 Extra"]
[Source "ChessBase"]
[SourceDate "2019.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2019.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 Nf6 5. Nc3 Be7 6. Be2 0-0 7. 0-0 Re8 8. Re1 Bf8 9. Bf3 Nbd7 10. g3 Ne5 11. Bg2 Bg4 12. f3 c5 13. fxg4 cxd4 14. Ne2 d5 15. exd5 Nexg4 16. Bf3 Qb6 0-1

[Event "Utrecht OKU op 46th"]
[Site "Utrecht"]
[Date "2019.06.02"]
[Round "5"]
[White "Beerdsen, Thomas"]
[Black "Ondersteijn, Niels"]
[Result "1-0"]
[ECO "C41"]
[WhiteElo "2488"]
[BlackElo "2395"]
[PlyCount "71"]
[EventDate "2019.05.31"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 190 Extra"]
[Source "ChessBase"]
[SourceDate "2019.07.15"]
[SourceVersion "1"]
[SourceVersionDate "2019.07.15"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 Nf6 5. Nc3 Be7 6. g3 d5 7. e5 Ng4 8. Bg2 0-0 9. 0-0 c5 10. Ndb5 d4 11. Nd5 Nc6 12. f4 Nh6 13. Bd2 a6 14. Nxe7+ Qxe7 15. Nd6 Bg4 16. Qe1 f6 17. b4 cxb4 18. Bxb4 fxe5 19. Bxc6 bxc6 20. Nf5 Qd7 21. Nxh6+ gxh6 22. Bxf8 Rxf8 23. fxe5 Bf5 24. Rf4 Rf7 25. Qb4 d3 26. cxd3 Qxd3 27. Re1 Qd5 28. Ref1 Be6 29. Rxf7 Bxf7 30. Qg4+ Kh8 31. Rd1 Qxe5 32. Rd8+ Be8 33. Qd4 Qxd4+ 34. Rxd4 Bg6 35. Kf2 Kg7 36. Ke3 1-0

[Event "Utrecht OKU op 46th"]
[Site "Utrecht"]
[Date "2019.06.02"]
[Round "6"]
[White "Ondersteijn, Niels"]
[Black "Schouten, Jordy"]
[Result "1-0"]
[ECO "D34"]
[WhiteElo "2395"]
[BlackElo "2094"]
[PlyCount "77"]
[EventDate "2019.05.31"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 190 Extra"]
[Source "ChessBase"]
[SourceDate "2019.07.15"]
[SourceVersion "1"]
[SourceVersionDate "2019.07.15"]
[SourceQuality "1"]

1. c4 e6 2. g3 d5 3. Bg2 c5 4. Nf3 Nc6 5. 0-0 Nf6 6. cxd5 exd5 7. d4 Be7 8. Nc3 0-0 9. b3 Ne4 10. Bb2 f5 11. dxc5 Be6 12. Na4 f4 13. Nd4 Nxd4 14. Bxd4 Qe8 15. Nc3 Qh5 16. Nxe4 dxe4 17. Qc2 Bf5 18. Bxe4 Rae8 19. Qc4+ Kh8 20. Bxb7 Bd8 21. Qc3 Rf7 22. Bf3 Bg4 23. Bxg4 Qxg4 24. Qf3 Qg6 25. g4 h5 26. g5 Rfe7 27. h4 Rxe2 28. Rad1 Rxa2 29. Rfe1 Rf8 30. b4 Ra4 31. Bc3 Ra3 32. Bxg7+ Qxg7 33. Qxa3 f3 34. Rxd8 Rxd8 35. Qxf3 Rd4 36. Qxh5+ Kg8 37. Re8+ Qf8 38. Qg6+ Kh8 39. Rxf8# 1-0

[Event "Utrecht OKU op 46th"]
[Site "Utrecht"]
[Date "2019.06.01"]
[Round "4"]
[White "Ondersteijn, Niels"]
[Black "Pham, Khoi"]
[Result "1-0"]
[ECO "A26"]
[WhiteElo "2395"]
[BlackElo "2172"]
[PlyCount "67"]
[EventDate "2019.05.31"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 190 Extra"]
[Source "ChessBase"]
[SourceDate "2019.07.15"]
[SourceVersion "1"]
[SourceVersionDate "2019.07.15"]
[SourceQuality "1"]

1. c4 g6 2. g3 Bg7 3. Bg2 e5 4. Nc3 d6 5. e4 Nc6 6. d3 f5 7. Nge2 Nf6 8. 0-0 0-0 9. Nd5 h6 10. Rb1 Nh5 11. exf5 Bxf5 12. b4 Qd7 13. b5 Nd8 14. Be3 Nf7 15. Nb4 Bh3 16. Bxb7 Bxf1 17. Qxf1 Rab8 18. Bc6 Qg4 19. h3 Qe6 20. Bxa7 Rbc8 21. Be3 Kh8 22. a4 e4 23. Bxe4 Ne5 24. Qg2 g5 25. Nd4 Qd7 26. a5 Nf4 27. gxf4 gxf4 28. Bd2 Rg8 29. Bf5 Nf3+ 30. Kh1 Bxd4 31. Bxd7 Rxg2 32. Kxg2 Nh4+ 33. Kh1 Rd8 34. Nc6 1-0

[Event "Karlsruhe Grenke op"]
[Site "Karlsruhe"]
[Date "2019.04.22"]
[Round "9"]
[White "Hoffmann, Hendrik"]
[Black "Ondersteijn, Niels"]
[Result "0-1"]
[ECO "C41"]
[WhiteElo "2258"]
[BlackElo "2390"]
[PlyCount "52"]
[EventDate "2019.04.18"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 Nf6 5. Nc3 Be7 6. Bf4 0-0 7. Qd2 Nc6 8. 0-0-0 Nxd4 9. Qxd4 a6 10. f3 b5 11. g4 c5 12. Qg1 b4 13. Nd5 Nxd5 14. exd5 a5 15. h4 b3 16. cxb3 a4 17. g5 axb3 18. a3 Bf5 19. Bd2 Rxa3 20. bxa3 Bf6 21. gxf6 Qxf6 22. Ba5 Qa1+ 23. Kd2 Qb2+ 24. Ke3 Re8+ 25. Kf4 Qe5+ 26. Kg5 Bc8# 0-1

[Event "Karlsruhe Grenke op"]
[Site "Karlsruhe"]
[Date "2019.04.22"]
[Round "8"]
[White "Ondersteijn, Niels"]
[Black "Kunin, Vitaly L"]
[Result "0-1"]
[ECO "A10"]
[WhiteElo "2390"]
[BlackElo "2520"]
[PlyCount "72"]
[EventDate "2019.04.18"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]

1. c4 b6 2. e4 Bb7 3. Nc3 e5 4. Nf3 Nc6 5. g3 Bc5 6. Bg2 Nge7 7. 0-0 0-0 8. a3 a5 9. d3 d6 10. Na4 Nd4 11. Rb1 Nxf3+ 12. Bxf3 Bd4 13. Be3 Qd7 14. Nc3 Bxc3 15. bxc3 f5 16. c5 f4 17. cxd6 Qxd6 18. Bc1 Ba6 19. c4 Rad8 20. gxf4 exf4 21. Rb3 Bxc4 22. dxc4 Qg6+ 23. Kh1 Rxd1 24. Rxd1 Nc6 25. Bb2 Qe6 26. e5 Ne7 27. Bd5 Nxd5 28. cxd5 Qf5 29. Rbd3 f3 30. e6 g6 31. Rc3 Rd8 32. e7 Re8 33. Rxc7 Qg5 34. Rg1 Qxd5 35. Re1 Qd2 36. Bc3 Qxf2 0-1

[Event "Karlsruhe Grenke op"]
[Site "Karlsruhe"]
[Date "2019.04.21"]
[Round "6"]
[White "Ondersteijn, Niels"]
[Black "Rahul, Kumar Pune"]
[Result "1-0"]
[ECO "A21"]
[WhiteElo "2390"]
[BlackElo "2216"]
[PlyCount "135"]
[EventDate "2019.04.18"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]

1. c4 g6 2. g3 Bg7 3. Bg2 e5 4. Nc3 Ne7 5. d3 d6 6. e4 Nd7 7. Nge2 0-0 8. h4 Nf6 9. Qb3 h6 10. 0-0 Kh7 11. f3 a6 12. Be3 c5 13. a3 Rb8 14. Rab1 Nc6 15. Qd1 Bd7 16. b4 b6 17. b5 axb5 18. Nxb5 Qe7 19. Kh2 Ra8 20. Bh3 Be8 21. Bc1 Ra6 22. Kg2 Na7 23. Nbc3 Nc6 24. Nb5 Na7 25. Nbc3 Nc6 26. g4 Nd4 27. g5 Nh5 28. Bc8 Nxe2 29. Qxe2 Rxa3 30. Nd5 Qd8 31. Bxa3 Qxc8 32. Rxb6 Qe6 33. Bc1 Bd7 34. Rh1 f6 35. gxh6 Bxh6 36. Bxh6 Kxh6 37. Qe3+ Kg7 38. Rb7 Rf7 39. Kf2 f5 40. Nc7 Qf6 41. Nd5 f4 42. Qd2 Qd8 43. Qa2 Ng3 44. Rh2 Be6 45. Qa7 Bxd5 46. cxd5 Rxb7 47. Qxb7+ Kh6 48. Kg2 Nh5 49. Kh3 Qa5 50. Qb8 Kh7 51. Qxd6 Qe1 52. Qe7+ Ng7 53. Qg5 Qf1+ 54. Qg2 Qxd3 55. Qe2 Qb1 56. Qc2 Qg1 57. Qg2 Qd4 58. Qf2 Qa1 59. Kg2 Nh5 60. Rh1 Qa4 61. Qxc5 Qa2+ 62. Qf2 Qa3 63. Rd1 Qd6 64. Qa7+ Kh6 65. Rb1 Nf6 66. Rb8 Nd7 67. Rh8+ Kg7 68. Rd8 1-0

[Event "Karlsruhe Grenke op"]
[Site "Karlsruhe"]
[Date "2019.04.21"]
[Round "7"]
[White "Paltrinieri, Nicholas"]
[Black "Ondersteijn, Niels"]
[Result "0-1"]
[ECO "A45"]
[WhiteElo "2276"]
[BlackElo "2390"]
[PlyCount "96"]
[EventDate "2019.04.18"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]

1. d4 Nf6 2. Bg5 c5 3. Nc3 Qa5 4. Bxf6 gxf6 5. d5 f5 6. e3 Bg7 7. Nge2 d6 8. g3 Nd7 9. Bg2 Nb6 10. 0-0 Nc4 11. Rb1 Nxb2 12. Rxb2 Bxc3 13. Nxc3 Qxc3 14. Rb3 Qf6 15. Re1 h5 16. h4 c4 17. Rb4 Qc3 18. Qa1 Qxb4 19. Qxh8+ Kd7 20. Rd1 Kc7 21. Bh3 f4 22. exf4 Bg4 23. Qxa8 Bxd1 24. Qc8+ Kb6 25. Bf1 Bxc2 26. a3 Qc5 27. Qd8+ Ka6 28. Qxe7 b5 29. Qxf7 c3 30. Qe8 Be4 31. Bxb5+ Kb6 32. Qb8+ Ka5 33. Qb7 Qb6 34. Qc8 Kxb5 35. Qe8+ Kc4 36. Qxe4+ Qd4 37. Qc2 Qd2 38. Qa4+ Kd3 39. Qb5+ Kc2 40. f5 Qe1+ 41. Kg2 Qe4+ 42. f3 Qxf5 43. Qe2+ Kc1 44. Qf1+ Kb2 45. Qb5+ Ka1 46. Qb3 Qd3 47. a4 Qe2+ 48. Kg1 Qb2 0-1

[Event "Karlsruhe Grenke op"]
[Site "Karlsruhe"]
[Date "2019.04.19"]
[Round "3"]
[White "Korobov, Anton"]
[Black "Ondersteijn, Niels"]
[Result "1-0"]
[ECO "D85"]
[WhiteElo "2675"]
[BlackElo "2390"]
[PlyCount "77"]
[EventDate "2019.04.18"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bd2 Bg7 5. cxd5 Nxd5 6. e4 Nb6 7. Be3 0-0 8. Bb5 Be6 9. Nf3 Bg4 10. a4 e5 11. d5 c6 12. dxc6 Qxd1+ 13. Nxd1 bxc6 14. Be2 Bxf3 15. gxf3 Rd8 16. Nc3 N8d7 17. a5 Nc8 18. 0-0-0 Bf6 19. Ba6 Rb8 20. f4 Nf8 21. f5 Rd4 22. Bxc8 Rxc8 23. Bxd4 exd4 24. Ne2 c5 25. Kc2 Re8 26. fxg6 Nxg6 27. f3 Kf8 28. b3 Ne5 29. Nc1 c4 30. Rxd4 cxb3+ 31. Nxb3 Rc8+ 32. Kb1 Rb8 33. Ka2 Nxf3 34. Rd5 Ne5 35. Rf1 Ke7 36. Nd4 Rg8 37. Nf5+ Kf8 38. Rc1 Rg2+ 39. Kb3 1-0

[Event "Karlsruhe Grenke op"]
[Site "Karlsruhe"]
[Date "2019.04.19"]
[Round "2"]
[White "Ondersteijn, Niels"]
[Black "Schlichtmann, Robin"]
[Result "1-0"]
[ECO "A16"]
[WhiteElo "2390"]
[BlackElo "2186"]
[PlyCount "41"]
[EventDate "2019.04.18"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]

1. c4 Nf6 2. g3 g6 3. Bg2 d5 4. cxd5 Nxd5 5. Nc3 Nb6 6. d3 Bg7 7. Be3 Nc6 8. Bxc6+ bxc6 9. Qd2 Bb7 10. Nf3 0-0 11. 0-0 Rb8 12. Rac1 c5 13. b3 Bxf3 14. exf3 Bd4 15. Kg2 Nd5 16. Bxd4 cxd4 17. Nxd5 Qxd5 18. Rxc7 Rb7 19. Rfc1 Kg7 20. Qe2 e6 21. Rxb7 1-0

[Event "NED-chT 1718"]
[Site "Netherlands"]
[Date "2018.04.21"]
[Round "9.1"]
[White "Fier, Alexandr"]
[Black "Ondersteijn, Niels"]
[Result "1-0"]
[ECO "B36"]
[WhiteElo "2574"]
[BlackElo "2379"]
[PlyCount "55"]
[EventDate "2017.09.16"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]
[WhiteTeam "Apeldoorn"]
[BlackTeam "Calder HMC"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. Nf3 g6 2. c4 c5 3. d4 cxd4 4. Nxd4 Nc6 5. e4 Nf6 6. Nc3 Nxd4 7. Qxd4 d6 8. Bg5 Bg7 9. Qd2 0-0 10. Bd3 a5 11. b3 Bd7 12. 0-0 Bc6 13. Rae1 Nd7 14. Bc2 Nc5 15. h4 Qd7 16. Nd5 Rae8 17. h5 f6 18. Bf4 e5 19. Be3 Qd8 20. h6 Bh8 21. Rd1 b6 22. a3 Rf7 23. b4 axb4 24. axb4 Nd7 25. Bb3 f5 26. exf5 gxf5 27. Bg5 Qb8 28. c5 1-0

[Event "NED-chT 1718"]
[Site "Netherlands"]
[Date "2018.04.07"]
[Round "8.5"]
[White "Ondersteijn, Niels"]
[Black "Vedder, Richard"]
[Result "1-0"]
[ECO "A20"]
[WhiteElo "2379"]
[BlackElo "2253"]
[PlyCount "37"]
[EventDate "2017.09.16"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]
[WhiteTeam "Calder HMC"]
[BlackTeam "En Passant"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. c4 e5 2. g3 h5 3. Nf3 e4 4. Nh4 Be7 5. Nc3 Bxh4 6. gxh4 Qxh4 7. d4 exd3 8. Qxd3 Nf6 9. Rg1 Kf8 10. h3 Nc6 11. Nb5 Ne5 12. Qa3+ d6 13. Nxd6 c5 14. Qxc5 Nfd7 15. Qa3 Qe7 16. Be3 g6 17. 0-0-0 Kg8 18. f4 Nc6 19. Nxc8 1-0

[Event "Karlsruhe Grenke op"]
[Site "Karlsruhe"]
[Date "2018.04.02"]
[Round "8"]
[White "Kollars, Dmitrij"]
[Black "Ondersteijn, Niels"]
[Result "1-0"]
[ECO "C41"]
[WhiteElo "2534"]
[BlackElo "2376"]
[PlyCount "93"]
[EventDate "2018.03.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 183 Extra"]
[Source "ChessBase"]
[SourceDate "2018.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2018.04.19"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Qd2 0-0 8. 0-0-0 Nc6 9. f3 Nxd4 10. Bxd4 Be6 11. Kb1 c5 12. Be3 Qa5 13. Nd5 Qa4 14. Nc3 Qa5 15. h4 Rfd8 16. Bg5 Rd7 17. Bxf6 Bxf6 18. Nd5 Qxd2 19. Nxf6+ Kg7 20. Nh5+ gxh5 21. Rxd2 d5 22. Bb5 Rd6 23. f4 d4 24. f5 Bd7 25. e5 Bxb5 26. exd6 Rd8 27. f6+ Kxf6 28. Rf2+ Kg6 29. Re1 Rxd6 30. Re5 d3 31. Kc1 dxc2 32. Rxc5 Bc6 33. Rfxc2 f5 34. g3 Rf6 35. Rd2 Be4 36. Rd4 Re6 37. Rc8 Bc6 38. Rf8 Be4 39. Rfd8 f4 40. gxf4 Kf5 41. Rf8+ Kg4 42. f5 Rc6+ 43. Kd1 Kf3 44. f6 Bg6 45. Rd7 Ke3 46. f7 Be4 47. Re8 1-0

[Event "Karlsruhe Grenke op"]
[Site "Karlsruhe"]
[Date "2018.04.01"]
[Round "7"]
[White "Ondersteijn, Niels"]
[Black "Korpa, Bence"]
[Result "1/2-1/2"]
[ECO "A36"]
[WhiteElo "2376"]
[BlackElo "2502"]
[PlyCount "90"]
[EventDate "2018.03.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 183 Extra"]
[Source "ChessBase"]
[SourceDate "2018.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2018.04.19"]
[SourceQuality "1"]

1. c4 c5 2. g3 g6 3. Bg2 Bg7 4. Nc3 Nc6 5. e4 e6 6. d3 Nge7 7. Be3 d6 8. Nge2 Nd4 9. Rb1 0-0 10. 0-0 b6 11. f4 Bb7 12. Bf2 Qd7 13. a3 Rad8 14. b4 Ba8 15. Qd2 f5 16. Nxd4 cxd4 17. Ne2 e5 18. h3 Kh8 19. exf5 Bxg2 20. Kxg2 gxf5 21. Kh2 Ng6 22. Rbc1 Rc8 23. Rc2 Rg8 24. Rfc1 Bf8 25. Ng1 Qb7 26. fxe5 dxe5 27. c5 bxc5 28. bxc5 Qc6 29. Qe2 Bh6 30. Nf3 Bxc1 31. Nxe5 Qd5 32. Nxg6+ hxg6 33. Rxc1 Rge8 34. Qb2 Kg8 35. Qxd4 Qxd4 36. Bxd4 Red8 37. Rc4 Rc6 38. Kg2 Kf7 39. Kf3 Ke6 40. h4 Rc7 41. Kf4 Rcd7 42. Be5 Rxd3 43. c6 Rxa3 44. c7 Rg8 45. Bb2 Rb3 1/2-1/2

[Event "Karlsruhe Grenke op"]
[Site "Karlsruhe"]
[Date "2018.03.31"]
[Round "5"]
[White "Ondersteijn, Niels"]
[Black "Bacrot, Etienne"]
[Result "1/2-1/2"]
[ECO "A29"]
[WhiteElo "2376"]
[BlackElo "2718"]
[PlyCount "111"]
[EventDate "2018.03.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 183 Extra"]
[Source "ChessBase"]
[SourceDate "2018.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2018.04.19"]
[SourceQuality "1"]

1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nc3 Nb6 6. Nf3 Nc6 7. 0-0 Be7 8. Rb1 a5 9. d3 Be6 10. Be3 Nd5 11. Nxd5 Bxd5 12. Qa4 0-0 13. Rbc1 Bd6 14. a3 Ne7 15. Nd2 c6 16. Bxd5 Nxd5 17. Bc5 Re8 18. Qb3 Bxc5 19. Rxc5 Qd7 20. e4 a4 21. Qc2 Nc7 22. Nf3 f6 23. Kg2 Red8 24. Rd1 Ne6 25. Rc4 c5 26. h3 b5 27. Rc3 c4 28. Qd2 Qb7 29. Qe1 Nc5 30. dxc4 Nxe4 31. Rxd8+ Rxd8 32. Re3 Nd6 33. cxb5 Qxb5 34. Qd1 Nb7 35. Qe2 Qd5 36. Kh2 Nc5 37. Ne1 h6 38. Qc2 e4 39. f3 f5 40. fxe4 fxe4 41. Ng2 Qd4 42. Rc3 Ne6 43. h4 Qe5 44. Re3 Nc5 45. Rc3 Nd3 46. Qxa4 Nf2 47. Qc4+ Kh7 48. Qe2 Qf5 49. Nf4 e3 50. Kg2 Qe4+ 51. Qf3 Rd2 52. Rxe3 Nd1+ 53. Re2 Rxe2+ 54. Nxe2 Ne3+ 55. Kf2 Nd1+ 56. Kg2 1/2-1/2

[Event "Karlsruhe Grenke op"]
[Site "Karlsruhe"]
[Date "2018.03.30"]
[Round "3"]
[White "Sadzikowski, Daniel"]
[Black "Ondersteijn, Niels"]
[Result "1-0"]
[ECO "B39"]
[WhiteElo "2583"]
[BlackElo "2376"]
[PlyCount "79"]
[EventDate "2018.03.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 183 Extra"]
[Source "ChessBase"]
[SourceDate "2018.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2018.04.19"]
[SourceQuality "1"]

1. Nf3 g6 2. e4 c5 3. c4 Nc6 4. d4 cxd4 5. Nxd4 Nf6 6. Nc3 Nxd4 7. Qxd4 d6 8. f3 Bg7 9. Be3 0-0 10. Qd2 a5 11. b3 Be6 12. Rc1 Nd7 13. Be2 Nc5 14. 0-0 Qb6 15. Nb5 Rfc8 16. Kh1 Qd8 17. Rfd1 Qf8 18. Re1 Bd7 19. Nc3 Bc6 20. Bf1 Rd8 21. Nd5 e6 22. Nc3 h5 23. Ne2 Kh7 24. Nd4 e5 25. Nb5 Bh6 26. Nc7 Ra7 27. Red1 Bxe3 28. Qxe3 b6 29. Nd5 Bxd5 30. Rxd5 Qh6 31. Qxh6+ Kxh6 32. Rcd1 Rad7 33. g3 Ne6 34. Bh3 Kg7 35. Bxe6 fxe6 36. Rb5 Rb7 37. c5 Rdb8 38. cxd6 Kf6 39. Rc1 g5 40. Kg2 1-0

[Event "NED-chT 1718"]
[Site "Netherlands"]
[Date "2018.02.03"]
[Round "6.8"]
[White "Blees, Albert"]
[Black "Ondersteijn, Niels"]
[Result "0-1"]
[ECO "A37"]
[WhiteElo "2374"]
[BlackElo "2379"]
[PlyCount "76"]
[EventDate "2017.09.16"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]
[WhiteTeam "Rotterdam Pathena"]
[BlackTeam "Calder HMC"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. c4 g6 2. Nf3 c5 3. g3 Nc6 4. Bg2 Bg7 5. 0-0 d6 6. Nc3 e5 7. d3 Nge7 8. Ne1 Be6 9. Nd5 0-0 10. Nc2 Rb8 11. a4 h6 12. Rb1 a5 13. b3 f5 14. f4 Kh7 15. Kh1 Nb4 16. Ncxb4 axb4 17. e4 Nxd5 18. exd5 Bd7 19. Be3 Re8 20. Re1 exf4 21. Bxf4 Qf6 22. d4 g5 23. Be3 f4 24. gxf4 gxf4 25. Bf2 Rxe1+ 26. Qxe1 f3 27. Bf1 Re8 28. Bd3+ Kh8 29. Qd2 Bh3 30. dxc5 dxc5 31. Re1 Rf8 32. Qe3 Qd4 33. Qxd4 Bxd4 34. Bxd4+ cxd4 35. Bf1 f2 36. Rc1 Re8 37. Bxh3 Re1+ 38. Kg2 f1Q+ 0-1

[Event "Seville op 43rd"]
[Site "Seville"]
[Date "2018.01.19"]
[Round "8"]
[White "Pap, Misa"]
[Black "Ondersteijn, Niels"]
[Result "1-0"]
[ECO "C41"]
[WhiteElo "2491"]
[BlackElo "2370"]
[PlyCount "73"]
[EventDate "2018.01.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "CBM 182 Extra"]
[Source "ChessBase"]
[SourceDate "2018.02.23"]
[SourceVersion "1"]
[SourceVersionDate "2018.02.23"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Qxd4 a6 5. Bf4 Nc6 6. Qd2 Nf6 7. Nc3 Be7 8. 0-0-0 0-0 9. h3 b5 10. Bd3 Nb4 11. Be2 Bb7 12. a3 Nc6 13. g4 b4 14. axb4 a5 15. b5 Nb4 16. Qe3 a4 17. Nd4 a3 18. b3 Nxe4 19. Nxe4 Nd5 20. Qg3 Nxf4 21. Qxf4 Bxe4 22. Qxe4 Re8 23. Qf3 c5 24. bxc6 Qa5 25. c3 Bf6 26. Kc2 a2 27. Bc4 Bxd4 28. cxd4 d5 29. Bxd5 Red8 30. Bc4 Qb6 31. d5 Qc5 32. Qe3 Qd6 33. Rhe1 Qf6 34. Qc3 Qxf2+ 35. Re2 Qf4 36. Kb2 h6 37. Ka1 1-0

[Event "Seville op 43rd"]
[Site "Seville"]
[Date "2018.01.16"]
[Round "5"]
[White "Ondersteijn, Niels"]
[Black "Santos Latasa, Jaime"]
[Result "0-1"]
[ECO "A37"]
[WhiteElo "2370"]
[BlackElo "2546"]
[PlyCount "94"]
[EventDate "2018.01.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ESP"]
[SourceTitle "CBM 182 Extra"]
[Source "ChessBase"]
[SourceDate "2018.02.23"]
[SourceVersion "1"]
[SourceVersionDate "2018.02.23"]
[SourceQuality "1"]

1. c4 c5 2. g3 g6 3. Bg2 Bg7 4. Nc3 Nc6 5. a3 d6 6. Rb1 a5 7. d3 e5 8. Nf3 Nge7 9. 0-0 0-0 10. Bd2 h6 11. Ne1 Be6 12. Nc2 d5 13. cxd5 Nxd5 14. Ne3 Nde7 15. Na4 b6 16. b4 cxb4 17. axb4 b5 18. Nc5 Ba2 19. Nb7 Qd7 20. Nxa5 Bxb1 21. Nxc6 Nxc6 22. Qxb1 Nd4 23. Re1 e4 24. Kf1 Ra3 25. Bxe4 Qh3+ 26. Bg2 Qxh2 27. Nc2 Rb3 28. Qa2 Nxc2 29. Qxb3 Nxe1 30. Bxe1 Rc8 31. Bd2 h5 32. e3 h4 33. gxh4 Qxh4 34. d4 Qg4 35. Qb1 Bf6 36. Be1 Kg7 37. Bd2 Rc7 38. Be1 Be7 39. Qe4 Qg5 40. f4 Qf6 41. Ke2 Bd6 42. Qd3 Qe7 43. Qe4 Qf6 44. Qd3 Qe6 45. Kf3 Rc4 46. Bc3 Qc8 47. Ba1 Qa8+ 0-1

[Event "NED-chT 1718"]
[Site "Netherlands"]
[Date "2017.12.16"]
[Round "5.5"]
[White "Erwich, Frank"]
[Black "Ondersteijn, Niels"]
[Result "1/2-1/2"]
[ECO "C41"]
[WhiteElo "2346"]
[BlackElo "2379"]
[PlyCount "49"]
[EventDate "2017.09.16"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]
[WhiteTeam "BSG"]
[BlackTeam "Calder HMC"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 Nf6 5. Nc3 Be7 6. Nde2 c6 7. g3 b5 8. a3 0-0 9. Bg2 a6 10. 0-0 Re8 11. h3 Bb7 12. g4 Nfd7 13. Ng3 g6 14. f4 c5 15. g5 Nb6 16. b3 Nc6 17. Nd5 Nxd5 18. exd5 Nd4 19. c3 Nf5 20. Nxf5 gxf5 21. Qc2 Qd7 22. h4 Bf8 23. Bh3 Bc8 24. Bd2 c4 25. b4 1/2-1/2

[Event "NED-chT 1718"]
[Site "Netherlands"]
[Date "2017.11.25"]
[Round "4.8"]
[White "Ondersteijn, Niels"]
[Black "Braun, Christian1111"]
[Result "0-1"]
[ECO "A24"]
[WhiteElo "2379"]
[BlackElo "2369"]
[PlyCount "78"]
[EventDate "2017.09.16"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 181 Extra"]
[Source "ChessBase"]
[SourceDate "2017.12.12"]
[SourceVersion "1"]
[SourceVersionDate "2017.12.12"]
[SourceQuality "1"]
[WhiteTeam "Calder HMC"]
[BlackTeam "Voerendaal"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. c4 Nf6 2. g3 g6 3. Bg2 Bg7 4. Nc3 0-0 5. d3 d6 6. Rb1 e5 7. b4 Nbd7 8. Nf3 Re8 9. e4 Nf8 10. h3 Ne6 11. 0-0 a5 12. a3 Bd7 13. Be3 Qc8 14. Kh2 Nd4 15. b5 Nxf3+ 16. Qxf3 Ng4+ 17. Kg1 Nxe3 18. fxe3 Be6 19. Kh2 Qd7 20. a4 Rf8 21. h4 c6 22. Nd1 f5 23. exf5 Bxf5 24. Qe2 Bg4 25. Qe1 Rxf1 26. Qxf1 Rf8 27. bxc6 bxc6 28. Qe1 Bh6 29. Nf2 Bf3 30. Bh3 Qa7 31. Ng4 Bxg4 32. Bxg4 Bxe3 33. Qh1 Qc5 34. Rf1 Bf2 35. Qg2 Qe3 36. Ra1 Qxd3 37. Rd1 Qxc4 38. Bf3 Qc3 39. Bxc6 Bxg3+ 0-1

[Event "NED-chT 1718"]
[Site "Netherlands"]
[Date "2017.11.04"]
[Round "3.10"]
[White "Van der Werf, Mark"]
[Black "Ondersteijn, Niels"]
[Result "1-0"]
[ECO "B37"]
[WhiteElo "2400"]
[BlackElo "2379"]
[PlyCount "51"]
[EventDate "2017.09.16"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Calder HMC"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 c5 4. e4 Nc6 5. d4 cxd4 6. Nxd4 d6 7. Nc2 Bg7 8. Be2 0-0 9. 0-0 Nd7 10. Be3 Bxc3 11. bxc3 Nc5 12. f3 Qa5 13. Qd2 Na4 14. Nb4 Nxc3 15. Nxc6 Nxe2+ 16. Kf2 Qc7 17. Nb4 Qxc4 18. Nd5 e6 19. Ne7+ Kh8 20. Nxc8 Raxc8 21. Qxe2 Qa4 22. Rac1 Rc6 23. Qb2+ e5 24. Qb3 Qa6 25. Rxc6 bxc6 26. Bh6 1-0

[Event "NED-chT 1718"]
[Site "Netherlands"]
[Date "2017.09.23"]
[Round "2.9"]
[White "Maatman, Nick"]
[Black "Ondersteijn, Niels"]
[Result "1/2-1/2"]
[ECO "D85"]
[WhiteElo "2339"]
[BlackElo "2379"]
[PlyCount "86"]
[EventDate "2017.09.16"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]
[WhiteTeam "SISSA"]
[BlackTeam "Calder HMC"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3 c5 8. Rb1 0-0 9. Be2 cxd4 10. cxd4 Qa5+ 11. Bd2 Qxa2 12. 0-0 b6 13. Qc1 Qe6 14. Bc4 Qxe4 15. Re1 Qb7 16. Bb4 Be6 17. Rxe6 fxe6 18. Ng5 Na6 19. Qe3 Nc7 20. Bxe7 Rf5 21. Bxe6+ Nxe6 22. Qxe6+ Kh8 23. Nf7+ Rxf7 24. Qxf7 Qd7 25. Qf3 Re8 26. Bf6 Rf8 27. Bxg7+ Kxg7 28. Qc3 Qf5 29. Rf1 Qd5 30. h3 Rd8 31. Rd1 b5 32. Rd3 Qc4 33. Qd2 Qd5 34. Qe1 Rd7 35. h4 Rb7 36. Re3 b4 37. Re7+ Kf6 38. Rxb7 Qxb7 39. Qe5+ Kf7 40. d5 b3 41. Qe6+ Kg7 42. Qe5+ Kf7 43. Qe6+ Kg7 1/2-1/2

[Event "NED-chT 1718"]
[Site "Netherlands"]
[Date "2017.09.16"]
[Round "1.6"]
[White "Kleijn, Christov"]
[Black "Ondersteijn, Niels"]
[Result "1/2-1/2"]
[ECO "C41"]
[WhiteElo "2443"]
[BlackElo "2379"]
[PlyCount "75"]
[EventDate "2017.09.16"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 180 Extra"]
[Source "ChessBase"]
[SourceDate "2017.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.06"]
[SourceQuality "1"]
[WhiteTeam "Kennemer Combinatie"]
[BlackTeam "Calder HMC"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 Nf6 5. Nc3 Be7 6. Be2 0-0 7. 0-0 Re8 8. Re1 Bf8 9. Bf1 Nbd7 10. h3 Nc5 11. Qf3 d5 12. e5 Nfe4 13. Bf4 c6 14. Rad1 Qb6 15. Nxe4 Nxe4 16. Nb3 a5 17. c4 a4 18. Nc1 a3 19. b3 Bb4 20. Rxe4 dxe4 21. Qxe4 g6 22. g4 f5 23. Qe2 Be6 24. Nd3 Rad8 25. Nxb4 Rxd1 26. Qxd1 Qxb4 27. Bg5 fxg4 28. hxg4 b5 29. Qd6 Qxd6 30. exd6 Bd7 31. Be3 Kf7 32. g5 bxc4 33. Bxc4+ Be6 34. Bb6 Bxc4 35. d7 Bd3 36. dxe8Q+ Kxe8 37. Bc5 Bb1 38. Bxa3 1/2-1/2

[Event "Karlsruhe Grenke op"]
[Site "Karlsruhe"]
[Date "2017.04.16"]
[Round "6"]
[White "Ondersteijn, Niels"]
[Black "Ruck, Robert"]
[Result "0-1"]
[ECO "A01"]
[WhiteElo "2367"]
[BlackElo "2557"]
[PlyCount "44"]
[EventDate "2017.04.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 177 Extra"]
[Source "ChessBase"]
[SourceDate "2017.04.27"]
[SourceVersion "1"]
[SourceVersionDate "2017.04.27"]
[SourceQuality "1"]

1. b3 d5 2. Bb2 Bg4 3. f3 Bf5 4. e4 dxe4 5. Nc3 Nf6 6. Qe2 exf3 7. Nxf3 c6 8. 0-0-0 Bg4 9. h3 Bxf3 10. Qxf3 e6 11. g4 Qa5 12. Kb1 Ba3 13. Ba1 Nbd7 14. Rg1 Bc5 15. Rg2 Bd4 16. Re2 0-0-0 17. Bg2 Ne5 18. Qg3 h6 19. Rf1 Rd7 20. Rf4 Ng6 21. Rxd4 Rxd4 22. Nb5 Qxb5 0-1

[Event "Karlsruhe Grenke op"]
[Site "Karlsruhe"]
[Date "2017.04.15"]
[Round "4"]
[White "Sadzikowski, Daniel"]
[Black "Ondersteijn, Niels"]
[Result "1-0"]
[ECO "B36"]
[WhiteElo "2547"]
[BlackElo "2367"]
[PlyCount "95"]
[EventDate "2017.04.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 177 Extra"]
[Source "ChessBase"]
[SourceDate "2017.04.27"]
[SourceVersion "1"]
[SourceVersionDate "2017.04.27"]
[SourceQuality "1"]

1. c4 g6 2. e4 c5 3. Nf3 Nc6 4. d4 cxd4 5. Nxd4 Nf6 6. Nc3 d6 7. f3 Nxd4 8. Qxd4 Bg7 9. Be3 0-0 10. Qd2 Be6 11. Rc1 Qa5 12. b3 Rfc8 13. Be2 a6 14. Na4 Qxd2+ 15. Kxd2 Nd7 16. g4 f5 17. exf5 gxf5 18. Rhg1 fxg4 19. fxg4 Rf8 20. Nc3 Rac8 21. Nd5 Bxd5 22. cxd5 Bb2 23. Rxc8 Rxc8 24. Bd3 Kg7 25. Bf5 Rc7 26. g5 Ne5 27. Ke2 Ng6 28. h3 b5 29. Rg4 Ne5 30. Rg1 Ng6 31. Rf1 Be5 32. Be4 Rc8 33. Bd2 Ra8 34. Bd3 Rf8 35. Rxf8 Kxf8 36. Kf3 Bd4 37. Kg3 Be5+ 38. Kg4 Bd4 39. Be2 Bb6 40. h4 Kf7 41. h5 Nf8 42. Bd3 Kg8 43. Bf5 a5 44. Bc3 b4 45. Bb2 Be3 46. Bc8 Bc5 47. Kf5 Be3 48. g6 1-0

[Event "NED-chT 1617"]
[Site "Netherlands"]
[Date "2017.04.01"]
[Round "8.3"]
[White "Geurink, Jasper"]
[Black "Ondersteijn, Niels"]
[Result "0-1"]
[ECO "C41"]
[WhiteElo "2359"]
[BlackElo "2391"]
[PlyCount "124"]
[EventDate "2016.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]
[WhiteTeam "Groningen Combinatie"]
[BlackTeam "Calder HMC"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 d6 3. Bc4 Nf6 4. d3 Be7 5. c3 0-0 6. Nbd2 c6 7. Bb3 Nbd7 8. d4 b6 9. 0-0 Qc7 10. Re1 h6 11. Nh4 Re8 12. Nf1 Nf8 13. Nf5 Bxf5 14. exf5 exd4 15. cxd4 d5 16. Be3 Qd7 17. Ng3 Bb4 18. Rf1 N8h7 19. Bc2 Bd6 20. Nh5 Be7 21. Nxf6+ Bxf6 22. Bf4 Re7 23. a4 Rae8 24. Ra3 c5 25. Rg3 Kh8 26. dxc5 bxc5 27. b3 c4 28. h3 cxb3 29. Bxb3 Qxf5 30. Bd6 Rd7 31. Bc2 Qe6 32. Re3 Qxe3 33. fxe3 Rxd6 34. Qh5 g6 35. Qg4 Rxe3 36. Qf4 Ree6 37. Bd3 Kg7 38. h4 h5 39. Rb1 Be5 40. Qf2 Nf6 41. Qxa7 Bf4 42. Qa5 Ng4 43. Bf1 d4 44. Bc4 Rf6 45. Be2 d3 46. Bxg4 hxg4 47. g3 Be3+ 48. Kg2 d2 49. Qe5 Bd4 50. Qe4 Rf2+ 51. Kh1 Bc3 52. Kg1 Rf3 53. Qxg4 d1Q+ 54. Rxd1 Rxd1+ 55. Kg2 Rdd3 56. Qxf3 Rxf3 57. Kxf3 Be1 58. Kg4 Kh6 59. Kf4 Kh5 60. Kf3 Ba5 61. Kf4 Bc7+ 62. Kf3 f5 0-1

[Event "NED-chT 1617"]
[Site "Netherlands"]
[Date "2017.02.04"]
[Round "6.8"]
[White "Ondersteijn, Niels"]
[Black "Van der Lende, Ilias"]
[Result "0-1"]
[ECO "A01"]
[WhiteElo "2391"]
[BlackElo "2347"]
[PlyCount "90"]
[EventDate "2016.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]
[WhiteTeam "Calder HMC"]
[BlackTeam "Kennemer Combinatie"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. b3 e5 2. Bb2 Nc6 3. e3 d5 4. Bb5 Bd6 5. f4 Qh4+ 6. g3 Qe7 7. Nf3 f6 8. Nc3 Qf7 9. fxe5 fxe5 10. d4 e4 11. Ne5 Bxe5 12. dxe5 Be6 13. Rf1 Qg6 14. Ne2 Nge7 15. Nf4 Qh6 16. Qh5+ Qxh5 17. Nxh5 Rg8 18. Nf4 Bg4 19. h3 Bf3 20. Ne6 Rc8 21. Ng5 Bg2 22. Rf2 h6 23. Rxg2 hxg5 24. Kd2 Kd7 25. c4 a6 26. Bxc6+ bxc6 27. Rc1 Rh8 28. Rh2 Nf5 29. cxd5 cxd5 30. e6+ Kxe6 31. Rc6+ Kd7 32. Rg6 Nxg3 33. Rf2 Rhf8 34. Rxg7+ Kc6 35. Rxf8 Rxf8 36. Be5 Rf2+ 37. Kc3 Ne2+ 38. Kb4 d4 39. exd4 e3 40. Rxc7+ Kd5 41. Rd7+ Ke4 42. Bg7 Nf4 43. Kc5 Ne6+ 44. Kb6 e2 45. Re7 Kf5 0-1

[Event "NED-chT 1617"]
[Site "Netherlands"]
[Date "2016.12.17"]
[Round "5.5"]
[White "Ondersteijn, Niels"]
[Black "Wiersma, Eelke"]
[Result "1/2-1/2"]
[ECO "A01"]
[WhiteElo "2391"]
[BlackElo "2346"]
[PlyCount "77"]
[EventDate "2016.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]
[WhiteTeam "Calder HMC"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. b3 e5 2. Bb2 Nc6 3. e3 d5 4. Bb5 f6 5. d4 exd4 6. Qxd4 Nge7 7. Nc3 Be6 8. 0-0-0 a6 9. Bxc6+ Nxc6 10. Qh4 Ne7 11. Nge2 c6 12. e4 Qa5 13. exd5 Nxd5 14. Nxd5 Bxd5 15. Qh5+ g6 16. Qh3 Bg7 17. c4 Bf7 18. Qd7+ Kf8 19. Qxb7 Re8 20. Rd7 Bh6+ 21. Kb1 Be6 22. Rxh7 Rxh7 23. Qxh7 Bg7 24. Nd4 Bf5+ 25. Nxf5 Qxf5+ 26. Ka1 Re2 27. Qh4 Rxf2 28. Rd1 Rxg2 29. Qd4 Kg8 30. h4 Kh7 31. c5 Qh5 32. Rb1 Rxb2 33. Rxb2 f5 34. Qd7 Kh8 35. Kb1 Bxb2 36. Kxb2 Qe2+ 37. Ka3 Qb5 38. Qd8+ Kh7 39. Qe7+ 1/2-1/2

[Event "NED-chT 1617"]
[Site "Netherlands"]
[Date "2016.11.26"]
[Round "4.3"]
[White "Ondersteijn, Niels"]
[Black "Van Foreest, Jorden"]
[Result "0-1"]
[ECO "A01"]
[WhiteElo "2391"]
[BlackElo "2615"]
[PlyCount "98"]
[EventDate "2016.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]
[WhiteTeam "Calder HMC"]
[BlackTeam "SISSA"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. b3 g6 2. Bb2 Nf6 3. Bxf6 exf6 4. c4 Bg7 5. Nc3 f5 6. Rc1 0-0 7. g3 d6 8. Bg2 c6 9. e3 Nd7 10. Nge2 h5 11. h4 Nf6 12. 0-0 Bd7 13. b4 Ng4 14. Nf4 a6 15. a4 Re8 16. Re1 Bh6 17. Nh3 Qf6 18. f4 Qd8 19. b5 axb5 20. axb5 Bg7 21. bxc6 bxc6 22. Qb3 Qa5 23. Nf2 Reb8 24. Qc2 Nxf2 25. Kxf2 Qc5 26. Bf1 Be6 27. d4 Qa5 28. Bg2 Qa6 29. Nd1 Rb4 30. c5 Rc4 31. Qb2 Rxc5 32. Rxc5 dxc5 33. Qc1 cxd4 34. Qxc6 Qxc6 35. Bxc6 Ra1 36. exd4 Bxd4+ 37. Kg2 Bb3 38. Bf3 Kg7 39. Kh3 Bc4 40. Kg2 Ra2+ 41. Kh3 Rd2 42. Rh1 Bd3 43. Re1 Kf6 44. Rh1 Be4 45. Bxe4 fxe4 46. Re1 Rd3 47. Kg2 Kf5 48. Kh3 e3 49. Kg2 Kg4 0-1

[Event "NED-chT 1617"]
[Site "Netherlands"]
[Date "2016.11.05"]
[Round "3.7"]
[White "Den Hartog, Marijn"]
[Black "Ondersteijn, Niels"]
[Result "1-0"]
[ECO "B04"]
[WhiteElo "2190"]
[BlackElo "2391"]
[PlyCount "71"]
[EventDate "2016.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]
[WhiteTeam "Rotterdam Pathena"]
[BlackTeam "Calder HMC"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 dxe5 5. Nxe5 g6 6. Bc4 Be6 7. 0-0 Bg7 8. Qe2 0-0 9. Rd1 c6 10. Bb3 a5 11. c4 Nc7 12. Nc3 Nd7 13. Bf4 Nxe5 14. Bxe5 Bh6 15. d5 cxd5 16. cxd5 Bf5 17. d6 exd6 18. Bxd6 Re8 19. Qc4 Ne6 20. Be5 Qc8 21. Qh4 Bg7 22. Bxg7 Kxg7 23. Rac1 g5 24. Qg3 Qb8 25. Qf3 Nf4 26. Nd5 Ne2+ 27. Kh1 Qe5 28. Rc7 Nd4 29. Qc3 a4 30. Bc4 b5 31. Ne3 Qxc7 32. Nxf5+ Kg6 33. Rxd4 bxc4 34. Rd6+ Qxd6 35. Nxd6 Rad8 36. Qc2+ 1-0

[Event "NED-chT 1617"]
[Site "Netherlands"]
[Date "2016.10.08"]
[Round "2.4"]
[White "Ikonnikov, Vyacheslav"]
[Black "Ondersteijn, Niels"]
[Result "1-0"]
[ECO "B39"]
[WhiteElo "2538"]
[BlackElo "2391"]
[PlyCount "79"]
[EventDate "2016.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]
[WhiteTeam "En Passant"]
[BlackTeam "Calder HMC"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. Nf3 g6 2. c4 Bg7 3. e4 c5 4. d4 cxd4 5. Nxd4 Nc6 6. Be3 Nf6 7. Nc3 Ng4 8. Qxg4 Nxd4 9. Qd1 e5 10. Bd3 0-0 11. 0-0 d6 12. Qd2 Be6 13. b3 a6 14. Rac1 Qd7 15. f4 exf4 16. Bxf4 Nc6 17. Bb1 Be5 18. Bh6 Rfe8 19. Nd5 Bxd5 20. exd5 Nb8 21. Qf2 Qe7 22. Bg5 Bd4 23. Qxd4 Qxg5 24. Qf6 Qe3+ 25. Kh1 Qe7 26. Qxe7 Rxe7 27. Rf6 Nd7 28. Rxd6 Rae8 29. Kg1 Kg7 30. Rf1 f5 31. h3 Nf6 32. Bd3 Re3 33. Rd1 Nh5 34. Rb6 f4 35. Rxb7+ Kh6 36. d6 Ng3 37. Kf2 Kg5 38. d7 Rd8 39. c5 Re6 40. Rc7 1-0

[Event "Utrecht OKU op 43rd"]
[Site "Utrecht"]
[Date "2016.06.05"]
[Round "6"]
[White "Van de Fliert, Willem"]
[Black "Ondersteijn, Niels"]
[Result "1-0"]
[ECO "C41"]
[WhiteElo "2165"]
[BlackElo "2391"]
[PlyCount "97"]
[EventDate "2016.06.03"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 172 Extra"]
[Source "ChessBase"]
[SourceDate "2016.06.21"]
[SourceVersion "1"]
[SourceVersionDate "2016.06.21"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 Nf6 5. Nc3 Be7 6. g3 d5 7. e5 Ng4 8. e6 Nf6 9. exf7+ Kxf7 10. Bg2 Re8 11. 0-0 c6 12. Bf4 Na6 13. a3 Bg4 14. Nf3 Bd6 15. Qd4 Bxf3 16. Bxf3 Bxf4 17. Qxf4 Qc7 18. Qxc7+ Nxc7 19. Rad1 Rad8 20. Ne2 Nd7 21. Kg2 Ne5 22. b3 Rd6 23. Bh5+ g6 24. f4 Nd7 25. Bf3 Nf6 26. Nc1 Nb5 27. a4 Nc3 28. Rde1 Rxe1 29. Rxe1 Re6 30. Rxe6 Kxe6 31. Nd3 b6 32. Kf2 Kd6 33. Ke3 c5 34. Nf2 a6 35. Kd3 d4 36. Bb7 Nfd5 37. Bxd5 Kxd5 38. Ng4 Ne4 39. c4+ dxc3 40. Ne3+ Ke6 41. Kxe4 b5 42. axb5 axb5 43. g4 b4 44. Kd3 Kd6 45. Kc4 Kc6 46. f5 gxf5 47. gxf5 Kd6 48. Kb5 h5 49. h4 1-0

[Event "Utrecht OKU op 43rd"]
[Site "Utrecht"]
[Date "2016.06.04"]
[Round "3"]
[White "Ondersteijn, Niels"]
[Black "Tikranian, Alik"]
[Result "0-1"]
[ECO "D11"]
[WhiteElo "2391"]
[BlackElo "2120"]
[PlyCount "86"]
[EventDate "2016.06.03"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 172 Extra"]
[Source "ChessBase"]
[SourceDate "2016.06.21"]
[SourceVersion "1"]
[SourceVersionDate "2016.06.21"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Qc2 g6 5. Bf4 Bg7 6. e3 Bf5 7. Qb3 Qb6 8. Nc3 dxc4 9. Bxc4 Qxb3 10. Bxb3 Nbd7 11. h3 h6 12. Nd2 g5 13. Bh2 Nb6 14. e4 Bg6 15. a4 a5 16. 0-0 0-0 17. Rfe1 Nfd7 18. Nf3 c5 19. d5 Rac8 20. Rac1 c4 21. Bc2 Nc5 22. Be5 Rfd8 23. Bxg7 Kxg7 24. h4 e6 25. hxg5 hxg5 26. dxe6 Nxe6 27. Rcd1 Bh5 28. Rxd8 Rxd8 29. Rd1 Bxf3 30. Rxd8 Nxd8 31. gxf3 Kf6 32. Kg2 Ke5 33. Kg3 Ne6 34. Kg4 f6 35. Bd1 Nc5 36. Kg3 Kd4 37. Bc2 Ke5 38. Bd1 Nd3 39. b3 cxb3 40. Bxb3 Nc5 41. Bd5 Ncxa4 42. Nxa4 Nxa4 43. Bxb7 Nc3 0-1

[Event "NED-chT 1516"]
[Site "Netherlands"]
[Date "2016.04.23"]
[Round "9.4"]
[White "Ondersteijn, Niels"]
[Black "Vereggen, Lars"]
[Result "1/2-1/2"]
[ECO "D97"]
[WhiteElo "2415"]
[BlackElo "2340"]
[PlyCount "87"]
[EventDate "2015.09.26"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]
[WhiteTeam "Calder HMC"]
[BlackTeam "Rotterdam Pathena"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 0-0 7. e4 c6 8. Be2 b5 9. Qb3 Qa5 10. Bd2 b4 11. Na4 Nxe4 12. Bxb4 Qc7 13. 0-0 Be6 14. Qe3 Nd6 15. Qf4 Qd8 16. Rfd1 Nf5 17. Nc3 Bh6 18. Qe4 Bd5 19. Nxd5 cxd5 20. Qc2 Qc8 21. Qxc8 Rxc8 22. g4 Nc6 23. Bc5 Nd6 24. Ba6 Rcb8 25. Ne5 Nxe5 26. dxe5 Ne4 27. Bxe7 Rxb2 28. Rab1 Rxa2 29. Bb7 Re8 30. Bxd5 Rxf2 31. g5 Bf8 32. Bxe4 Rf4 33. Bxf8 Kxf8 34. Bg2 Rxe5 35. Ra1 a5 36. Rd8+ Kg7 37. Rd5 Rxd5 38. Bxd5 Rg4+ 39. Kf2 Rxg5 40. Rxa5 Rf5+ 41. Kg3 h5 42. h3 Kh6 43. Rb5 Kg7 44. Bc4 1/2-1/2

[Event "NED-chT 1516"]
[Site "Netherlands"]
[Date "2016.04.02"]
[Round "8.9"]
[White "Ondersteijn, Niels"]
[Black "Beekman, Robert J"]
[Result "1-0"]
[ECO "E71"]
[WhiteElo "2415"]
[BlackElo "2235"]
[PlyCount "53"]
[EventDate "2015.09.26"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]
[WhiteTeam "Calder HMC"]
[BlackTeam "Utrecht"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. h3 0-0 6. Be3 e5 7. d5 a5 8. c5 Na6 9. cxd6 cxd6 10. Nf3 Bd7 11. Nd2 Nc5 12. Bxc5 dxc5 13. a4 Ne8 14. Qb3 Nd6 15. Nc4 Nxc4 16. Bxc4 Qg5 17. g3 Bh6 18. Rd1 Qd8 19. Bb5 f5 20. d6+ Kh8 21. Bxd7 Qxd7 22. Qb5 Qxb5 23. Nxb5 fxe4 24. Nc7 e3 25. Nxa8 exf2+ 26. Ke2 Rxa8 27. d7 1-0

[Event "NED-chT 1516"]
[Site "Netherlands"]
[Date "2016.03.19"]
[Round "7.6"]
[White "Ondersteijn, Niels"]
[Black "Meng, Roger"]
[Result "1/2-1/2"]
[ECO "E46"]
[WhiteElo "2415"]
[BlackElo "2357"]
[PlyCount "181"]
[EventDate "2015.09.26"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]
[WhiteTeam "Calder HMC"]
[BlackTeam "Charlois Europoort"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Nge2 d5 6. a3 Be7 7. cxd5 exd5 8. Nf4 c6 9. Bd3 Bd6 10. 0-0 Re8 11. f3 b6 12. Bc2 Ba6 13. Re1 Nbd7 14. b4 Qc7 15. g3 Rad8 16. Rb1 Bc4 17. Kg2 a5 18. e4 axb4 19. axb4 dxe4 20. fxe4 c5 21. bxc5 bxc5 22. d5 Rb8 23. Bd2 Rxb1 24. Bxb1 Rb8 25. Qc1 Ne5 26. Nd1 Qb6 27. Ne3 Qb2 28. Bc2 Qxc1 29. Rxc1 Bb3 30. Nf5 Bxc2 31. Rxc2 Bf8 32. Bc3 Re8 33. d6 Ned7 34. Bxf6 Nxf6 35. Rxc5 Nxe4 36. Ne7+ Bxe7 37. d7 Rd8 38. Re5 Rxd7 39. Rxe4 g6 40. Re3 Kg7 41. Re2 Bc5 42. Rc2 Be3 43. Kf3 Ba7 44. Ra2 Rb7 45. Kg2 Be3 46. Nd5 Ba7 47. Nf4 h5 48. Nd3 Bd4 49. Ne1 Rb1 50. Nf3 Bb6 51. Rc2 f6 52. h4 Kf7 53. Nd2 Rb4 54. Kf3 Ke6 55. Rc6+ Kf5 56. Rc4 Rb2 57. Ne4 Ke5 58. Rc8 Rb3+ 59. Rc3 Rb5 60. Nd2 Bd4 61. Rc2 Kf5 62. Kg2 Rb4 63. Rc4 Rxc4 64. Nxc4 Ke4 65. Nd2+ Kd3 66. Nf3 Be3 67. Nh2 Ke2 68. Nf3 Bc5 69. Nh2 g5 70. hxg5 fxg5 71. Nf3 g4 72. Nh2 Bf2 73. Nf1 Be1 74. Nh2 Ke3 75. Nf1+ Ke4 76. Nh2 Kf5 77. Nf1 Kg5 78. Kh2 Bf2 79. Kg2 Be1 80. Kh2 Bxg3+ 81. Kxg3 h4+ 82. Kf2 Kf4 83. Ng3 hxg3+ 84. Kg2 Kg5 85. Kxg3 Kf5 86. Kg2 Kf4 87. Kf2 g3+ 88. Kg2 Kg4 89. Kg1 Kh3 90. Kh1 Kg4 91. Kg2 1/2-1/2

[Event "NED-chT 1516"]
[Site "Netherlands"]
[Date "2016.02.13"]
[Round "6.10"]
[White "De Groote, Ewoud"]
[Black "Ondersteijn, Niels"]
[Result "1/2-1/2"]
[ECO "C41"]
[WhiteElo "2315"]
[BlackElo "2415"]
[PlyCount "153"]
[EventDate "2015.09.26"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 170 Extra"]
[Source "ChessBase"]
[SourceDate "2016.02.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.02.25"]
[SourceQuality "1"]
[WhiteTeam "BSG"]
[BlackTeam "Calder HMC"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 Nf6 5. Nc3 Be7 6. g3 d5 7. e5 Ng4 8. Bg2 0-0 9. Nxd5 Nxe5 10. Ne3 c6 11. 0-0 Bc5 12. Nb3 Bb6 13. Qxd8 Rxd8 14. Bd2 Be6 15. Bc3 Bxe3 16. Bxe5 Bb6 17. Rad1 Na6 18. Bc3 Bf5 19. Nd4 Bg6 20. Rd2 Nc5 21. Re1 Na4 22. Re7 Nxc3 23. bxc3 Ba5 24. Re3 Re8 25. Rde2 Kf8 26. Bf3 Rxe3 27. Rxe3 Re8 28. Rxe8+ Kxe8 29. Nb3 Bxc3 30. Nc5 Bxc2 31. Nxb7 Kd7 32. Nc5+ Kc7 33. Be4 Bxe4 34. Nxe4 Bf6 35. Kf1 Be7 36. Ke2 f5 37. Nd2 Kd6 38. Kd3 Kd5 39. Nc4 Bc5 40. f3 Bd6 41. Ne3+ Ke6 42. Nc2 g6 43. Kc4 h5 44. Nd4+ Kd7 45. f4 Be7 46. Nf3 Bf6 47. Kc5 Kc7 48. Kc4 Kd6 49. Ne1 h4 50. Nf3 hxg3 51. hxg3 c5 52. a4 a6 53. Nh2 Bd4 54. Nf3 Bf2 55. Ne5 Bxg3 56. Nxg6 Ke6 57. Kxc5 Kf6 58. Ne5 Bxf4 59. Nf3 Bc7 60. Kc6 Bd8 61. a5 Bxa5 62. Kb7 Bc3 63. Kxa6 Ke6 64. Kb5 Kd5 65. Ka4 Ke4 66. Ng5+ Kf4 67. Ne6+ Ke5 68. Ng5 f4 69. Kb3 Ba5 70. Kc2 Bd8 71. Nh3 f3 72. Kd2 Bb6 73. Ke1 Kf5 74. Kf1 Bd4 75. Nf2 Bxf2 76. Kxf2 Kf4 77. Kf1 1/2-1/2

[Event "NED-chT 1516"]
[Site "Netherlands"]
[Date "2016.01.09"]
[Round "5.9"]
[White "Meissner, Felix"]
[Black "Ondersteijn, Niels"]
[Result "0-1"]
[ECO "C41"]
[WhiteElo "2298"]
[BlackElo "2415"]
[PlyCount "56"]
[EventDate "2015.09.26"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 170 Extra"]
[Source "ChessBase"]
[SourceDate "2016.02.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.02.25"]
[SourceQuality "1"]
[WhiteTeam "SISSA"]
[BlackTeam "Calder HMC"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 Nf6 5. Nc3 Be7 6. Qf3 Nbd7 7. Bf4 Ne5 8. Bxe5 dxe5 9. Nf5 0-0 10. Rd1 Qe8 11. a3 Bxf5 12. Qxf5 Bc5 13. Rd3 Qe7 14. Nd5 Nxd5 15. Rxd5 Bd4 16. c3 g6 17. Qh3 Bb6 18. Qg3 c6 19. Rd2 Rad8 20. Bd3 Rd6 21. Re2 Rfd8 22. Bc2 Qe6 23. b3 Qd7 24. 0-0 Rd2 25. Rxd2 Qxd2 26. Bb1 Qb2 27. h4 h5 28. Qxe5 Qe2 0-1

[Event "NED-chT 1516"]
[Site "Netherlands"]
[Date "2015.12.12"]
[Round "4.3"]
[White "Ondersteijn, Niels"]
[Black "Leenhouts, Koen"]
[Result "1/2-1/2"]
[ECO "D97"]
[WhiteElo "2415"]
[BlackElo "2420"]
[PlyCount "91"]
[EventDate "2015.09.26"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 169 Extra"]
[Source "ChessBase"]
[SourceDate "2015.12.18"]
[SourceVersion "1"]
[SourceVersionDate "2015.12.18"]
[SourceQuality "1"]
[WhiteTeam "Calder HMC"]
[BlackTeam "Sas van Gent"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 0-0 7. e4 a6 8. Be2 b5 9. Qb3 c5 10. dxc5 Be6 11. Qc2 Nbd7 12. Be3 Rc8 13. Rd1 b4 14. Nd5 Bxd5 15. exd5 Nxc5 16. 0-0 Nce4 17. Qb3 Qd6 18. h3 Rfd8 19. Bc4 a5 20. Qd3 a4 21. Rc1 Qb8 22. Bd4 Nd6 23. Ba6 Rxc1 24. Rxc1 Qa8 25. Bb6 Re8 26. Rc6 Nxd5 27. Qxd5 Qxa6 28. Ng5 Rf8 29. Bc5 Qe2 30. Bxb4 Qxb2 31. Bxd6 exd6 32. Rc7 Qa1+ 33. Kh2 Qe5+ 34. Qxe5 Bxe5+ 35. g3 h6 36. Nf3 Rb8 37. Rc2 Bf6 38. Kg2 a3 39. Rd2 Rb6 40. Rd3 Bb2 41. Nd2 Rc6 42. Ne4 Rc1 43. Nxd6 Ra1 44. Nc4 Rxa2 45. Rd2 Kg7 46. Nxa3 1/2-1/2

