[Event "Titled Tuesday intern op 02nd Apr Late"]
[Site "Chess.com INT"]
[Date "2024.04.02"]
[Round "1"]
[White "Danielyan, Vahe"]
[Black "Van der Werf, Mark"]
[Result "0-1"]
[ECO "D35"]
[WhiteElo "2331"]
[BlackElo "2401"]
[PlyCount "80"]
[EventDate "2024.04.02"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CB15_2024"]
[SourceDate "2024.04.10"]
[SourceVersion "1"]
[SourceVersionDate "2024.04.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. cxd5 exd5 5. Nc3 c6 6. Bg5 Be7 7. e3 Bf5 8. Be2 0-0 9. 0-0 Nbd7 10. Nh4 Be6 11. Bd3 Ne4 12. Nxe4 dxe4 13. Bxe4 Bxg5 14. Nf3 Be7 15. Qc2 Nf6 16. Bd3 c5 17. dxc5 Rc8 18. b4 b6 19. Ba6 Rc7 20. Rfd1 Qa8 21. Bc4 Bxc4 22. Qxc4 bxc5 23. b5 Qe4 24. Qc3 Nd5 25. Qd2 Bf6 26. Rac1 Nb6 27. Qd6 Qe7 28. Qg3 Rd8 29. Re1 c4 30. Nd4 Bxd4 31. exd4 Qd7 32. Qf4 Nd5 33. Qf3 c3 34. g3 h6 35. Re5 c2 36. Qe4 Nf6 37. Qe2 Qxd4 38. Kg2 Qd1 39. Qe3 Qxc1 40. Qxc1 Rd1 0-1

[Event "Titled Tuesday intern op 02nd Apr Late"]
[Site "Chess.com INT"]
[Date "2024.04.02"]
[Round "10"]
[White "Demina, Marya"]
[Black "Van der Werf, Mark"]
[Result "0-1"]
[ECO "A43"]
[WhiteElo "1962"]
[BlackElo "2401"]
[PlyCount "86"]
[EventDate "2024.04.02"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CB15_2024"]
[SourceDate "2024.04.10"]
[SourceVersion "1"]
[SourceVersionDate "2024.04.10"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 c5 3. d5 d6 4. Nc3 Qa5 5. Bd2 b5 6. Ne4 Qa4 7. Nxf6+ gxf6 8. e3 a6 9. b3 Qe4 10. Bd3 Qxd5 11. e4 Qh5 12. c4 bxc4 13. Bxc4 Bb7 14. Qe2 Nd7 15. h3 Ne5 16. Nxe5 Qxe2+ 17. Kxe2 fxe5 18. f3 h5 19. h4 Bh6 20. Bxh6 Rxh6 21. Ke3 e6 22. g4 d5 23. exd5 exd5 24. Bd3 d4+ 25. Kf2 hxg4 26. fxg4 Bxh1 27. Rxh1 Ke7 28. g5 Rh5 29. Be2 Rhh8 30. Bf3 Rac8 31. Bd5 Rcd8 32. Bc4 e4 33. h5 e3+ 34. Kf3 Rdg8 35. Kf4 Rg7 36. Bd3 a5 37. h6 Rgg8 38. h7 Rg6 39. Rh6 Rxh6 40. gxh6 e2 41. Bxe2 Rxh7 42. Kg5 Rh8 43. Bd3 Ke6 0-1

[Event "Titled Tuesday intern op 02nd Apr Late"]
[Site "Chess.com INT"]
[Date "2024.04.02"]
[Round "5"]
[White "Goncharov, Vladimir"]
[Black "Van der Werf, Mark"]
[Result "1-0"]
[ECO "D35"]
[WhiteElo "2077"]
[BlackElo "2401"]
[PlyCount "93"]
[EventDate "2024.04.02"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CB15_2024"]
[SourceDate "2024.04.10"]
[SourceVersion "1"]
[SourceVersionDate "2024.04.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. e3 Nbd7 6. Rc1 h6 7. Bh4 0-0 8. cxd5 exd5 9. Bd3 c6 10. Nf3 Ne4 11. Bxe7 Qxe7 12. 0-0 Re8 13. a3 Nxc3 14. Rxc3 Nf6 15. Ne5 Ne4 16. Bxe4 dxe4 17. b4 f6 18. Nc4 Be6 19. Na5 Bd5 20. Qh5 a6 21. Rfc1 Rf8 22. Qf5 Qf7 23. Nc4 Bxc4 24. Rxc4 Rfe8 25. Rc5 Rad8 26. h3 Rd6 27. a4 Qe6 28. Qg6 Qf7 29. Qg4 Qe6 30. Qd1 Red8 31. b5 axb5 32. axb5 Kh7 33. bxc6 bxc6 34. Qg4 Qxg4 35. hxg4 Rd5 36. Rxc6 Rg5 37. f3 exf3 38. gxf3 Ra8 39. Kf2 Ra2+ 40. R1c2 Ra3 41. R6c5 Rxc5 42. dxc5 Ra7 43. c6 Rc7 44. e4 Kg6 45. Ke3 Kf7 46. Kd4 Ke6 47. Kc5 1-0

[Event "Titled Tuesday intern op 02nd Apr Late"]
[Site "Chess.com INT"]
[Date "2024.04.02"]
[Round "8"]
[White "Han, Yichen"]
[Black "Van der Werf, Mark"]
[Result "1-0"]
[ECO "D37"]
[WhiteElo "2414"]
[BlackElo "2401"]
[PlyCount "65"]
[EventDate "2024.04.02"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CB15_2024"]
[SourceDate "2024.04.10"]
[SourceVersion "1"]
[SourceVersionDate "2024.04.10"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. Nc3 Be7 5. Bf4 0-0 6. e3 a6 7. Rc1 dxc4 8. Bxc4 b5 9. Be2 Bb7 10. 0-0 Nbd7 11. Ne5 c5 12. Bf3 Bxf3 13. Qxf3 Nxe5 14. Bxe5 Nd7 15. Bg3 cxd4 16. exd4 Nf6 17. Rfd1 b4 18. Nb1 Nd5 19. Nd2 Bg5 20. Be5 Bxd2 21. Rxd2 Qg5 22. Rdc2 a5 23. g3 a4 24. h4 Qg6 25. Rc4 a3 26. b3 h6 27. Bd6 Rfd8 28. Bxb4 h5 29. Bd2 Rdb8 30. Rc5 Nf6 31. Bf4 Ne4 32. Bxb8 Nxc5 33. Qxa8 1-0

[Event "Titled Tuesday intern op 02nd Apr Late"]
[Site "Chess.com INT"]
[Date "2024.04.02"]
[Round "2"]
[White "Papayan, Oleg"]
[Black "Van der Werf, Mark"]
[Result "1-0"]
[ECO "C64"]
[WhiteElo "2183"]
[BlackElo "2401"]
[PlyCount "97"]
[EventDate "2024.04.02"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CB15_2024"]
[SourceDate "2024.04.10"]
[SourceVersion "1"]
[SourceVersionDate "2024.04.10"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. Bxc6 dxc6 5. Nc3 f6 6. d3 Ne7 7. Qe2 0-0 8. Be3 Bxe3 9. Qxe3 b6 10. d4 exd4 11. Qxd4 Qxd4 12. Nxd4 Bd7 13. 0-0-0 Rfd8 14. f3 a6 15. Nde2 Ng6 16. Rd2 Be8 17. Rhd1 Rxd2 18. Rxd2 Ne5 19. Nf4 Bf7 20. Nd1 Kf8 21. Ne3 g6 22. a3 a5 23. Nd3 Nd7 24. Ng4 Ke7 25. e5 f5 26. Ne3 c5 27. f4 c4 28. Nf2 Nc5 29. Rd4 Rd8 30. Rxd8 Kxd8 31. Kd2 Na4 32. Nfd1 Kd7 33. Nc3 Nc5 34. Ned5 h6 35. g3 b5 36. Nf6+ Kc6 37. Ne2 Ne4+ 38. Nxe4 fxe4 39. Ke3 b4 40. c3 bxa3 41. bxa3 Kd5 42. h4 c5 43. g4 Be6 44. Ng3 Bxg4 45. Nxe4 Bf5 46. Nd6 Bd3 47. Nb7 a4 48. Nd8 g5 49. fxg5 1-0

[Event "Titled Tuesday intern op 02nd Apr Late"]
[Site "Chess.com INT"]
[Date "2024.04.02"]
[Round "4"]
[White "Van der Werf, Mark"]
[Black "Bilan, Danila"]
[Result "1-0"]
[ECO "D30"]
[WhiteElo "2401"]
[BlackElo "2303"]
[PlyCount "67"]
[EventDate "2024.04.02"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CB15_2024"]
[SourceDate "2024.04.10"]
[SourceVersion "1"]
[SourceVersionDate "2024.04.10"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. e3 e6 5. Bd3 Nbd7 6. b3 Ne4 7. 0-0 f5 8. Ba3 Bxa3 9. Nxa3 0-0 10. Nc2 Qf6 11. Be2 a5 12. Nce1 Nc3 13. Qc2 Nxe2+ 14. Qxe2 a4 15. Nd3 b6 16. Nfe5 Nxe5 17. Nxe5 c5 18. Rfe1 Bb7 19. Nd7 Qg6 20. Nxf8 Rxf8 21. cxd5 Bxd5 22. f3 axb3 23. axb3 Bxb3 24. Reb1 Bd5 25. Rxb6 cxd4 26. exd4 h6 27. Re1 Re8 28. Kh1 Kh7 29. Qe5 Ra8 30. h3 Ra2 31. Re2 Ra1+ 32. Kh2 Bxf3 33. Qxe6 Bxe2 34. Qxg6+ 1-0

[Event "Titled Tuesday intern op 02nd Apr Late"]
[Site "Chess.com INT"]
[Date "2024.04.02"]
[Round "7"]
[White "Van der Werf, Mark"]
[Black "Dziewonski, Dariusz"]
[Result "0-1"]
[ECO "D37"]
[WhiteElo "2401"]
[BlackElo "2289"]
[PlyCount "96"]
[EventDate "2024.04.02"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CB15_2024"]
[SourceDate "2024.04.10"]
[SourceVersion "1"]
[SourceVersionDate "2024.04.10"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 Be7 5. Bf4 0-0 6. e3 Nbd7 7. a3 a6 8. c5 b6 9. cxb6 cxb6 10. h3 Bb7 11. Bd3 Ne4 12. 0-0 f5 13. Ne5 Nxe5 14. Bxe5 Bd6 15. Bxd6 Qxd6 16. Rc1 Rac8 17. Nxe4 dxe4 18. Be2 b5 19. Qd2 e5 20. Rfd1 exd4 21. Qxd4 Qxd4 22. exd4 Bd5 23. Rc5 Rfd8 24. Rdc1 Be6 25. b4 Kf7 26. Kf1 Ke7 27. d5 Rxc5 28. Rxc5 Rxd5 29. Rc6 Rd6 30. Rc7+ Kf6 31. Ke1 h6 32. g3 g5 33. Rh7 Kg6 34. Ra7 h5 35. Ra8 Bc4 36. Bd1 f4 37. gxf4 gxf4 38. Rh8 f3 39. Re8 Bd3 40. Ra8 Kf5 41. a4 Rg6 42. a5 Rg1+ 43. Kd2 Rf1 44. Rxa6 Rxf2+ 45. Ke3 Rf1 46. Bb3 Re1+ 47. Kf2 Rf1+ 48. Ke3 f2 0-1

[Event "Titled Tuesday intern op 02nd Apr Late"]
[Site "Chess.com INT"]
[Date "2024.04.02"]
[Round "6"]
[White "Van der Werf, Mark"]
[Black "Martin Duque, Jesus"]
[Result "1-0"]
[ECO "A47"]
[WhiteElo "2401"]
[BlackElo "2336"]
[PlyCount "127"]
[EventDate "2024.04.02"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CB15_2024"]
[SourceDate "2024.04.10"]
[SourceVersion "1"]
[SourceVersionDate "2024.04.10"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 b6 3. Bg5 Bb7 4. Bxf6 exf6 5. e3 g6 6. c4 Bg7 7. Nc3 0-0 8. g3 d6 9. Bg2 Nd7 10. 0-0 f5 11. Nh4 Qc8 12. Bxb7 Qxb7 13. Qf3 c6 14. Ng2 Rfe8 15. Nf4 a6 16. Rac1 b5 17. b3 Nf6 18. h4 h5 19. a4 b4 20. Nb1 Ne4 21. Qe2 c5 22. dxc5 dxc5 23. Nd5 Rad8 24. Kh2 f4 25. Nxf4 Qe7 26. Nd5 Qe5 27. Nd2 Nc3 28. Nxc3 bxc3 29. Nf3 Qf5 30. Rfd1 c2 31. Rxd8 Rxd8 32. Kg2 Rb8 33. e4 Qg4 34. Qxc2 Re8 35. Re1 Qc8 36. e5 Qb7 37. Qd3 Rxe5 38. Rxe5 Bxe5 39. Qd5 Qxd5 40. cxd5 Bd6 41. Nd2 Kf8 42. Nc4 Ke7 43. Kf3 f5 44. Ke3 Bb8 45. Kd3 f4 46. gxf4 Bxf4 47. Ke4 Bb8 48. Ne5 Kd6 49. Nxg6 Bc7 50. Nf4 Bd8 51. Nxh5 Bxh4 52. Ng3 Bg5 53. f4 Bf6 54. Nf5+ Kd7 55. Ne3 Kd6 56. Nc4+ Kd7 57. Kf5 Bd4 58. Kg6 Ke7 59. f5 Bc3 60. d6+ Kd7 61. f6 Ke8 62. f7+ Kf8 63. d7 Ke7 64. f8Q+ 1-0

[Event "Titled Tuesday intern op 02nd Apr Late"]
[Site "Chess.com INT"]
[Date "2024.04.02"]
[Round "9"]
[White "Van der Werf, Mark"]
[Black "Shamsi, Mohammadhossein"]
[Result "0-1"]
[ECO "A06"]
[WhiteElo "2401"]
[BlackElo "2217"]
[PlyCount "90"]
[EventDate "2024.04.02"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CB15_2024"]
[SourceDate "2024.04.10"]
[SourceVersion "1"]
[SourceVersionDate "2024.04.10"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. e3 e6 5. Bd3 Nbd7 6. b3 Bd6 7. Bb2 0-0 8. 0-0 Re8 9. Ne5 c5 10. Nd2 b6 11. f4 Bb7 12. Nxd7 Qxd7 13. dxc5 Bxc5 14. Bxf6 Bxe3+ 15. Kh1 gxf6 16. Qg4+ Kf8 17. Nf3 d4 18. Qh4 Ke7 19. Ne5 Qc7 20. Ng4 Rg8 21. Bxh7 Rh8 22. Qxf6+ Kd6 23. Nxe3 Rxh7 24. Rad1 Rah8 25. Nf5+ Kd7 26. Qxd4+ Kc8 27. Nd6+ Kb8 28. Nxb7 Rxh2+ 29. Kg1 Kxb7 30. Qe4+ Ka6 31. b4 Qe7 32. Rd3 Qxb4 33. Qe3 Rh1+ 34. Kf2 Rxf1+ 35. Kxf1 Qb1+ 36. Kf2 Qxa2+ 37. Rd2 Qxc4 38. Qa3+ Kb7 39. Rd7+ Kc6 40. Qxa7 Qxf4+ 41. Ke2 Qe4+ 42. Kf2 Qf5+ 43. Ke2 Qg4+ 44. Kf2 Rh5 45. Qc7+ Kb5 0-1

[Event "Titled Tuesday intern op 02nd Apr Late"]
[Site "Chess.com INT"]
[Date "2024.04.02"]
[Round "11"]
[White "Van der Werf, Mark"]
[Black "Swiatlowski, Lukasz"]
[Result "0-1"]
[ECO "E91"]
[WhiteElo "2401"]
[BlackElo "2199"]
[PlyCount "88"]
[EventDate "2024.04.02"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CB15_2024"]
[SourceDate "2024.04.10"]
[SourceVersion "1"]
[SourceVersionDate "2024.04.10"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 d6 5. e4 0-0 6. Be2 Bg4 7. Be3 Nfd7 8. Rc1 Nc6 9. d5 Ncb8 10. Nd4 Bxe2 11. Qxe2 c5 12. Nf3 a6 13. a4 Ne5 14. Nxe5 Bxe5 15. Bh6 Bg7 16. Qd2 e5 17. dxe6 fxe6 18. Bxg7 Kxg7 19. Rd1 Qf6 20. 0-0 Rd8 21. e5 Qxe5 22. Rfe1 Qf5 23. Ne4 Nc6 24. Nxd6 Qf6 25. Qe3 Nd4 26. Ne4 Qe5 27. f4 Qf5 28. b4 b6 29. bxc5 bxc5 30. Rb1 Ra7 31. Rb6 h6 32. h3 Rf8 33. Rf1 e5 34. Nd6 Qh5 35. f5 gxf5 36. Qxe5+ Kh7 37. Ne8 Raf7 38. Nf6+ Rxf6 39. Rxf6 Rg8 40. Rxa6 Qg5 41. Ra7+ Kg6 42. Qd6+ Kh5 43. Rf2 Qc1+ 44. Kh2 Qg5 0-1

[Event "Titled Tuesday intern op 02nd Apr Late"]
[Site "Chess.com INT"]
[Date "2024.04.02"]
[Round "3"]
[White "Van der Werf, Mark"]
[Black "Yang, Kaiqi"]
[Result "0-1"]
[ECO "E94"]
[WhiteElo "2401"]
[BlackElo "2481"]
[PlyCount "62"]
[EventDate "2024.04.02"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CB15_2024"]
[SourceDate "2024.04.10"]
[SourceVersion "1"]
[SourceVersionDate "2024.04.10"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 0-0 5. e4 d6 6. Be2 Nbd7 7. 0-0 e5 8. Be3 Qe7 9. Qc2 Re8 10. dxe5 dxe5 11. Nd5 Qd8 12. Rad1 c6 13. Nxf6+ Qxf6 14. c5 h6 15. Nd2 Bf8 16. b4 a5 17. a3 axb4 18. axb4 Nb8 19. Nc4 Na6 20. Nd6 Rd8 21. b5 Nxc5 22. Nxc8 Rdxc8 23. bxc6 Rxc6 24. Bb5 Rc7 25. Ra1 Rac8 26. Rac1 Ne6 27. Qd2 Bc5 28. Bd7 Rd8 29. Bxc5 Rxc5 30. Bxe6 Rxd2 31. Rxc5 Qxe6 0-1

[Event "EU-Cup 38th"]
[Site "Durres"]
[Date "2023.10.06"]
[Round "6.5"]
[White "Rademakers, Evert"]
[Black "Van der Werf, Mark"]
[Result "0-1"]
[ECO "A14"]
[WhiteElo "2256"]
[BlackElo "2399"]
[PlyCount "82"]
[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 "Paul Keres"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. b3 d5 2. Bb2 e6 3. Nf3 Nf6 4. g3 c5 5. Bg2 Be7 6. 0-0 0-0 7. c4 d4 8. b4 a5 9. bxc5 Nc6 10. d3 Bxc5 11. Nfd2 e5 12. Nb3 Be7 13. Ba3 Nb4 14. N1d2 Qc7 15. Ne4 Nxe4 16. Bxe4 Bh3 17. Re1 f5 18. Bh1 Rad8 19. Nd2 h6 20. c5 Bxc5 21. Qa4 b6 22. Rec1 Kh8 23. Nb3 f4 24. Bxb4 axb4 25. Qxb4 fxg3 26. hxg3 Qf7 27. Qe1 Bb4 28. Rc7 Bxe1 29. Rxf7 Rxf7 30. Rxe1 Ra7 31. Nd2 Be6 32. Nf3 Ra5 33. Rb1 Rb8 34. a3 Bg4 35. Nd2 Bxe2 36. Be4 Rxa3 37. Nc4 Bxd3 38. Nxa3 Bxe4 39. Re1 Bf3 40. Nc4 d3 41. Nd2 Be2 0-1

[Event "EU-Cup 38th"]
[Site "Durres"]
[Date "2023.10.03"]
[Round "3.4"]
[White "Boraso, Alessio"]
[Black "Van der Werf, Mark"]
[Result "1/2-1/2"]
[ECO "C27"]
[WhiteElo "2258"]
[BlackElo "2399"]
[PlyCount "126"]
[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 "Padova Obiettivo"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "ITA"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Bc4 Nf6 3. d3 Bc5 4. Nc3 c6 5. Nf3 d6 6. h3 b5 7. Bb3 a5 8. a4 b4 9. Ne2 Bb6 10. Ng3 0-0 11. 0-0 Nbd7 12. c3 d5 13. Re1 Re8 14. Bg5 h6 15. Bxf6 Nxf6 16. exd5 Nxd5 17. Rxe5 Be6 18. Qd2 bxc3 19. bxc3 Bc7 20. Ree1 Bxg3 21. Bxd5 Bxf2+ 22. Qxf2 Qxd5 23. Qd4 Red8 24. Qxd5 Bxd5 25. d4 Bxf3 26. gxf3 c5 27. Rad1 cxd4 28. cxd4 Rab8 29. Re5 Rb4 30. Rxa5 Rbxd4 31. Rxd4 Rxd4 32. Kf2 g5 33. Ra6 Kg7 34. Kg3 f6 35. Ra8 h5 36. Rb8 Rxa4 37. Rb2 Kg6 38. Rc2 Ra1 39. Rb2 Rd1 40. Ra2 Kf5 41. Ra5+ Kg6 42. Ra2 Rd5 43. Rb2 Ra5 44. Rc2 Ra3 45. Rb2 h4+ 46. Kf2 Ra4 47. Rc2 Kf5 48. Rd2 Ke5 49. Re2+ Kd5 50. Rd2+ Rd4 51. Ra2 Ke5 52. Ke3 Rd1 53. Ra5+ Ke6 54. Kf2 Rd2+ 55. Kg1 Rd5 56. Ra2 Ke5 57. Kf2 Rd4 58. Ke3 Rd5 59. Rb2 Ra5 60. Rc2 Ra3+ 61. Kf2 Kd4 62. Rd2+ Rd3 63. Ra2 Ke5 1/2-1/2

[Event "EU-Cup 38th"]
[Site "Durres"]
[Date "2023.10.01"]
[Round "1.4"]
[White "Favier, Alain"]
[Black "Van der Werf, Mark"]
[Result "1/2-1/2"]
[ECO "E32"]
[WhiteElo "2023"]
[BlackElo "2399"]
[PlyCount "144"]
[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 "Differdange"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "LUX"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 0-0 5. e4 d5 6. e5 Ne4 7. Bd3 c5 8. Nge2 cxd4 9. Nxd4 Nd7 10. Bf4 Ndc5 11. 0-0 Bxc3 12. bxc3 Bd7 13. Bxe4 Nxe4 14. Rfe1 Rc8 15. cxd5 exd5 16. Qb3 Nc5 17. Qd1 Ne6 18. Bd2 Nxd4 19. cxd4 Qb6 20. Rb1 Qxd4 21. Rxb7 Bg4 22. Rb4 Qxb4 23. Bxb4 Bxd1 24. Bxf8 Kxf8 25. Rxd1 Ke7 26. f4 Ke6 27. Rd2 Rc4 28. g3 d4 29. Kf2 Kd5 30. Rb2 Ra4 31. Rb7 Rxa2+ 32. Kf3 Ra3+ 33. Ke2 Ke6 34. Kd2 h5 35. Rb4 Ra2+ 36. Kd3 Rxh2 37. Kxd4 Rh3 38. Ke4 g6 39. Ra4 Rxg3 40. Ra6+ Ke7 41. Rxa7+ Kf8 42. e6 fxe6 43. Ke5 Rf3 44. Kf6 Rxf4+ 45. Kxg6 h4 46. Kg5 Rf7 47. Ra8+ Kg7 48. Kxh4 Rf1 49. Kg3 Kf7 50. Ra4 Ke7 51. Rf4 Ra1 52. Kf3 Ra3+ 53. Ke4 Kd6 54. Rf8 Ra4+ 55. Ke3 Ke5 56. Rb8 Ra3+ 57. Ke2 Kd5 58. Rb5+ Kd4 59. Rb4+ Kc5 60. Rb2 Rh3 61. Rb8 Kd4 62. Rb4+ Ke5 63. Ra4 Kf5 64. Kf2 e5 65. Ke2 Rb3 66. Kf2 Rd3 67. Ke2 Rd6 68. Ke3 Rb6 69. Ke2 e4 70. Ra8 Rd6 71. Rf8+ Ke5 72. Ke3 Rd3+ 1/2-1/2

[Event "NED-chT 2324"]
[Site "Netherlands"]
[Date "2023.09.16"]
[Round "1.3"]
[White "Schoppen, Casper"]
[Black "Van der Werf, Mark"]
[Result "1/2-1/2"]
[ECO "A77"]
[WhiteElo "2530"]
[BlackElo "2397"]
[PlyCount "95"]
[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 "Kennemer Combinatie"]
[BlackTeam "Leiden IntelliMagic"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 d6 5. Nc3 exd5 6. cxd5 g6 7. Nd2 Bg7 8. e4 0-0 9. Be2 Nbd7 10. 0-0 Re8 11. h3 a6 12. a4 b6 13. Re1 Rb8 14. Qc2 Qc7 15. Rb1 c4 16. Bxc4 b5 17. Bd3 b4 18. Ne2 Qxc2 19. Bxc2 Nc5 20. b3 Nfxe4 21. Nxe4 Nxe4 22. Ng3 Nf6 23. Bf4 Rd8 24. Ne4 Nxd5 25. Bxd6 Ra8 26. Bh2 Nc3 27. Nxc3 Bxc3 28. Bc7 Bxe1 29. Bxd8 Be6 30. Ba5 Bc3 31. Rd1 Rc8 32. Rd8+ Rxd8 33. Bxd8 Kf8 34. Kf1 Ke8 35. Bb6 Kd7 36. Ke2 h5 37. h4 Kc6 38. Bd8 Bd4 39. f3 Bc5 40. Bf6 Bb6 41. Bd1 Kd5 42. Kd2 Bd4 43. Be7 Bc3+ 44. Ke3 Bd4+ 45. Kf4 Bc3 46. Ke3 Bd4+ 47. Ke2 Bc3 48. Bc2 1/2-1/2

[Event "EU-ch Seniors 50 22nd"]
[Site "Acqui Terme"]
[Date "2023.06.03"]
[Round "9"]
[White "Dishman, Stephen"]
[Black "Van der Werf, Mark"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "2259"]
[BlackElo "2396"]
[PlyCount "110"]
[EventDate "2023.05.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ITA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. Bf4 d5 4. Nbd2 Bd6 5. Bg5 h6 6. Bxf6 Qxf6 7. e4 Qd8 8. e5 Be7 9. Bd3 c5 10. dxc5 Bxc5 11. 0-0 Nc6 12. c3 Bb6 13. Qe2 f5 14. exf6 Qxf6 15. Rae1 Bd7 16. Nb3 0-0 17. Nbd4 Bxd4 18. cxd4 Nxd4 19. Nxd4 Qxd4 20. Rd1 Qf4 21. g3 Qf3 22. Qe5 Rae8 23. Bg6 Rd8 24. Bb1 Kh8 25. Rd2 Bc6 26. Re1 Qf6 27. Qh5 Rfe8 28. Re5 d4 29. Be4 Bxe4 30. Rxe4 e5 31. f4 Qc6 32. Rxe5 Rxe5 33. fxe5 d3 34. Qd1 Qc5+ 35. Kf1 Qxe5 36. Rxd3 Qb5 37. Ke2 Qxb2+ 38. Kf3 Rf8+ 39. Kg4 Qxa2 40. Rd7 Qe6+ 41. Kh4 Rc8 42. g4 Qf6+ 43. Kh3 a5 44. Rd6 Qc3+ 45. Kh4 Kh7 46. Rd7 Qf6+ 47. Kh3 Rc3+ 48. Kg2 Qc6+ 49. Kf2 Qc5+ 50. Kg2 Rc2+ 51. Kf3 Qa3+ 52. Ke4 Rc4+ 53. Kd5 Qc5+ 54. Ke6 Qe3+ 55. Kd5 Rc5+ 0-1

[Event "EU-ch Seniors 50 22nd"]
[Site "Acqui Terme"]
[Date "2023.06.02"]
[Round "8"]
[White "Van der Werf, Mark"]
[Black "Sigfusson, Sigurdur Dadi"]
[Result "1/2-1/2"]
[ECO "E94"]
[WhiteElo "2396"]
[BlackElo "2279"]
[PlyCount "124"]
[EventDate "2023.05.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ITA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Be3 Nbd7 7. Nf3 e5 8. 0-0 Ng4 9. Bg5 f6 10. Bh4 g5 11. Bg3 Nh6 12. dxe5 dxe5 13. h4 c6 14. b4 a5 15. b5 Nf7 16. hxg5 fxg5 17. bxc6 bxc6 18. Qa4 Qf6 19. Qa3 Re8 20. Na4 h5 21. Nd2 Qh6 22. Rad1 Nd8 23. c5 Ne6 24. Nc4 Nd4 25. Rxd4 exd4 26. Nd6 Rf8 27. Qb3+ Kh7 28. Nf5 Qg6 29. Bd6 Re8 30. Ne7 Rxe7 31. Bxe7 Ne5 32. Bd6 Nf7 33. Bc4 Nxd6 34. cxd6 Qxd6 35. Nb6 Rb8 36. Nxc8 Rxc8 37. Qh3 Rf8 38. Qxh5+ Qh6 39. Qg4 Qh4 40. Qe6 Qh6 41. Qd7 Kh8 42. g3 Qh5 43. Re1 g4 44. Rf1 Be5 45. Be2 Rg8 46. Qe6 c5 47. Rc1 d3 48. Bxd3 Bd4 49. Bf1 Bxf2+ 50. Kxf2 Qh2+ 51. Ke1 Qxg3+ 52. Kd1 Rd8+ 53. Kc2 Qh2+ 54. Kb3 Qb8+ 55. Kc2 Qh2+ 56. Kb3 Rb8+ 57. Ka4 Rb4+ 58. Kxa5 Qc7+ 59. Ka6 Ra4+ 60. Kb5 Rb4+ 61. Ka6 Ra4+ 62. Kb5 Rb4+ 1/2-1/2

[Event "EU-ch Seniors 50 22nd"]
[Site "Acqui Terme"]
[Date "2023.06.01"]
[Round "7"]
[White "Wacker, Peter"]
[Black "Van der Werf, Mark"]
[Result "1/2-1/2"]
[ECO "C47"]
[WhiteElo "2265"]
[BlackElo "2396"]
[PlyCount "83"]
[EventDate "2023.05.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ITA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 5. Nxd4 Bb4 6. Nxc6 bxc6 7. Bd3 0-0 8. 0-0 d5 9. exd5 cxd5 10. h3 Rb8 11. Qf3 Rb6 12. Na4 Re6 13. Bg5 h6 14. Bh4 Qd7 15. a3 Qxa4 16. axb4 Qxb4 17. Bxf6 Rxf6 18. Qxd5 Qxb2 19. Rxa7 c6 20. Qc5 Be6 21. Ra6 Rc8 22. Rxc6 Rxc6 23. Qxc6 g6 24. Qc5 Kg7 25. Re1 Rf4 26. Qc7 Rf6 27. Qe5 Qxe5 28. Rxe5 Rf4 29. Kf1 Ra4 30. Ke2 Kf6 31. Re4 Ra5 32. Rb4 Ra1 33. h4 g5 34. hxg5+ hxg5 35. Bc4 Bg4+ 36. Ke3 Re1+ 37. Kd2 Rd1+ 38. Kc3 Rg1 39. Rb6+ Be6 40. Bd5 Ke5 41. Bb7 f5 42. Rb5+ 1/2-1/2

[Event "EU-ch Seniors 50 22nd"]
[Site "Acqui Terme"]
[Date "2023.05.31"]
[Round "6"]
[White "Van der Werf, Mark"]
[Black "Lacasa Diaz, Jose Antonio"]
[Result "1/2-1/2"]
[ECO "D33"]
[WhiteElo "2396"]
[BlackElo "2359"]
[PlyCount "48"]
[EventDate "2023.05.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ITA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 c5 5. cxd5 exd5 6. g3 Nc6 7. Bg2 cxd4 8. Nxd4 Bc5 9. Nb3 Bb6 10. 0-0 d4 11. Na4 0-0 12. Bg5 Re8 13. Re1 h6 14. Bxf6 Qxf6 15. Nxb6 axb6 16. Bxc6 bxc6 17. Qxd4 Qd8 18. Qxd8 Rxd8 19. Rad1 Rxd1 20. Rxd1 Be6 21. Nc1 Bxa2 22. Nxa2 Rxa2 23. Rd8+ Kh7 24. Rd6 Rxb2 1/2-1/2

[Event "EU-ch Seniors 50 22nd"]
[Site "Acqui Terme"]
[Date "2023.05.30"]
[Round "5"]
[White "Contin, Daniel"]
[Black "Van der Werf, Mark"]
[Result "1/2-1/2"]
[ECO "A13"]
[WhiteElo "2231"]
[BlackElo "2396"]
[PlyCount "67"]
[EventDate "2023.05.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ITA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 e6 3. b3 d5 4. Bb2 c5 5. e3 Nc6 6. cxd5 exd5 7. Bb5 Bd6 8. 0-0 0-0 9. d4 cxd4 10. Nxd4 Bc7 11. Ba3 Re8 12. Bxc6 bxc6 13. Nd2 Bd7 14. Rc1 Rc8 15. N2f3 Bb8 16. Qd3 Ne4 17. b4 a5 18. b5 c5 19. Nc6 Bxc6 20. bxc6 Qd6 21. Rfd1 Red8 22. Qb5 Rxc6 23. g3 Rb6 24. Qa4 h6 25. Nd2 Nxd2 26. Rxd2 Rc8 27. Qxa5 Ra6 28. Qc3 Qe6 29. Rcd1 Be5 30. Qc1 d4 31. Bxc5 dxe3 32. Rd8+ Rxd8 33. Rxd8+ Kh7 34. Qxe3 1/2-1/2

[Event "EU-ch Seniors 50 22nd"]
[Site "Acqui Terme"]
[Date "2023.05.29"]
[Round "4"]
[White "Van der Werf, Mark"]
[Black "Lasinskas, Povilas"]
[Result "1-0"]
[ECO "E44"]
[WhiteElo "2396"]
[BlackElo "2131"]
[PlyCount "125"]
[EventDate "2023.05.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ITA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Nge2 Bb7 6. a3 Bxc3+ 7. Nxc3 0-0 8. Bd3 d5 9. 0-0 Nbd7 10. b4 c5 11. bxc5 bxc5 12. Rb1 Bc6 13. cxd5 exd5 14. a4 c4 15. Bc2 a6 16. Ba3 Re8 17. e4 Nf8 18. e5 N6d7 19. Bd6 Re6 20. f4 Rxd6 21. exd6 Qf6 22. f5 Qxd6 23. Qd2 Qf6 24. Ne2 h6 25. Ng3 Nh7 26. Nh5 Qh4 27. Nf4 Qf6 28. Rfe1 Rc8 29. Re2 Ng5 30. Nh5 Qd8 31. Rbe1 Ne4 32. Bxe4 dxe4 33. d5 Bxa4 34. Rxe4 Nf6 35. Nxf6+ Qxf6 36. Qf4 Bb5 37. Qe5 Qb6+ 38. Qd4 Qxd4+ 39. Rxd4 c3 40. Rc1 Kf8 41. d6 Bd7 42. g4 h5 43. h3 hxg4 44. hxg4 c2 45. Kf2 f6 46. Ke3 g6 47. fxg6 Kg7 48. Rd2 Kxg6 49. Rcxc2 Re8+ 50. Kf4 Kf7 51. Rc7 Ke6 52. Ra7 Rd8 53. Re2+ Kd5 54. Rd2+ Ke6 55. Rxa6 Rb8 56. Rd4 Rb1 57. Ra3 Rb5 58. Re3+ Re5 59. Rh3 Rd5 60. Rxd5 Kxd5 61. Rh6 Kxd6 62. Rxf6+ Ke7 63. g5 1-0

[Event "EU-ch Seniors 50 22nd"]
[Site "Acqui Terme"]
[Date "2023.05.28"]
[Round "3"]
[White "Prie, Eric"]
[Black "Van der Werf, Mark"]
[Result "1/2-1/2"]
[ECO "D02"]
[WhiteElo "2352"]
[BlackElo "2396"]
[PlyCount "41"]
[EventDate "2023.05.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ITA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. Bf4 d5 4. e3 Bd6 5. Bg3 0-0 6. Nbd2 c5 7. c3 Qc7 8. dxc5 Qxc5 9. Bd3 Nbd7 10. e4 dxe4 11. Bxd6 Qxd6 12. Nxe4 Nxe4 13. Bxe4 Qf4 14. Bc2 b6 15. Qd4 Qxd4 16. Nxd4 Bb7 17. f3 Rfd8 18. 0-0-0 Nf6 19. Nb5 a6 20. Nd6 Bd5 21. Ne4 1/2-1/2

[Event "EU-ch Seniors 50 22nd"]
[Site "Acqui Terme"]
[Date "2023.05.27"]
[Round "2"]
[White "Van der Werf, Mark"]
[Black "Roatta, Luca"]
[Result "1-0"]
[ECO "D11"]
[WhiteElo "2396"]
[BlackElo "2122"]
[PlyCount "124"]
[EventDate "2023.05.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ITA"]
[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. Nf3 dxc4 4. e3 b5 5. a4 e6 6. axb5 cxb5 7. b3 Bb4+ 8. Bd2 Bxd2+ 9. Nbxd2 a5 10. bxc4 b4 11. c5 Ne7 12. Bb5+ Bd7 13. Qa4 0-0 14. Ne5 Bxb5 15. Qxb5 Qc7 16. 0-0 Nbc6 17. Nxc6 Nxc6 18. Nc4 Rfd8 19. Rfd1 Ra7 20. h3 h6 21. Nb6 Qb7 22. Rd2 Ra6 23. Qa4 Ra7 24. Rad1 Ne7 25. Rb2 Ra6 26. Ra1 Nc6 27. Nc4 Rb8 28. Nd6 Qc7 29. Nc4 Qb7 30. Nb6 Rd8 31. Qc2 Ra7 32. Qe4 Rb8 33. h4 Ne7 34. Qe5 Nd5 35. Nxd5 exd5 36. Rab1 Raa8 37. Qd6 Ra6 38. Qe5 Re6 39. Qg3 Rg6 40. Qe5 Re6 41. Qg3 Ree8 42. Qd6 Red8 43. Qe5 Qc6 44. f3 Rb7 45. h5 Rdb8 46. e4 dxe4 47. Qxe4 Rc7 48. Qxc6 Rxc6 49. Kf2 Kf8 50. Ke3 Ke7 51. Kd3 Kd7 52. Kc4 g6 53. Ra1 Ra6 54. hxg6 fxg6 55. d5 Rf8 56. Kb5 Raa8 57. Rxa5 Rxa5+ 58. Kxa5 Rf5 59. Rd2 b3 60. Kb6 b2 61. c6+ Kd6 62. Rxb2 Rf8 1-0

[Event "EU-ch Seniors 50 22nd"]
[Site "Acqui Terme"]
[Date "2023.05.26"]
[Round "1"]
[White "Tunge, Christian"]
[Black "Van der Werf, Mark"]
[Result "0-1"]
[ECO "A14"]
[WhiteElo "1991"]
[BlackElo "2396"]
[PlyCount "130"]
[EventDate "2023.05.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ITA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. c4 e6 2. g3 d5 3. Bg2 Nf6 4. Nf3 Be7 5. 0-0 0-0 6. b3 d4 7. e3 c5 8. exd4 cxd4 9. Re1 Nc6 10. d3 Bb4 11. Bd2 Bd6 12. Bg5 h6 13. Bxf6 Qxf6 14. Nbd2 Qe7 15. b4 Bxb4 16. Rb1 Bc3 17. Ne5 Qc7 18. f4 f6 19. Ng6 Rd8 20. Rf1 Bxd2 21. Qxd2 Bd7 22. h4 Be8 23. h5 Rab8 24. Rbe1 Bf7 25. g4 Ne7 26. Nxe7+ Qxe7 27. g5 fxg5 28. Re5 Qf6 29. Qe2 gxf4 30. Qe4 Rf8 31. Rxf4 Qe7 32. Bh3 Rbe8 33. Qxd4 Qa3 34. Rg4 Kh8 35. Rxg7 Rg8 36. Rxg8+ Kxg8 37. Re2 e5 38. Rxe5 Rxe5 39. Qxe5 Qxd3 40. Bf1 Qd8 41. c5 Qd5 42. Qxd5 Bxd5 43. Kf2 Kf7 44. a3 Kf6 45. Ke3 Ke5 46. Be2 Bc6 47. Bc4 Be8 48. Be2 Kd5 49. Bf3+ Kxc5 50. Bxb7 Bxh5 51. Kd3 Bg6+ 52. Kc3 h5 53. Bf3 h4 54. Bg4 Be4 55. Bh3 Kd5 56. Kb4 Ke5 57. a4 Kf4 58. a5 Kg3 59. Bc8 Bf3 60. Kc5 Bg4 61. Bxg4 Kxg4 62. Kc6 h3 63. Kb7 h2 64. Kxa7 h1Q 65. a6 Qc6 0-1

[Event "NED-chT 2223"]
[Site "Netherlands"]
[Date "2023.04.22"]
[Round "9.2"]
[White "L'Ami, Erwin"]
[Black "Van der Werf, Mark"]
[Result "1-0"]
[ECO "A77"]
[WhiteElo "2649"]
[BlackElo "2413"]
[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 "Apeldoorn Amevo"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 d6 5. Nc3 exd5 6. cxd5 g6 7. Nd2 Nbd7 8. e4 Bg7 9. Be2 0-0 10. 0-0 Re8 11. a4 Ne5 12. Ndb1 a6 13. f3 Rb8 14. Na3 Qc7 15. Be3 Bd7 16. Kh1 h6 17. Qd2 Kh7 18. Rab1 Bxa4 19. Nxa4 b5 20. Nxc5 dxc5 21. Rfc1 c4 22. Nc2 Qb7 23. Bd4 Ned7 24. Nb4 h5 25. Re1 Rbc8 26. Qc3 h4 27. Ra1 Ra8 28. Nc6 Qc7 29. Bf1 Qf4 30. Qe3 Nxd5 31. Qf2 Bxd4 32. Nxd4 N5f6 33. Ne2 Qg5 34. Ng1 Kg7 35. Nh3 Qh5 36. Rad1 Ne5 37. f4 Neg4 38. Qf3 Kf8 39. e5 Ng8 40. Ng5 N4h6 41. Qa3+ Kg7 42. Be2 1-0

[Event "NED-chT 2223"]
[Site "Netherlands"]
[Date "2023.04.01"]
[Round "8.4"]
[White "Van der Werf, Mark"]
[Black "Nijboer, Friso"]
[Result "0-1"]
[ECO "D20"]
[WhiteElo "2413"]
[BlackElo "2452"]
[PlyCount "92"]
[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 "Leiden LSG"]
[BlackTeam "Kennemer Combinatie"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 d5 2. c4 dxc4 3. e4 b5 4. a4 c6 5. axb5 cxb5 6. Nc3 Qb6 7. b3 e6 8. bxc4 Bb4 9. Bd2 bxc4 10. Bxc4 Ne7 11. Nf3 0-0 12. 0-0 a5 13. Qe2 Ba6 14. Rfc1 Bxc4 15. Qxc4 Nd7 16. Na4 Qb7 17. Qc7 Ra7 18. Qxb7 Rxb7 19. Rab1 h6 20. Kf1 f5 21. exf5 Rxf5 22. Bxb4 axb4 23. Nc5 Nxc5 24. dxc5 Nc6 25. Nd2 Ra7 26. Ne4 Ra2 27. Rd1 Rd5 28. Re1 Kf8 29. Rb3 Ra3 30. Rb2 Ke7 31. h3 e5 32. Rc1 Ke6 33. Re1 Rd4 34. f3 Kd5 35. Kf2 Rdd3 36. h4 b3 37. Kg3 Ra2 38. Ree2 Rxb2 39. Rxb2 Na5 40. Kf2 Nc4 41. Rb1 b2 42. Ke2 Re3+ 43. Kf2 Rxe4 44. fxe4+ Kxc5 45. Ke2 Kb4 46. Kd3 Kb3 0-1

[Event "NED-chT 2223"]
[Site "Netherlands"]
[Date "2023.03.11"]
[Round "7.9"]
[White "Van der Werf, Mark"]
[Black "Breukelman, Jan"]
[Result "1-0"]
[ECO "E59"]
[WhiteElo "2413"]
[BlackElo "2426"]
[PlyCount "109"]
[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 "Leiden LSG"]
[BlackTeam "Paul Keres"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Bd3 d5 6. a3 Bxc3+ 7. bxc3 dxc4 8. Bxc4 c5 9. Nf3 Qc7 10. Be2 Nc6 11. 0-0 Rd8 12. c4 e5 13. d5 e4 14. Nd2 Ne5 15. Bb2 Neg4 16. g3 Re8 17. Re1 Bf5 18. Bf1 Ne5 19. Qc2 Bg6 20. a4 Qd7 21. Bc3 Qf5 22. f4 exf3 23. Qxf5 Bxf5 24. Bxe5 Rxe5 25. Nxf3 Re7 26. h3 Rae8 27. Ra3 Ne4 28. g4 Bd7 29. a5 Nd6 30. Bd3 h5 31. gxh5 Bxh3 32. Kf2 Bg4 33. h6 Bxf3 34. Kxf3 g6 35. Ra2 Kh7 36. Rh2 Re5 37. Rh4 f5 38. Kf2 R8e7 39. Re2 g5 40. Rh2 Rf7 41. Re1 Rf6 42. Rh5 Nf7 43. Rb1 Re7 44. Ke2 Kh8 45. Kd2 f4 46. exf4 Rxf4 47. Rf1 Rxf1 48. Bxf1 Re4 49. Rh3 Nd6 50. Bd3 Rh4 51. Rg3 Nxc4+ 52. Bxc4 Rxc4 53. d6 Rf4 54. d7 Rf8 55. Re3 1-0

[Event "Leiden Noteboom Memorial 82nd"]
[Site "Leiden"]
[Date "2023.02.25"]
[Round "2"]
[White "Otten, Martijn"]
[Black "Van der Werf, Mark"]
[Result "1/2-1/2"]
[ECO "E46"]
[WhiteElo "2160"]
[BlackElo "2392"]
[PlyCount "116"]
[EventDate "2023.02.24"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[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. Nc3 Bb4 4. e3 0-0 5. Nge2 Re8 6. a3 Bf8 7. b4 d5 8. c5 b6 9. Ng3 a5 10. Rb1 axb4 11. axb4 bxc5 12. dxc5 e5 13. Bd3 g6 14. 0-0 h5 15. h3 Bb7 16. Qc2 h4 17. Nge2 Nbd7 18. e4 d4 19. Nd1 Ba6 20. Bg5 Bxd3 21. Qxd3 Ra4 22. Bxh4 Qa8 23. f3 Rb8 24. Be1 Ra3 25. Qc4 Bxc5 26. Nf2 Bd6 27. Bd2 Qa4 28. Qc1 Ra2 29. Ng3 Qc2 30. Qxc2 Rxc2 31. Rfd1 Nb6 32. Nd3 Nc4 33. Bg5 Nh7 34. Bh6 Nf8 35. Rdc1 Rxc1+ 36. Rxc1 Na3 37. Bd2 Ne6 38. h4 Nb5 39. h5 Ra8 40. hxg6 fxg6 41. Nc5 Bxc5 42. bxc5 Ra2 43. Nf1 c6 44. g3 d3 45. Kf2 Ned4 46. Ke3 Ra3 47. f4 Nc2+ 48. Kf2 Ra4 49. Ne3 exf4 50. gxf4 Rxe4 51. Kf3 Re6 52. Nxc2 dxc2 53. Be3 Na3 54. Bd4 Re8 55. Bb2 Rb8 56. Bxa3 Rb3+ 57. Ke4 Rxa3 58. Rxc2 Kf7 1/2-1/2

[Event "Leiden Noteboom Memorial 82nd"]
[Site "Leiden"]
[Date "2023.02.25"]
[Round "4"]
[White "Schoppen, Casper"]
[Black "Van der Werf, Mark"]
[Result "1-0"]
[ECO "C78"]
[WhiteElo "2497"]
[BlackElo "2392"]
[PlyCount "65"]
[EventDate "2023.02.24"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 212 Extra"]
[Source "ChessBase"]
[SourceDate "2023.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.03.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Bc5 6. c3 b5 7. Bb3 d6 8. d4 Bb6 9. a4 Bg4 10. h3 Bh5 11. Bg5 Rb8 12. Nbd2 h6 13. Bxf6 Qxf6 14. axb5 axb5 15. Qe2 Na7 16. Ra6 Bxf3 17. Nxf3 0-0 18. Rfa1 Rb7 19. Qd3 Re8 20. g3 g6 21. Kg2 Kg7 22. Bd5 c6 23. Bxc6 Nxc6 24. Qxb5 Reb8 25. Qxc6 exd4 26. Rd1 dxc3 27. Rxd6 cxb2 28. Rxf6 b1Q 29. Ne5 Qb3 30. Ra3 Qxa3 31. Rxf7+ Rxf7 32. Qxg6+ Kh8 33. Nxf7# 1-0

[Event "Leiden Noteboom Memorial 82nd"]
[Site "Leiden"]
[Date "2023.02.25"]
[Round "3"]
[White "Van der Werf, Mark"]
[Black "Slagboom, Leandro"]
[Result "1-0"]
[ECO "D50"]
[WhiteElo "2392"]
[BlackElo "2191"]
[PlyCount "63"]
[EventDate "2023.02.24"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 212 Extra"]
[Source "ChessBase"]
[SourceDate "2023.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.03.31"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. cxd5 cxd4 6. Qxd4 Be7 7. e4 Nc6 8. Qd2 exd5 9. Bxf6 Bxf6 10. exd5 Ne5 11. Bb5+ Bd7 12. Bxd7+ Qxd7 13. Nge2 0-0 14. 0-0 Rfd8 15. b3 Rac8 16. Rad1 Rc5 17. Qe3 b6 18. h3 Re8 19. Ne4 Rxd5 20. Rxd5 Qxd5 21. Nxf6+ gxf6 22. Nf4 Qb5 23. a4 Qc5 24. Qe4 f5 25. Qe2 Qc8 26. Nh5 Re6 27. Rd1 h6 28. Qb2 Kf8 29. Kh1 Qc6 30. Qd4 Qc5 31. Qd8+ Re8 32. Qf6 1-0

[Event "Leiden Noteboom Memorial 82nd"]
[Site "Leiden"]
[Date "2023.02.24"]
[Round "1"]
[White "Van der Werf, Mark"]
[Black "Labruyere, Roger"]
[Result "1-0"]
[ECO "E51"]
[WhiteElo "2392"]
[BlackElo "2081"]
[PlyCount "135"]
[EventDate "2023.02.24"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[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. Nc3 Bb4 4. e3 0-0 5. Bd3 d5 6. a3 dxc4 7. Bxc4 Be7 8. Nf3 c5 9. 0-0 a6 10. dxc5 Qxd1 11. Rxd1 Bxc5 12. b4 Be7 13. Be2 b5 14. Nd4 Bb7 15. Nb3 Nc6 16. Bb2 Rac8 17. Rac1 Rfd8 18. Bf3 Rxd1+ 19. Rxd1 Rd8 20. Nd4 Rc8 21. Nb3 Rd8 22. Rc1 Ba8 23. Ne2 Na7 24. Bxa8 Rxa8 25. Bd4 Nc8 26. Rc6 Nd6 27. Bxf6 gxf6 28. Na5 Rc8 29. Nd4 Kf8 30. Kf1 Rxc6 31. Ndxc6 Ke8 32. Ke2 Bd8 33. Kd3 Bxa5 34. Nxa5 Kd7 35. Kd4 Kc7 36. e4 Nc8 37. f4 Nb6 38. g4 Nd7 39. e5 fxe5+ 40. fxe5 Nf8 41. Nb3 Nd7 42. Nc5 Nb8 43. Nb3 Nd7 44. Ke4 Kc6 45. Nd2 Nb6 46. Kd4 Nd5 47. Ne4 Nb6 48. Ng5 Nc4 49. a4 Nd2 50. a5 h6 51. Nxf7 Nf3+ 52. Ke4 Nxh2 53. Nxh6 Nf1 54. g5 Ng3+ 55. Kd4 Nh5 56. g6 Ng7 57. Nf7 Nf5+ 58. Ke4 Ng7 59. Ng5 Kd7 60. Nf3 Nf5 61. Nd4 Ng7 62. Nb3 Nf5 63. Nc5+ Ke7 64. Nxa6 Ng3+ 65. Kf4 Ne2+ 66. Kg5 Nd4 67. Nc7 Nc6 68. a6 1-0

[Event "NED-chT 2223"]
[Site "Netherlands"]
[Date "2023.02.11"]
[Round "6.7"]
[White "Geirnaert, Steven"]
[Black "Van der Werf, Mark"]
[Result "0-1"]
[ECO "E20"]
[WhiteElo "2401"]
[BlackElo "2413"]
[PlyCount "66"]
[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 "Charlois Europoort"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 c5 5. d5 d6 6. e4 0-0 7. Nge2 b5 8. Nf4 exd5 9. Nfxd5 Nxd5 10. Qxd5 Qb6 11. cxb5 Bb7 12. Qd2 a6 13. a3 axb5 14. Rb1 Bxc3 15. bxc3 Ra5 16. Be2 Nd7 17. c4 f5 18. exf5 d5 19. cxd5 Rxf5 20. 0-0 c4+ 21. Kh1 Ra4 22. d6 Qc5 23. Qc2 Rf6 24. Bd2 Bc6 25. Bb4 Qf5 26. Qc3 Nb6 27. Rfd1 Ra8 28. Rbc1 Re8 29. Bf1 Rh6 30. Qd4 Nd5 31. Qc5 Qf4 32. h3 Nxb4 33. axb4 Rxh3+ 0-1

[Event "Tata Steel Qualifier 85th"]
[Site "Wijk aan Zee"]
[Date "2023.01.29"]
[Round "9"]
[White "Beukema, Stefan"]
[Black "Van der Werf, Mark"]
[Result "1-0"]
[ECO "A03"]
[WhiteElo "2411"]
[BlackElo "2412"]
[PlyCount "81"]
[EventDate "2023.01.20"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[EventCategory "5"]
[SourceTitle "CBM 212 Extra"]
[Source "ChessBase"]
[SourceDate "2023.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.03.31"]
[SourceQuality "1"]

1. f4 d5 2. Nf3 g6 3. g3 Bg7 4. Bg2 Nf6 5. d3 0-0 6. 0-0 Nc6 7. c3 Re8 8. Ne5 Nxe5 9. fxe5 Ng4 10. d4 f6 11. Qb3 c6 12. e4 Be6 13. h3 Nh6 14. Qxb7 dxe4 15. Qxc6 Bd5 16. Qa4 Nf5 17. c4 Bb7 18. d5 Nxg3 19. Re1 f5 20. Qb3 Qb6+ 21. Qxb6 axb6 22. Bf4 Nh5 23. Bh2 b5 24. cxb5 Bxd5 25. Nc3 e6 26. Red1 f4 27. Bxe4 Bxe4 28. Nxe4 Bxe5 29. a4 Bxb2 30. Ra2 Be5 31. a5 Reb8 32. Rb1 Ng3 33. Bxg3 fxg3 34. Kg2 Kf8 35. b6 Bd4 36. b7 Ra6 37. Rc2 Ke7 38. Rc7+ Kd8 39. Rbc1 Be5 40. Rf7 Ke8 41. Rxh7 1-0

[Event "Tata Steel Qualifier 85th"]
[Site "Wijk aan Zee"]
[Date "2023.01.28"]
[Round "8"]
[White "Van der Werf, Mark"]
[Black "Pijpers, Arthur"]
[Result "0-1"]
[ECO "A65"]
[WhiteElo "2412"]
[BlackElo "2445"]
[PlyCount "62"]
[EventDate "2023.01.20"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[EventCategory "5"]
[SourceTitle "CBM 212 Extra"]
[Source "ChessBase"]
[SourceDate "2023.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.03.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. h3 0-0 6. Bg5 c5 7. d5 e6 8. Bd3 exd5 9. cxd5 b5 10. Bxb5 h6 11. Bd2 Nbd7 12. Nge2 Rb8 13. Qc2 Nh5 14. g4 Ne5 15. 0-0-0 a6 16. Ba4 Nf6 17. Nb1 Nxe4 18. Qxe4 f5 19. Qc2 fxg4 20. Ng3 Rxf2 21. Rdf1 c4 22. Rxf2 Nd3+ 23. Qxd3 Bxb2+ 24. Kc2 cxd3+ 25. Kxd3 Be5 26. Ne4 Bf5 27. Nbc3 Qa5 28. Bb3 Bxe4+ 29. Nxe4 Rxb3+ 30. axb3 Qxd5+ 31. Ke3 Qd4+ 0-1

[Event "Tata Steel Qualifier 85th"]
[Site "Wijk aan Zee"]
[Date "2023.01.27"]
[Round "7"]
[White "Van der Werf, Mark"]
[Black "De Winter, Arthur"]
[Result "1/2-1/2"]
[ECO "D85"]
[WhiteElo "2412"]
[BlackElo "2371"]
[PlyCount "63"]
[EventDate "2023.01.20"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[EventCategory "5"]
[SourceTitle "CBM 212 Extra"]
[Source "ChessBase"]
[SourceDate "2023.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.03.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Qa4+ Nd7 8. Nf3 0-0 9. Qa3 c5 10. Be2 b6 11. e5 Bb7 12. h4 Rc8 13. h5 Qc7 14. h6 Bh8 15. 0-0 Bd5 16. Be3 f6 17. c4 Bf7 18. exf6 Bxf6 19. Rad1 cxd4 20. Nxd4 Ne5 21. Rc1 Qd7 22. c5 bxc5 23. Rxc5 Nc4 24. Bxc4 Bxc4 25. Rc1 Rxc5 26. Qxc5 Bxa2 27. Nc6 Bd5 28. Nxa7 Bb7 29. Qb5 Qxb5 30. Nxb5 Rc8 31. Rxc8+ Bxc8 32. f4 1/2-1/2

[Event "Tata Steel Qualifier 85th"]
[Site "Wijk aan Zee"]
[Date "2023.01.25"]
[Round "6"]
[White "Zwirs, Nico"]
[Black "Van der Werf, Mark"]
[Result "1-0"]
[ECO "E12"]
[WhiteElo "2467"]
[BlackElo "2412"]
[PlyCount "107"]
[EventDate "2023.01.20"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[EventCategory "5"]
[SourceTitle "CBM 212 Extra"]
[Source "ChessBase"]
[SourceDate "2023.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.03.31"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 b6 3. d4 Bb7 4. Nc3 e6 5. a3 Ne4 6. Nxe4 Bxe4 7. Nd2 Bg6 8. g3 d5 9. Bg2 Be7 10. e4 dxc4 11. Nxc4 Nd7 12. 0-0 0-0 13. Qe2 c5 14. dxc5 Bxc5 15. Rd1 Qc7 16. b4 Be7 17. Bf4 e5 18. Bh3 Rfd8 19. Rxd7 Rxd7 20. Nxe5 Rd6 21. Nc4 Bh5 22. Qxh5 Qxc4 23. Rc1 Qd4 24. Bxd6 Bxd6 25. Rd1 Qe5 26. Qxe5 Bxe5 27. Rd7 Bb2 28. a4 a5 29. bxa5 bxa5 30. Bf1 f6 31. Bc4+ Kh8 32. Bd5 Re8 33. h4 g6 34. f4 Ba3 35. Kg2 Bb4 36. Kf3 Be1 37. Rc7 Rd8 38. Rc1 Bb4 39. g4 f5 40. gxf5 gxf5 41. Rc7 h6 42. Rf7 fxe4+ 43. Bxe4 Rf8 44. Rh7+ Kg8 45. Bg6 Bd2 46. f5 Rf6 47. Ke4 Rb6 48. Rc7 Be1 49. h5 Bg3 50. Ra7 Be1 51. Rc7 Bg3 52. Rh7 Rb4+ 53. Kd5 Rxa4 54. f6 1-0

[Event "Tata Steel Qualifier 85th"]
[Site "Wijk aan Zee"]
[Date "2023.01.24"]
[Round "5"]
[White "Van der Werf, Mark"]
[Black "Martins, Vinicius Tine"]
[Result "1-0"]
[ECO "E49"]
[WhiteElo "2412"]
[BlackElo "2320"]
[PlyCount "109"]
[EventDate "2023.01.20"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[EventCategory "5"]
[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. Nc3 Bb4 4. e3 0-0 5. Bd3 d5 6. a3 Bxc3+ 7. bxc3 c5 8. cxd5 exd5 9. Ne2 Nc6 10. f3 Re8 11. 0-0 Qd6 12. Qe1 Bd7 13. Rb1 b6 14. Qh4 Ne7 15. g4 Ng6 16. Qg3 Qxg3+ 17. Nxg3 h6 18. Bd2 Rac8 19. Nf5 Bxf5 20. Bxf5 Rc7 21. Bd3 Ne7 22. h4 Nc6 23. g5 hxg5 24. hxg5 Nd7 25. g6 Na5 26. gxf7+ Kxf7 27. e4 cxd4 28. cxd4 Nc4 29. Bf4 Rcc8 30. Rb5 Nxa3 31. Rxd5 Nf6 32. Rg5 Rc3 33. Ba6 Rd8 34. d5 b5 35. Bd2 Rd3 36. Bb4 Nc2 37. Ba5 Rb8 38. Bc7 Rh8 39. Bxb5 Rc3 40. Be5 Rc5 41. Bd3 Nb4 42. Be2 a5 43. Bd6 Rc2 44. Bd1 Rc3 45. Be5 Rd3 46. Bc7 Ra8 47. Ba4 Ra3 48. Bb5 Rc3 49. Be5 Rc2 50. Ra1 Rc5 51. Bf1 a4 52. Rb1 a3 53. Rxb4 Ra7 54. Rb1 a2 55. Ra1 1-0

[Event "Tata Steel Qualifier 85th"]
[Site "Wijk aan Zee"]
[Date "2023.01.23"]
[Round "4"]
[White "Pham, Khoi"]
[Black "Van der Werf, Mark"]
[Result "1/2-1/2"]
[ECO "C92"]
[WhiteElo "2353"]
[BlackElo "2412"]
[PlyCount "93"]
[EventDate "2023.01.20"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[EventCategory "5"]
[SourceTitle "CBM 212 Extra"]
[Source "ChessBase"]
[SourceDate "2023.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.03.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0-0 9. h3 Re8 10. d4 Bb7 11. Nbd2 Bf8 12. a4 h6 13. Bc2 exd4 14. cxd4 Nb4 15. Bb1 c5 16. d5 Nd7 17. Ra3 c4 18. Nd4 Qf6 19. N2f3 Nc5 20. b3 Nbd3 21. Bxd3 Nxd3 22. Re3 Nxc1 23. bxc4 Rac8 24. Qxc1 Rxc4 25. Qd2 b4 26. Ra2 a5 27. Rc2 Rec8 28. Rxc4 Rxc4 29. Nb3 Qd8 30. Nfd4 Qb6 31. Rf3 Be7 32. Qf4 Bf6 33. Nf5 Bxd5 34. Nxd6 Rc6 35. exd5 Rxd6 36. Qc4 Qd8 37. Rd3 Qe8 38. g3 Qxa4 39. Qc5 Be7 40. Nxa5 Rd7 41. Qc8+ Rd8 42. Qc7 Rd7 43. Qb8+ Rd8 44. Qb6 Qd7 45. Nc6 Ra8 46. Kg2 Ra3 47. Qe3 1/2-1/2

[Event "Tata Steel Qualifier 85th"]
[Site "Wijk aan Zee"]
[Date "2023.01.22"]
[Round "3"]
[White "Van der Werf, Mark"]
[Black "Van Dael, Siem"]
[Result "1/2-1/2"]
[ECO "E92"]
[WhiteElo "2412"]
[BlackElo "2291"]
[PlyCount "106"]
[EventDate "2023.01.20"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[EventCategory "5"]
[SourceTitle "CBM 212 Extra"]
[Source "ChessBase"]
[SourceDate "2023.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.03.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 e5 7. Be3 Ng4 8. Bg5 f6 9. Bh4 Nc6 10. d5 Ne7 11. Nd2 f5 12. Bxg4 fxg4 13. Bg5 h6 14. Be3 c5 15. Rb1 Bd7 16. b4 b6 17. 0-0 Kh7 18. bxc5 dxc5 19. a4 Nc8 20. a5 Nd6 21. Qb3 Rb8 22. Rb2 Qc7 23. Rfb1 Rb7 24. Qa3 h5 25. Ne2 Rc8 26. Nc3 Rf8 27. Rb3 Bh6 28. Bxh6 Kxh6 29. Ne2 b5 30. cxb5 Bxb5 31. Nc3 a6 32. Nd1 Rf4 33. Qc1 Kh7 34. g3 Rf7 35. Rc3 c4 36. Qa3 Qd8 37. Ne3 Rbc7 38. Rf1 Kg8 39. Qa1 Rf8 40. Qa2 Qc8 41. Qa3 Rf6 42. Qb4 Qf8 43. Ng2 Rcf7 44. Qc5 Qd8 45. Qb6 Qf8 46. Qc5 Kh7 47. Qe3 Kg7 48. Qc5 Qd8 49. Qb6 Qf8 50. Qc5 Kg8 51. Qe3 Kg7 52. Qc5 Kg8 53. Qe3 Rf3 1/2-1/2

[Event "Tata Steel Qualifier 85th"]
[Site "Wijk aan Zee"]
[Date "2023.01.21"]
[Round "2"]
[White "Culum, Sanjin"]
[Black "Van der Werf, Mark"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "2242"]
[BlackElo "2412"]
[PlyCount "73"]
[EventDate "2023.01.20"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[EventCategory "5"]
[SourceTitle "CBM 212 Extra"]
[Source "ChessBase"]
[SourceDate "2023.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.03.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. c3 d6 6. 0-0 h6 7. Re1 0-0 8. h3 a5 9. d4 Ba7 10. Bb3 Re8 11. Bc2 b5 12. a4 b4 13. Be3 bxc3 14. bxc3 exd4 15. cxd4 Nb4 16. Nc3 Bb7 17. d5 c6 18. dxc6 Bxc6 19. Bxa7 Rxa7 20. Nd4 Rc7 21. Bb1 Bb7 22. Ra3 Rc4 23. Nf5 Re6 24. e5 Ne8 25. exd6 Rxe1+ 26. Qxe1 Nf6 27. Nb5 Bc8 28. Rc3 Rxc3 29. Qxc3 Be6 30. Qc7 Qa8 31. Ne7+ Kf8 32. Bf5 Nbd5 33. Nxd5 Nxd5 34. Bxe6 Nxc7 35. dxc7 fxe6 36. Nd6 Ke7 37. c8Q 1-0

[Event "Tata Steel Qualifier 85th"]
[Site "Wijk aan Zee"]
[Date "2023.01.20"]
[Round "1"]
[White "Van der Werf, Mark"]
[Black "Lopez, Jasel"]
[Result "1/2-1/2"]
[ECO "D12"]
[WhiteElo "2412"]
[BlackElo "2434"]
[PlyCount "52"]
[EventDate "2023.01.20"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[EventCategory "5"]
[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. Nf3 Nf6 4. e3 Bf5 5. Nc3 e6 6. Nh4 Bg4 7. Qb3 Qc7 8. h3 Bh5 9. g4 Bg6 10. Nxg6 hxg6 11. g5 dxc4 12. Bxc4 Nd5 13. Bd2 Be7 14. f4 Nd7 15. Rc1 Qb8 16. Kf2 a5 17. Be2 Qa7 18. a3 a4 19. Qc4 Bd6 20. Kg2 Qb8 21. Ne4 Bc7 22. h4 Ba5 23. Nc3 Qd6 24. Ne4 Qb8 25. Nc3 Qd6 26. Ne4 Qb8 1/2-1/2

[Event "NED-chT 2223"]
[Site "Netherlands"]
[Date "2022.12.17"]
[Round "5.7"]
[White "Van der Werf, Mark"]
[Black "Smeets, Sjo"]
[Result "1-0"]
[ECO "A91"]
[WhiteElo "2413"]
[BlackElo "1954"]
[PlyCount "79"]
[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 "Leiden LSG"]
[BlackTeam "De Stukkenjagers"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 f5 2. g3 Nf6 3. Bg2 d5 4. c4 e6 5. Qc2 Be7 6. Nh3 0-0 7. 0-0 c6 8. Nd2 Na6 9. a3 Bd7 10. Nf4 Nc7 11. Nf3 Be8 12. Bd2 Ne4 13. Ba5 b6 14. Bb4 a5 15. Bxe7 Qxe7 16. Rfd1 Rc8 17. Rac1 g5 18. Nd3 f4 19. Qb3 fxg3 20. fxg3 dxc4 21. Rxc4 g4 22. Nfe5 Qg5 23. Nf4 Nd6 24. Rcc1 Rxf4 25. gxf4 Qxf4 26. Qg3 Qxg3 27. hxg3 Nd5 28. Nxg4 h5 29. Bxd5 exd5 30. Nf6+ Kg7 31. Nxe8+ Nxe8 32. Rc3 Nd6 33. Rdc1 Nc4 34. b3 Nxa3 35. Rxc6 Re8 36. Rxb6 Rxe2 37. Rc7+ Kf8 38. Rb8+ Re8 39. Rxe8+ Kxe8 40. Rc5 1-0

[Event "NED-chT 2223"]
[Site "Netherlands"]
[Date "2022.11.26"]
[Round "4.3"]
[White "Van der Werf, Mark"]
[Black "Van Meegen, Ruud"]
[Result "1-0"]
[ECO "E49"]
[WhiteElo "2413"]
[BlackElo "2282"]
[PlyCount "99"]
[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 "Leiden LSG"]
[BlackTeam "Zuid Limburg"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Bd3 d5 6. a3 Bxc3+ 7. bxc3 c5 8. cxd5 exd5 9. Ne2 Nc6 10. f3 Re8 11. 0-0 h5 12. Qe1 Be6 13. Qh4 Ne7 14. Ng3 Ng6 15. Qg5 h4 16. Nf5 Nh7 17. Qxd8 Raxd8 18. g3 Bxf5 19. Bxf5 Ne7 20. Bd3 hxg3 21. hxg3 Nc8 22. Rb1 Re7 23. Rb5 cxd4 24. cxd4 Nf6 25. Bd2 b6 26. Kf2 Rc7 27. Rc1 Ne8 28. Rb2 Ne7 29. Rxc7 Nxc7 30. Rc2 Ne6 31. Bb4 Kf8 32. a4 f6 33. Bg6 Rb8 34. Rc1 a5 35. Ba3 Nc5 36. dxc5 Nxg6 37. cxb6+ Ke8 38. Rb1 Ne5 39. Bd6 Rb7 40. Bxe5 fxe5 41. Rb5 e4 42. f4 Kf7 43. Ke2 Ke6 44. Kd2 Kf5 45. Kc3 Kg4 46. Kd4 Kxg3 47. Kxd5 Kf3 48. Kc6 Rb8 49. Rb3 Rd8 50. b7 1-0

[Event "NED-chT 2223"]
[Site "Netherlands"]
[Date "2022.11.05"]
[Round "3.3"]
[White "De Schampheleire, Glen"]
[Black "Van der Werf, Mark"]
[Result "1-0"]
[ECO "A21"]
[WhiteElo "2379"]
[BlackElo "2413"]
[PlyCount "85"]
[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 "Sas van Gent"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. c4 e5 2. Nc3 Bb4 3. Qb3 a5 4. Nd5 Nf6 5. Nxb4 axb4 6. Nf3 e4 7. Nd4 c5 8. Nb5 d5 9. d3 exd3 10. cxd5 0-0 11. Qxd3 Qb6 12. e4 Bd7 13. Bf4 Nxe4 14. Nc7 Bf5 15. Nxa8 Qa5 16. Qb5 Qxa8 17. Bd3 Bd7 18. Qc4 Nf6 19. 0-0 b6 20. Rfd1 Bc8 21. a3 bxa3 22. Rxa3 Qb7 23. Be2 Nbd7 24. Re3 Qa8 25. Re7 Bb7 26. Bf3 h6 27. h3 Qa5 28. Bd2 Qa8 29. Bc3 Qb8 30. Qh4 Ba8 31. Qg3 Qxg3 32. fxg3 Rd8 33. Bxf6 Nxf6 34. d6 Bxf3 35. gxf3 Ne8 36. Rb7 Rxd6 37. Rxd6 Nxd6 38. Rb8+ Kh7 39. Rxb6 Nc4 40. Rb5 Kg6 41. Kf2 Kf6 42. Ke2 Ke6 43. b3 1-0

[Event "EU-Cup 37th"]
[Site "Mayrhofen"]
[Date "2022.10.09"]
[Round "7.3"]
[White "Gorshtein, Ido"]
[Black "Van der Werf, Mark"]
[Result "1/2-1/2"]
[ECO "A20"]
[WhiteElo "2471"]
[BlackElo "2399"]
[PlyCount "83"]
[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 "Kfar Saba"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "ISR"]
[BlackTeamCountry "NED"]

1. c4 e5 2. g3 c6 3. Nf3 e4 4. Nd4 d5 5. cxd5 Qxd5 6. Nc2 Nf6 7. Nc3 Qe5 8. Bg2 Na6 9. 0-0 Be7 10. Ne1 Bf5 11. f3 exf3 12. Nxf3 Qe6 13. a3 0-0 14. b4 Rad8 15. Bb2 Ne4 16. Nxe4 Bxe4 17. d3 Bf6 18. Qc2 Bxf3 19. Bxf3 Bxb2 20. Qxb2 Nc7 21. Rf2 Nb5 22. Raf1 Nd4 23. Be4 f5 24. e3 fxe4 25. Rxf8+ Rxf8 26. Rxf8+ Kxf8 27. Qxd4 exd3 28. Qxd3 Kf7 29. Qd4 b6 30. e4 Kg6 31. a4 h5 32. h4 Kf7 33. a5 g6 34. e5 Qd5 35. Qf2+ Ke8 36. axb6 axb6 37. Qxb6 Qd1+ 38. Kf2 Qd2+ 39. Kf3 Qd1+ 40. Kf2 Qd2+ 41. Kf3 Qd1+ 42. Kf2 1/2-1/2

[Event "NED-chT 2223"]
[Site "Netherlands"]
[Date "2022.10.08"]
[Round "2.4"]
[White "Van Foreest, Jorden"]
[Black "Van der Werf, Mark"]
[Result "1-0"]
[ECO "A43"]
[WhiteElo "2690"]
[BlackElo "2413"]
[PlyCount "93"]
[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 "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. Nf3 c5 3. d5 e6 4. Nc3 Nxd5 5. Nxd5 exd5 6. Qxd5 Nc6 7. e4 d6 8. Bc4 Be6 9. Qd3 Nb4 10. Qe2 Bxc4 11. Qxc4 d5 12. exd5 Qxd5 13. Qe2+ Be7 14. 0-0 Qe6 15. Qxe6 fxe6 16. c3 Nd3 17. Rb1 0-0 18. Be3 Bf6 19. Rfd1 Rfd8 20. Nd2 b5 21. Kf1 c4 22. Ke2 Rd5 23. b3 cxb3 24. axb3 Rad8 25. Ne4 R5d7 26. Nxf6+ gxf6 27. Ra1 e5 28. g3 e4 29. b4 a6 30. Rd2 Rc8 31. Bd4 Rc6 32. Ke3 Re6 33. Rda2 Rdd6 34. f4 f5 35. g4 fxg4 36. f5 Re8 37. Rxa6 Rxa6 38. Rxa6 Ne1 39. Re6 Rf8 40. Rxe4 Rxf5 41. Rxg4+ Kf7 42. Rg7+ Ke6 43. Rxh7 Kd5 44. Rc7 Nc2+ 45. Kd3 Nxd4 46. Rc5+ Kd6 47. Kxd4 1-0

[Event "EU-Cup 37th"]
[Site "Mayrhofen"]
[Date "2022.10.07"]
[Round "5.3"]
[White "Van der Werf, Mark"]
[Black "Bogner, Sebastian"]
[Result "1/2-1/2"]
[ECO "E54"]
[WhiteElo "2399"]
[BlackElo "2548"]
[PlyCount "46"]
[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 "Leiden LSG"]
[BlackTeam "Bayern Muenchen"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "GER"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Bd3 d5 6. Nf3 dxc4 7. Bxc4 c5 8. 0-0 cxd4 9. exd4 b6 10. Ne5 Bb7 11. Bg5 Nbd7 12. Nxd7 Qxd7 13. Bxf6 gxf6 14. d5 Bxc3 15. bxc3 Bxd5 16. Qg4+ Kh8 17. Qh4 Bxc4 18. Qxf6+ Kg8 19. Qg5+ Kh8 20. Qf6+ Kg8 21. Qg5+ Kh8 22. Qf6+ Kg8 23. Rfd1 Qd8 1/2-1/2

[Event "EU-Cup 37th"]
[Site "Mayrhofen"]
[Date "2022.10.04"]
[Round "2.3"]
[White "Van der Werf, Mark"]
[Black "Wojtaszek, Radoslaw"]
[Result "1/2-1/2"]
[ECO "E54"]
[WhiteElo "2399"]
[BlackElo "2693"]
[PlyCount "70"]
[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 "Leiden LSG"]
[BlackTeam "Novy Bor"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "CZE"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Bd3 d5 6. Nf3 dxc4 7. Bxc4 c5 8. 0-0 Nc6 9. Ne2 cxd4 10. Nexd4 Nxd4 11. Qxd4 Qxd4 12. Nxd4 Bd7 13. a3 Bc5 14. Rd1 Rfd8 15. b3 Rac8 16. Bb2 Kf8 17. Rac1 Ke7 18. h3 Ne4 19. Bd3 Nf6 20. Be2 Bd6 21. Nb5 Bxb5 22. Bxb5 Rxc1 23. Rxc1 g6 24. Be2 Ne4 25. Rd1 Rc8 26. Rc1 Rxc1+ 27. Bxc1 Be5 28. a4 b6 29. Bc4 Bc3 30. f3 Nd2 31. Bxd2 Bxd2 32. Kf2 Kd6 33. Ke2 Bc1 34. f4 h5 35. g4 hxg4 1/2-1/2

[Event "NED-chT 2223"]
[Site "Netherlands"]
[Date "2022.09.17"]
[Round "1.10"]
[White "Van der Werf, Mark"]
[Black "Van der Eijk, Martijn"]
[Result "1-0"]
[ECO "E49"]
[WhiteElo "2413"]
[BlackElo "2240"]
[PlyCount "131"]
[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 "Leiden LSG"]
[BlackTeam "Amstelveen Zukertort"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Bd3 d5 6. a3 Bxc3+ 7. bxc3 dxc4 8. Bxc4 c5 9. Ne2 Qc7 10. Ba2 b6 11. 0-0 Bb7 12. f3 Rd8 13. e4 Nc6 14. Bg5 cxd4 15. cxd4 Nxd4 16. Nxd4 Qc3 17. Bd5 Nxd5 18. Bxd8 Ne3 19. Ne2 Qc8 20. Rc1 Qxd8 21. Qxd8+ Rxd8 22. Rfe1 Ba6 23. Kf2 Nc4 24. Red1 Rb8 25. Rc3 g5 26. Rd7 Nb2 27. Nc1 Bb5 28. Rd4 a6 29. Rc2 Na4 30. Nb3 Kg7 31. e5 Kg6 32. Kg3 h6 33. h4 Rg8 34. hxg5 hxg5 35. Rg4 Rd8 36. Rd4 Rh8 37. Rc7 Rh1 38. Rd8 Rh7 39. Rg8+ Rg7 40. Rxg7+ Kxg7 41. Nd4 Kg6 42. Rc8 Bf1 43. Kf2 Bd3 44. Ke3 Nb2 45. g3 Kg7 46. Nb3 Bc4 47. Nd2 Bd5 48. Rb8 Na4 49. Kd4 f6 50. Ne4 fxe5+ 51. Kxe5 Nc5 52. Nxc5 bxc5 53. Rb6 Bxf3 54. Rxa6 Bd5 55. a4 Kg6 56. g4 c4 57. a5 c3 58. Ra7 Bf3 59. Rc7 Bxg4 60. a6 Bf3 61. Rxc3 Bd5 62. Rd3 Bh1 63. a7 g4 64. Kf4 e5+ 65. Kxg4 Kf6 66. Rd8 1-0

[Event "NED-chT 2122"]
[Site "Netherlands"]
[Date "2022.05.21"]
[Round "5.5"]
[White "De Wit, Michel"]
[Black "Van der Werf, Mark"]
[Result "0-1"]
[ECO "C92"]
[WhiteElo "2191"]
[BlackElo "2393"]
[PlyCount "130"]
[EventDate "2021.09.18"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]
[WhiteTeam "Charlois Europoort"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0-0 9. h3 Re8 10. Ng5 Rf8 11. Nf3 h6 12. d4 Bb7 13. a4 Re8 14. Nbd2 Bf8 15. d5 Na5 16. Bc2 c6 17. dxc6 Bxc6 18. Qe2 Nb7 19. axb5 axb5 20. Rxa8 Qxa8 21. Bd3 Qa6 22. Nb3 Qa4 23. Qc2 Nc5 24. Nxc5 Qxc2 25. Bxc2 dxc5 26. Kf1 c4 27. Ng1 Nd7 28. Be3 Ra8 29. Nf3 Ra2 30. Bc1 b4 31. cxb4 Bxb4 32. Rd1 f6 33. Ne1 Nc5 34. f3 Bb5 35. Kg1 Bxe1 36. Rxe1 c3 37. Be3 Rxb2 38. Bxc5 Rxc2 39. Bb4 Ba4 40. Kh2 Bb5 41. h4 h5 42. Kg1 Kf7 43. Kh2 Be2 44. Kg1 Ke6 45. Ra1 Bb5 46. Rd1 f5 47. Rd6+ Kf7 48. Rd1 fxe4 49. fxe4 Bc6 50. Re1 Kf6 51. Kh2 g6 52. Re3 Ra2 53. Bxc3 Ra4 54. Rf3+ Ke6 55. Re3 Bxe4 56. Re2 Ra3 57. Be1 Bd5 58. Bg3 e4 59. Bf4 Bc6 60. Kg1 Rb3 61. Kf2 Kf5 62. Bg5 Ke5 63. Rc2 Bb5 64. Rc7 Rb2+ 65. Ke3 Re2# 0-1

[Event "NED-chT 2122"]
[Site "Netherlands"]
[Date "2022.04.23"]
[Round "9.3"]
[White "Roggeveen, Pieter"]
[Black "Van der Werf, Mark"]
[Result "0-1"]
[ECO "B14"]
[WhiteElo "2229"]
[BlackElo "2393"]
[PlyCount "138"]
[EventDate "2021.09.18"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]
[WhiteTeam "Kennemer Combinatie"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. Nf3 Nf6 2. c4 e6 3. e3 c5 4. Nc3 d5 5. cxd5 exd5 6. d4 cxd4 7. exd4 Bb4 8. Bb5+ Bd7 9. Bd3 0-0 10. 0-0 Bg4 11. h3 Bh5 12. Bg5 Bxc3 13. bxc3 Nbd7 14. Qd2 Bxf3 15. gxf3 Qc7 16. Bf4 Qc6 17. Kh2 Rac8 18. Rac1 Nh5 19. Be5 f6 20. Bg3 Nb6 21. Bf5 Rce8 22. Rfe1 Nc4 23. Qc2 g6 24. Bd3 Kg7 25. Kg1 a6 26. Bh2 Nd6 27. Kg2 Qd7 28. Qb3 Nf7 29. h4 Nd8 30. c4 Ne6 31. Rxe6 Rxe6 32. cxd5 Rd6 33. Qb4 Rd8 34. Qxd6 Qxd6 35. Bxd6 Rxd6 36. Rc7+ Kh6 37. Bc4 b5 38. Rc6 Rd8 39. Bb3 a5 40. Rc5 a4 41. Bc2 Nf4+ 42. Kg3 Ne2+ 43. Kg2 Nxd4 44. Bd3 b4 45. Rc4 Rxd5 46. Rxb4 Nc6 47. Rb6 Rxd3 48. Rxc6 f5 49. Rc7 Rd2 50. Ra7 Rxa2 51. Kg3 Ra1 52. Kg2 a3 53. Kg3 a2 54. Kg2 g5 55. hxg5+ Kxg5 56. Ra4 h5 57. Kh2 h4 58. Kg2 h3+ 59. Kh2 Kf6 60. Ra5 Ke6 61. Ra6+ Kd5 62. Ra5+ Kd4 63. Ra3 Kc4 64. f4 Kd4 65. f3 Kc4 66. Ra8 Kd3 67. Ra3+ Ke2 68. Kxh3 Rh1+ 69. Kg2 a1Q 0-1

[Event "NED-chT 2122"]
[Site "Netherlands"]
[Date "2022.03.12"]
[Round "7.3"]
[White "L'Ami, Erwin"]
[Black "Van der Werf, Mark"]
[Result "1/2-1/2"]
[ECO "A61"]
[WhiteElo "2625"]
[BlackElo "2393"]
[PlyCount "99"]
[EventDate "2021.09.18"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]
[WhiteTeam "Apeldoorn Amevo"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. h3 Bg7 8. Bf4 0-0 9. e3 Ne8 10. Be2 Nd7 11. 0-0 Ne5 12. Nd2 Nc7 13. Bg3 f5 14. Re1 Bd7 15. a4 Qf6 16. Qb3 Rab8 17. Nb5 Bxb5 18. axb5 a6 19. b6 Ne8 20. f4 Nf7 21. Nc4 Qe7 22. Bf3 Nf6 23. Bh4 g5 24. fxg5 Ne4 25. g6 Qxh4 26. gxf7+ Rxf7 27. Bxe4 fxe4 28. Rf1 Rxf1+ 29. Rxf1 Rf8 30. Rxf8+ Kxf8 31. Qd1 Qg5 32. b3 h5 33. Qd2 Ke7 34. Kf1 Be5 35. Qc2 Qf5+ 36. Qf2 Qg5 37. Nd2 Bg3 38. Nxe4 Bxf2 39. Nxg5 Bxe3 40. Ne4 c4 41. bxc4 h4 42. Ke2 Bxb6 43. g4 hxg3 44. Nxg3 Kf6 45. Kd3 Ke5 46. Ne2 Bf2 47. Nc3 Be1 48. Ne2 Bf2 49. Nc3 Be1 50. Ne2 1/2-1/2

[Event "NED-chT 2122"]
[Site "Netherlands"]
[Date "2022.02.05"]
[Round "6.10"]
[White "Margarido, Jose Miguel Teixeir"]
[Black "Van der Werf, Mark"]
[Result "1/2-1/2"]
[ECO "C47"]
[WhiteElo "2143"]
[BlackElo "2393"]
[PlyCount "90"]
[EventDate "2021.09.18"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]
[WhiteTeam "Den Bosch HMC"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 5. Nxd4 Bb4 6. Nxc6 bxc6 7. Bd3 0-0 8. 0-0 d5 9. exd5 cxd5 10. h3 Re8 11. Qf3 c6 12. Bf4 Bxc3 13. bxc3 Ne4 14. c4 Qf6 15. cxd5 cxd5 16. Kh2 Bb7 17. Be3 Qxf3 18. gxf3 Nd6 19. Rfe1 Bc6 20. Bc5 Rxe1 21. Rxe1 Nc4 22. Re7 a6 23. Ra7 Rxa7 24. Bxa7 Bb5 25. Bxc4 Bxc4 26. a3 f6 27. Kg3 Kf7 28. f4 Ke6 29. h4 Be2 30. Bc5 Kf5 31. f3 h5 32. c3 Bd3 33. Be3 Bc2 34. Bc5 Bd1 35. Bf8 g6 36. Bc5 Ke6 37. Kf2 Kd7 38. Bd4 f5 39. Ke3 Kc6 40. Bf6 Kc5 41. Kd3 Bxf3 42. Be7+ Kb5 43. Kd4 Ka4 44. c4 dxc4 45. Kxc4 Bg4 1/2-1/2

[Event "Titled Tuesday intern op 18th Jan"]
[Site "Chess.com INT"]
[Date "2022.01.18"]
[Round "8"]
[White "Aloma Vidal, Roberto"]
[Black "Van der Werf, Mark"]
[Result "1-0"]
[ECO "B07"]
[WhiteElo "2437"]
[BlackElo "2389"]
[PlyCount "105"]
[EventDate "2022.01.18"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 206 Extra"]
[Source "ChessBase"]
[SourceDate "2022.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.03.31"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. h4 h5 5. Nf3 Bg4 6. Be2 Nc6 7. d5 Bxf3 8. Bxf3 Ne5 9. Be2 Bg7 10. Bg5 c6 11. 0-0 0-0 12. g3 Qb6 13. Rb1 a5 14. Kg2 a4 15. a3 Qa5 16. f3 Rac8 17. Qd4 cxd5 18. exd5 Ra8 19. Rfd1 Rfc8 20. Qb4 Qxb4 21. axb4 a3 22. Bd2 axb2 23. Rxb2 Nc4 24. Bxc4 Rxc4 25. Rb3 Rac8 26. Be1 Nd7 27. Rd3 Ne5 28. Re3 Kf8 29. Kh3 Nd7 30. f4 Nf6 31. Rd3 Ng4 32. Kg2 Ra8 33. Kf3 Ra1 34. Ke2 Nh6 35. Bd2 Nf5 36. b5 Rg1 37. Kf2 Rh1 38. Kg2 Ra1 39. b6 Bd4 40. Ne2 Bc5 41. c3 Ra2 42. Kf3 Ra6 43. Rb1 Rxb6 44. Rxb6 Bxb6 45. Be1 Bc5 46. Rd1 Ra4 47. Rb1 b6 48. Bd2 Ra2 49. Be1 Rc2 50. Ra1 Kg7 51. Rb1 Ne3 52. Ke4 f5+ 53. Kd3 1-0

[Event "Titled Tuesday intern op 18th Jan"]
[Site "Chess.com INT"]
[Date "2022.01.18"]
[Round "6"]
[White "Artemenko, Oleg"]
[Black "Van der Werf, Mark"]
[Result "1-0"]
[ECO "B08"]
[WhiteElo "2246"]
[BlackElo "2389"]
[PlyCount "43"]
[EventDate "2022.01.18"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 206 Extra"]
[Source "ChessBase"]
[SourceDate "2022.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.03.31"]
[SourceQuality "1"]

1. d4 d6 2. Nc3 Nf6 3. e4 g6 4. Nf3 Bg7 5. Be2 0-0 6. 0-0 c5 7. dxc5 dxc5 8. h3 Nc6 9. Be3 Qxd1 10. Raxd1 b6 11. e5 Nd7 12. e6 fxe6 13. Nb5 Nf6 14. Nc7 Rb8 15. Bc4 Nd8 16. Ng5 Kh8 17. Rxd8 Rxd8 18. Nf7+ Kg8 19. Nxd8 Bd7 20. Ncxe6 Bxe6 21. Nxe6 Bh6 22. Bxh6 1-0

[Event "Titled Tuesday intern op 18th Jan"]
[Site "Chess.com INT"]
[Date "2022.01.18"]
[Round "2"]
[White "Ivanov, Oleg"]
[Black "Van der Werf, Mark"]
[Result "1-0"]
[ECO "A30"]
[WhiteElo "2458"]
[BlackElo "2389"]
[PlyCount "89"]
[EventDate "2022.01.18"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 206 Extra"]
[Source "ChessBase"]
[SourceDate "2022.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.03.31"]
[SourceQuality "1"]

1. c4 e6 2. Nf3 Nf6 3. g3 b6 4. Bg2 Bb7 5. 0-0 c5 6. b3 Be7 7. Bb2 0-0 8. d4 cxd4 9. Qxd4 d6 10. Nc3 Nbd7 11. Rfd1 a6 12. Rac1 Qc7 13. e4 Nc5 14. e5 dxe5 15. Qxe5 Qxe5 16. Nxe5 Bxg2 17. Kxg2 Rfc8 18. b4 Nce4 19. Nxe4 Nxe4 20. Nd7 Bd8 21. f3 Nf6 22. Nxf6+ Bxf6 23. Bxf6 gxf6 24. Rd6 Rab8 25. Kf2 Kf8 26. Ke3 Ke7 27. Rd4 a5 28. a3 axb4 29. axb4 Ra8 30. c5 Ra3+ 31. Rd3 Rxd3+ 32. Kxd3 bxc5 33. Rxc5 Rd8+ 34. Kc3 Kd6 35. Rh5 Rh8 36. b5 Kc7 37. Kb4 Kb6 38. g4 e5 39. Rf5 Rf8 40. Rxf6+ Kb7 41. h4 h5 42. gxh5 Rh8 43. Rxf7+ Kb6 44. Rf6+ Kb7 45. h6 1-0

[Event "Titled Tuesday intern op 18th Jan"]
[Site "Chess.com INT"]
[Date "2022.01.18"]
[Round "10"]
[White "Osmonbekov, Talaibek D"]
[Black "Van der Werf, Mark"]
[Result "0-1"]
[ECO "A43"]
[WhiteElo "2136"]
[BlackElo "2389"]
[PlyCount "62"]
[EventDate "2022.01.18"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 206 Extra"]
[Source "ChessBase"]
[SourceDate "2022.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.03.31"]
[SourceQuality "1"]

1. d4 Nf6 2. Nc3 c5 3. d5 d6 4. e4 g6 5. f4 Bg7 6. h3 0-0 7. Nf3 e6 8. Be2 exd5 9. exd5 Re8 10. 0-0 Na6 11. Nd2 Nc7 12. a4 Ncxd5 13. Nxd5 Nxd5 14. Nc4 Nb4 15. c3 Nc6 16. Bg4 d5 17. Ne3 d4 18. Nc4 Bxg4 19. Qxg4 dxc3 20. Rd1 Bd4+ 21. Kh1 cxb2 22. Bxb2 Qf6 23. Bxd4 Nxd4 24. Rab1 b6 25. Ne5 Rad8 26. a5 Nf5 27. Rxd8 Rxd8 28. axb6 axb6 29. Kh2 h5 30. Qf3 Nd4 31. Qb7 Qxf4+ 0-1

[Event "Titled Tuesday intern op 18th Jan"]
[Site "Chess.com INT"]
[Date "2022.01.18"]
[Round "11"]
[White "Prieto Aranguren, Alain"]
[Black "Van der Werf, Mark"]
[Result "1-0"]
[ECO "B23"]
[WhiteElo "2256"]
[BlackElo "2389"]
[PlyCount "61"]
[EventDate "2022.01.18"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 206 Extra"]
[Source "ChessBase"]
[SourceDate "2022.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.03.31"]
[SourceQuality "1"]

1. e4 d6 2. f4 g6 3. Bc4 Bg7 4. Nf3 c5 5. 0-0 Nc6 6. d3 e6 7. Nc3 Nge7 8. f5 d5 9. Bb3 Nd4 10. Nxd4 Bxd4+ 11. Kh1 Bxc3 12. bxc3 exf5 13. Qe1 c4 14. Ba4+ Bd7 15. Bxd7+ Qxd7 16. exd5 0-0 17. dxc4 Rfe8 18. Qh4 Nc8 19. Bh6 Qd8 20. Qd4 f6 21. Rae1 Nd6 22. Rxe8+ Nxe8 23. c5 Nc7 24. d6 Ne6 25. Qd5 Qd7 26. Rb1 Rb8 27. c6 Qf7 28. c7 Nxc7 29. Qxf7+ Kxf7 30. dxc7 Re8 31. h3 1-0

[Event "Titled Tuesday intern op 18th Jan"]
[Site "Chess.com INT"]
[Date "2022.01.18"]
[Round "4"]
[White "Van der Werf, Mark"]
[Black "Arabidze, Meri"]
[Result "1-0"]
[ECO "D35"]
[WhiteElo "2389"]
[BlackElo "2432"]
[PlyCount "87"]
[EventDate "2022.01.18"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 206 Extra"]
[Source "ChessBase"]
[SourceDate "2022.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.03.31"]
[SourceQuality "1"]

1. c4 e6 2. Nc3 d5 3. d4 Nf6 4. Nf3 Nbd7 5. cxd5 exd5 6. Bf4 c6 7. h3 Be7 8. e3 Nf8 9. Bd3 Ng6 10. Bh2 0-0 11. 0-0 Bd6 12. Ne5 Qe7 13. f4 Re8 14. Qf3 Bd7 15. Rae1 b5 16. g4 b4 17. Ne2 c5 18. Ng3 Rac8 19. g5 Ne4 20. Nxe4 dxe4 21. Bxe4 Bb5 22. Rf2 c4 23. Bd5 Rf8 24. Nxg6 hxg6 25. h4 c3 26. bxc3 bxc3 27. h5 Bc4 28. Bxc4 Rxc4 29. hxg6 fxg6 30. Qd5+ Qf7 31. Qxd6 c2 32. Rc1 Qf5 33. Bg3 Rfc8 34. Qe5 Qg4 35. Qd5+ Kf8 36. Qf3 Qf5 37. e4 Qd7 38. f5 Rc3 39. Qf4 Kg8 40. fxg6 Rxg3+ 41. Qxg3 Qxd4 42. Qh4 Qd1+ 43. Kg2 Qxc1 44. Qh7# 1-0

[Event "Titled Tuesday intern op 18th Jan"]
[Site "Chess.com INT"]
[Date "2022.01.18"]
[Round "3"]
[White "Van der Werf, Mark"]
[Black "Broca Jimenez, Fernando"]
[Result "1-0"]
[ECO "A16"]
[WhiteElo "2389"]
[BlackElo "2075"]
[PlyCount "27"]
[EventDate "2022.01.18"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 206 Extra"]
[Source "ChessBase"]
[SourceDate "2022.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.03.31"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 c6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. bxc3 exf6 7. d4 Be7 8. Bd3 Nd7 9. Ne2 0-0 10. 0-0 c5 11. Ng3 Nb6 12. Qh5 g6 13. Qh6 cxd4 14. Nh5 1-0

[Event "Titled Tuesday intern op 18th Jan"]
[Site "Chess.com INT"]
[Date "2022.01.18"]
[Round "9"]
[White "Van der Werf, Mark"]
[Black "Havanecz, Bianka"]
[Result "0-1"]
[ECO "D46"]
[WhiteElo "2389"]
[BlackElo "2249"]
[PlyCount "76"]
[EventDate "2022.01.18"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 206 Extra"]
[Source "ChessBase"]
[SourceDate "2022.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.03.31"]
[SourceQuality "1"]

1. c4 c6 2. Nf3 d5 3. e3 Nf6 4. Nc3 e6 5. b3 Be7 6. Bb2 0-0 7. Qc2 Nbd7 8. d4 b6 9. Bd3 Bb7 10. 0-0 Rc8 11. Ne5 c5 12. Rad1 cxd4 13. exd4 Re8 14. f4 Nf8 15. Kh1 dxc4 16. bxc4 g6 17. Qf2 Qc7 18. Qg3 Red8 19. f5 exf5 20. Bxf5 Nh5 21. Qh3 Ra8 22. Be4 Bxe4 23. Nxe4 f5 24. Nc3 Bf6 25. Nd5 Qg7 26. Nxf6+ Qxf6 27. d5 Re8 28. Nd3 Qg5 29. Qf3 Re3 30. Qf2 Rae8 31. Bc1 f4 32. Bxe3 Rxe3 33. Nb4 Nd7 34. Nc6 Qg4 35. Nd4 Ne5 36. Ne6 Re2 37. Qg1 Ng3+ 38. hxg3 f3 0-1

[Event "Titled Tuesday intern op 18th Jan"]
[Site "Chess.com INT"]
[Date "2022.01.18"]
[Round "1"]
[White "Van der Werf, Mark"]
[Black "Krivonosov, Oleg"]
[Result "1/2-1/2"]
[ECO "D35"]
[WhiteElo "2389"]
[BlackElo "2362"]
[PlyCount "124"]
[EventDate "2022.01.18"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 206 Extra"]
[Source "ChessBase"]
[SourceDate "2022.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.03.31"]
[SourceQuality "1"]

1. c4 e6 2. Nc3 d5 3. d4 Be7 4. cxd5 exd5 5. Bf4 Nf6 6. e3 0-0 7. Bd3 c5 8. dxc5 Bxc5 9. Nge2 Nc6 10. 0-0 d4 11. exd4 Nxd4 12. Nxd4 Qxd4 13. Be3 Qe5 14. Bxc5 Qxc5 15. Ne4 Nxe4 16. Bxe4 Be6 17. Bxb7 Rab8 18. Bf3 Rxb2 19. Qc1 Qxc1 20. Rfxc1 Rfb8 21. a4 a5 22. h3 g6 23. Rc5 Rd8 24. Rxa5 Rdd2 25. Rb5 Rxb5 26. axb5 Rb2 27. Bc6 Bc4 28. Ra8+ Kg7 29. Rb8 Rb3 30. b6 Kf6 31. b7 Ba6 32. Ra8 Bxb7 33. Rb8 Bxc6 34. Rxb3 Bd5 35. Rb6+ Kg7 36. f4 h5 37. h4 Be4 38. Kf2 Bd5 39. g3 Be4 40. Ke3 Bd5 41. Kd4 Ba2 42. Ke5 Bc4 43. f5 gxf5 44. Kxf5 Be2 45. Kg5 Bg4 46. Rh6 Be2 47. Rf6 Bd1 48. Rf4 Be2 49. Re4 Bd1 50. Kf4 Bg4 51. Re5 Bd1 52. Rg5+ Kf6 53. Rd5 Be2 54. Rd8 Bg4 55. Rg8 Be2 56. Rg5 Bd1 57. Rd5 Be2 58. Rd6+ Kg7 59. Ke5 Bg4 60. Rd4 Bf3 61. Rf4 Bd1 62. Rf2 Bg4 1/2-1/2

[Event "Titled Tuesday intern op 18th Jan"]
[Site "Chess.com INT"]
[Date "2022.01.18"]
[Round "7"]
[White "Van der Werf, Mark"]
[Black "Martinez Ramirez, Lennis"]
[Result "1-0"]
[ECO "A28"]
[WhiteElo "2389"]
[BlackElo "2456"]
[PlyCount "115"]
[EventDate "2022.01.18"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 206 Extra"]
[Source "ChessBase"]
[SourceDate "2022.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.03.31"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e3 Bb4 5. Qc2 Bxc3 6. Qxc3 Qe7 7. a3 0-0 8. d4 exd4 9. Nxd4 Nxd4 10. Qxd4 b6 11. Be2 Bb7 12. 0-0 Qe4 13. Qxe4 Bxe4 14. Bd2 a5 15. Bc3 d6 16. b4 axb4 17. axb4 Nd7 18. Rxa8 Rxa8 19. Ra1 Rxa1+ 20. Bxa1 f6 21. f3 Bb7 22. e4 Kf7 23. Kf2 Ke6 24. Ke3 c5 25. b5 Ne5 26. f4 Nf7 27. Bg4+ Ke7 28. h4 Kd8 29. h5 Bc8 30. Bxc8 Kxc8 31. g4 Kd7 32. Bb2 Ke6 33. Bc3 g5 34. hxg6 hxg6 35. Kf3 g5 36. f5+ Ke7 37. Ke3 Nh6 38. Kf3 Kf7 39. Bb2 Ng8 40. Bc3 Ne7 41. Ke3 Nc8 42. Kf3 Ke7 43. Ke3 Kf7 44. Kf3 d5 45. cxd5 Nd6 46. e5 fxe5 47. Bxe5 Nxb5 48. Ke4 c4 49. d6 c3 50. Kd3 Ke8 51. f6 Na7 52. Bxc3 Nc6 53. Bd2 Ne5+ 54. Ke4 Nxg4 55. Bxg5 b5 56. Kd5 b4 57. f7+ Kxf7 58. d7 1-0

[Event "Titled Tuesday intern op 18th Jan"]
[Site "Chess.com INT"]
[Date "2022.01.18"]
[Round "5"]
[White "Vovk, Orest"]
[Black "Van der Werf, Mark"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2315"]
[BlackElo "2389"]
[PlyCount "33"]
[EventDate "2022.01.18"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 206 Extra"]
[Source "ChessBase"]
[SourceDate "2022.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.03.31"]
[SourceQuality "1"]

1. h4 e5 2. h5 h6 3. Nc3 Nf6 4. d4 exd4 5. Qxd4 Nc6 6. Qa4 Bc5 7. g4 d6 8. g5 hxg5 9. Bxg5 Bd7 10. Qh4 Nd4 11. 0-0-0 Nf5 12. Qf4 Rxh5 13. Bxf6 Qxf6 14. Rxh5 0-0-0 15. Bh3 g6 16. Bxf5 Bxf5 17. Rxf5 1-0

[Event "Titled Tuesday intern op 11th Jan"]
[Site "Chess.com INT"]
[Date "2022.01.11"]
[Round "7"]
[White "Curtis, John"]
[Black "Van der Werf, Mark"]
[Result "1-0"]
[ECO "C68"]
[WhiteElo "2292"]
[BlackElo "2389"]
[PlyCount "97"]
[EventDate "2022.01.11"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 206 Extra"]
[Source "ChessBase"]
[SourceDate "2022.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.03.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. 0-0 Be7 6. Nxe5 Qd4 7. Nf3 Qxe4 8. Re1 Qg6 9. d3 Be6 10. Ne5 Qf5 11. Qf3 Qxf3 12. Nxf3 0-0-0 13. Ng5 Bxg5 14. Bxg5 Re8 15. Nd2 h6 16. Bh4 g5 17. Bg3 f5 18. Be5 Rh7 19. b3 Rhe7 20. Bb2 c5 21. Re3 f4 22. Re2 Bf5 23. Rxe7 Rxe7 24. Kf1 b5 25. Re1 Kd7 26. Rxe7+ Nxe7 27. Bg7 Ng8 28. Ke2 Ke6 29. h3 Kf7 30. Be5 c6 31. Bd6 Nf6 32. Bxc5 Nd5 33. Nb1 h5 34. f3 Ke6 35. c4 Nf6 36. Nc3 Nd7 37. Ba7 bxc4 38. bxc4 Ne5 39. Ne4 g4 40. hxg4 hxg4 41. Bb8 Bxe4 42. dxe4 gxf3+ 43. gxf3 Nxc4 44. Bxf4 c5 45. Bc1 Ke5 46. Bh6 Kd4 47. Bg7+ Ne5 48. f4 Kxe4 49. Bxe5 1-0

[Event "Titled Tuesday intern op 11th Jan"]
[Site "Chess.com INT"]
[Date "2022.01.11"]
[Round "6"]
[White "Hernandez Jimenez, Alexander Andres"]
[Black "Van der Werf, Mark"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "2167"]
[BlackElo "2389"]
[PlyCount "89"]
[EventDate "2022.01.11"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 206 Extra"]
[Source "ChessBase"]
[SourceDate "2022.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.03.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. c3 d6 6. Nbd2 a5 7. Bb5 0-0 8. Nf1 Ne7 9. Be3 Ng6 10. Bxc5 dxc5 11. Ng3 c6 12. Ba4 b5 13. Bc2 a4 14. d4 cxd4 15. cxd4 exd4 16. Qxd4 Qxd4 17. Nxd4 Bd7 18. 0-0 c5 19. Ndf5 Bxf5 20. Nxf5 Nf4 21. Rfd1 g6 22. Ne7+ Kg7 23. Nc6 Rfc8 24. g3 Ne2+ 25. Kf1 Rxc6 26. Kxe2 Re8 27. Kf3 Rce6 28. Re1 Nd7 29. Rad1 Ne5+ 30. Kg2 Nc6 31. Rd5 c4 32. Rxb5 Nd4 33. Bxa4 Nxb5 34. Bxb5 Rxe4 35. Rc1 Rb8 36. a4 Re2 37. b3 cxb3 38. Bxe2 b2 39. Rb1 Rb4 40. Bb5 Kf6 41. Kf3 Ke5 42. Ke3 Kd5 43. Kd3 f5 44. Kc3 Re4 45. Rxb2 1-0

[Event "Titled Tuesday intern op 11th Jan"]
[Site "Chess.com INT"]
[Date "2022.01.11"]
[Round "11"]
[White "Kiseljova, Marya"]
[Black "Van der Werf, Mark"]
[Result "0-1"]
[ECO "E60"]
[WhiteElo "2031"]
[BlackElo "2389"]
[PlyCount "116"]
[EventDate "2022.01.11"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 206 Extra"]
[Source "ChessBase"]
[SourceDate "2022.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.03.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 g6 4. Nf3 Bg7 5. g3 b5 6. cxb5 a6 7. b6 d6 8. Bg2 Nbd7 9. 0-0 Nxb6 10. Nc3 0-0 11. Nd2 Bb7 12. e4 a5 13. f4 Ba6 14. Rf2 a4 15. b3 Nfd7 16. Bb2 a3 17. Bxa3 Bxc3 18. Rc1 Bd4 19. e5 Bb7 20. Nb1 Bxd5 21. exd6 exd6 22. Kf1 Bxf2 23. Kxf2 Nf6 24. h3 Bxg2 25. Kxg2 Rxa3 26. Nxa3 Qa8+ 27. Qf3 Qxa3 28. Rc2 Qb4 29. f5 Qe4 30. Rd2 Qxf3+ 31. Kxf3 d5 32. Rc2 c4 33. bxc4 dxc4 34. a4 Ra8 35. fxg6 hxg6 36. Rb2 Nfd5 37. a5 Rxa5 38. Ke4 c3 39. Rc2 Rb5 40. h4 Rb2 41. Rc1 c2 42. g4 Nb4 43. Kd4 Rb1 44. Rxc2 Nxc2+ 45. Kc3 Rg1 46. h5 Rxg4 47. hxg6 fxg6 48. Kxc2 Rg3 49. Kd2 Kf7 50. Ke2 Kf6 51. Kf2 Ra3 52. Kg2 Kf5 53. Kf2 Ke4 54. Kg2 Rf3 55. Kh2 Ke3 56. Kg2 Nd5 57. Kh2 Kf2 58. Kh1 Rh3# 0-1

[Event "Titled Tuesday intern op 11th Jan"]
[Site "Chess.com INT"]
[Date "2022.01.11"]
[Round "9"]
[White "Medeiros, Francisco de Assis"]
[Black "Van der Werf, Mark"]
[Result "0-1"]
[ECO "A46"]
[WhiteElo "2074"]
[BlackElo "2389"]
[PlyCount "52"]
[EventDate "2022.01.11"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 206 Extra"]
[Source "ChessBase"]
[SourceDate "2022.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.03.31"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. Bg5 h6 4. Bh4 d6 5. Nbd2 g5 6. Bg3 Nh5 7. e4 Bg7 8. c3 Nd7 9. Bd3 a6 10. Qe2 Qe7 11. 0-0 Nxg3 12. fxg3 b6 13. Rae1 Bb7 14. g4 h5 15. gxh5 g4 16. e5 gxf3 17. Nxf3 dxe5 18. dxe5 Nc5 19. Bc2 0-0-0 20. b4 Nd7 21. a3 Rxh5 22. Bd3 Nxe5 23. Nxe5 Rxe5 24. Qg4 Rxe1 25. Rxe1 Bxc3 26. Rd1 Bd4+ 0-1

[Event "Titled Tuesday intern op 11th Jan"]
[Site "Chess.com INT"]
[Date "2022.01.11"]
[Round "4"]
[White "Sahil, Tickoo"]
[Black "Van der Werf, Mark"]
[Result "1-0"]
[ECO "D00"]
[WhiteElo "2201"]
[BlackElo "2389"]
[PlyCount "95"]
[EventDate "2022.01.11"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 206 Extra"]
[Source "ChessBase"]
[SourceDate "2022.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.03.31"]
[SourceQuality "1"]

1. d4 Nf6 2. Bf4 c5 3. e3 d5 4. c3 Nc6 5. Nd2 Bf5 6. Ngf3 e6 7. Nh4 Bg4 8. Qb3 Qb6 9. h3 Bh5 10. g4 Bg6 11. Nxg6 hxg6 12. Bg2 c4 13. Qc2 Qa5 14. 0-0 b5 15. a3 Qd8 16. e4 Be7 17. Rfe1 0-0 18. Bg3 a5 19. e5 Nd7 20. f4 Nb6 21. f5 gxf5 22. gxf5 exf5 23. Qxf5 Bh4 24. Re3 Bg5 25. Bf4 Bxf4 26. Qxf4 Qd7 27. Rg3 Nd8 28. Kh2 Ne6 29. Qh6 b4 30. Rg1 f5 31. exf6 Rxf6 32. Qxf6 Rf8 33. Qg6 bxc3 34. bxc3 Qd6 35. Rf1 Nd7 36. Rxf8+ Ndxf8 37. Qg4 Nh7 38. Nf3 Nf6 39. Qf5 Ne4 40. Ne5 Nxg3 41. Qf7+ Kh7 42. Qg6+ Kg8 43. Qxg3 Qxa3 44. Qg6 Qd6 45. Qf7+ Kh7 46. Qg6+ Kg8 47. Bf3 Qf8 48. Qxe6+ 1-0

[Event "Titled Tuesday intern op 11th Jan"]
[Site "Chess.com INT"]
[Date "2022.01.11"]
[Round "10"]
[White "Van der Werf, Mark"]
[Black "Andersson, Bjorn2222"]
[Result "0-1"]
[ECO "B38"]
[WhiteElo "2389"]
[BlackElo "2131"]
[PlyCount "94"]
[EventDate "2022.01.11"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 206 Extra"]
[Source "ChessBase"]
[SourceDate "2022.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.03.31"]
[SourceQuality "1"]

1. c4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. e4 Bg7 6. Be3 Qb6 7. Nb3 Qc7 8. Nc3 Bxc3+ 9. bxc3 Nf6 10. f3 Ne5 11. c5 d6 12. cxd6 exd6 13. Bh6 Qxc3+ 14. Qd2 Qxd2+ 15. Kxd2 Nfd7 16. Be2 f6 17. Nd4 Ke7 18. Rac1 Nc5 19. Nb5 Be6 20. Nc7 Rac8 21. Nxe6 Nxe6 22. Be3 b6 23. f4 Nd7 24. Bf3 Ndc5 25. h4 Rhd8 26. g4 Ng7 27. f5 Ne8 28. fxg6 hxg6 29. h5 gxh5 30. gxh5 Ng7 31. h6 Nge6 32. h7 Rh8 33. Rcg1 Nd7 34. Bg4 Ne5 35. Bxe6 Kxe6 36. Rg7 Nf7 37. Bd4 Rc4 38. Kd3 Ra4 39. Rh6 Ra3+ 40. Bc3 Ne5+ 41. Kc2 Rc8 42. h8Q Raxc3+ 43. Kd2 Rc2+ 44. Kd1 Rc1+ 45. Kd2 R8c2+ 46. Ke3 Re1+ 47. Kd4 Rc4# 0-1

[Event "Titled Tuesday intern op 11th Jan"]
[Site "Chess.com INT"]
[Date "2022.01.11"]
[Round "2"]
[White "Van der Werf, Mark"]
[Black "Baker, Chris W"]
[Result "1-0"]
[ECO "E41"]
[WhiteElo "2389"]
[BlackElo "2227"]
[PlyCount "91"]
[EventDate "2022.01.11"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 206 Extra"]
[Source "ChessBase"]
[SourceDate "2022.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.03.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 d5 6. cxd5 cxd4 7. exd4 exd5 8. Nge2 0-0 9. 0-0 Nc6 10. Bg5 Be7 11. Rc1 h6 12. Bh4 Be6 13. a3 Rc8 14. Bb1 Qd7 15. Nf4 Bf5 16. Bxf6 Bxf6 17. Ncxd5 Bg5 18. h4 Bxf4 19. Nxf4 Bxb1 20. Rxb1 Qxd4 21. Qxd4 Nxd4 22. Rbd1 Rfd8 23. g3 Rc2 24. b4 Ne2+ 25. Nxe2 Rxd1 26. Rxd1 Rxe2 27. Rd8+ Kh7 28. Rd7 b5 29. Rxf7 a6 30. Ra7 Re6 31. h5 Kg8 32. Kg2 Rf6 33. g4 Kf8 34. Kg3 Rd6 35. f3 Kg8 36. Kf4 Re6 37. Kf5 Rf6+ 38. Ke4 Re6+ 39. Kd5 Rf6 40. Kc5 Rxf3 41. Rxa6 Rg3 42. Kxb5 Rxg4 43. Rc6 Rg5+ 44. Rc5 g6 45. Rxg5 hxg5 46. hxg6 1-0

[Event "Titled Tuesday intern op 11th Jan"]
[Site "Chess.com INT"]
[Date "2022.01.11"]
[Round "3"]
[White "Van der Werf, Mark"]
[Black "Korchmar, Vasiliy"]
[Result "0-1"]
[ECO "E91"]
[WhiteElo "2389"]
[BlackElo "2450"]
[PlyCount "84"]
[EventDate "2022.01.11"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 206 Extra"]
[Source "ChessBase"]
[SourceDate "2022.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.03.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 g6 4. Nc3 Bg7 5. e4 d6 6. Nf3 0-0 7. Be2 e6 8. 0-0 exd5 9. exd5 Bg4 10. h3 Bxf3 11. Bxf3 Nbd7 12. Bf4 Ne8 13. Be2 f5 14. Qd2 Ne5 15. Rfe1 Nf7 16. Be3 g5 17. f4 h6 18. Rf1 Qf6 19. Rae1 Qg6 20. Bd3 g4 21. hxg4 Qxg4 22. Bf2 Nf6 23. Re6 Qh5 24. Be2 Ng4 25. Bxg4 fxg4 26. Ne2 Qf5 27. Ng3 Qh7 28. f5 Be5 29. f6 Ng5 30. Rxe5 dxe5 31. Nh5 Qg6 32. Ng7 Rxf6 33. Ne6 Nxe6 34. dxe6 Rxe6 35. Bxc5 g3 36. Qd5 Rae8 37. Qf3 e4 38. Qe3 Re5 39. Bd4 Rh5 40. Bc3 Rh1+ 41. Kxh1 Qh5+ 42. Kg1 Qh2# 0-1

[Event "Titled Tuesday intern op 11th Jan"]
[Site "Chess.com INT"]
[Date "2022.01.11"]
[Round "8"]
[White "Van der Werf, Mark"]
[Black "Osmonbekov, Talaibek D"]
[Result "0-1"]
[ECO "A21"]
[WhiteElo "2389"]
[BlackElo "2136"]
[PlyCount "118"]
[EventDate "2022.01.11"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 206 Extra"]
[Source "ChessBase"]
[SourceDate "2022.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.03.31"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 d6 3. e3 f5 4. d4 e4 5. g4 c6 6. gxf5 Bxf5 7. Nge2 Bg4 8. Qb3 Qe7 9. Bg2 Nf6 10. Ng3 Bf3 11. Bxf3 exf3 12. Bd2 g6 13. 0-0-0 Bg7 14. e4 Nbd7 15. Qxb7 0-0 16. Qxc6 Rfc8 17. Nd5 Qf8 18. Nxf6+ Nxf6 19. Qa4 Kh8 20. Bc3 Ng4 21. Rhf1 Qf7 22. b3 h5 23. h3 Nxf2 24. Rxf2 Qf4+ 25. Kb2 Qxg3 26. Rdf1 Rf8 27. Qc6 Rae8 28. Rxf3 Qg2+ 29. Ka3 Rxf3 30. Qxe8+ Kh7 31. Rxf3 Qxf3 32. Bb2 Qxh3 33. Qe7 Qg2 34. d5 Qxb2+ 35. Ka4 Qxa2+ 36. Kb5 Qxb3+ 37. Kc6 Qb6+ 38. Kd7 Qb7+ 39. Kxd6 Qxe7+ 40. Kxe7 h4 41. d6 Be5 42. d7 Bc7 43. d8Q Bxd8+ 44. Kxd8 h3 45. e5 h2 46. e6 h1Q 47. e7 Qc6 48. e8Q Qa8+ 49. Ke7 Qxe8+ 50. Kxe8 g5 51. c5 g4 52. c6 g3 53. c7 g2 54. c8Q g1Q 55. Qd7+ Qg7 56. Qh3+ Qh6 57. Qd7+ Qg7 58. Qh3+ Kg8 59. Qe6+ Kh8 0-1

[Event "Titled Tuesday intern op 11th Jan"]
[Site "Chess.com INT"]
[Date "2022.01.11"]
[Round "5"]
[White "Van der Werf, Mark"]
[Black "Zaichenko, Daria"]
[Result "1-0"]
[ECO "D35"]
[WhiteElo "2389"]
[BlackElo "2104"]
[PlyCount "73"]
[EventDate "2022.01.11"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 206 Extra"]
[Source "ChessBase"]
[SourceDate "2022.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.03.31"]
[SourceQuality "1"]

1. c4 e6 2. Nc3 d5 3. d4 Be7 4. cxd5 exd5 5. Bf4 c6 6. e3 Nf6 7. Bd3 Bg4 8. Qc2 Nbd7 9. f3 Be6 10. Nge2 a6 11. Bg3 c5 12. Nf4 c4 13. Nxe6 fxe6 14. Be2 b5 15. a3 Qb6 16. 0-0 0-0 17. Rad1 a5 18. a4 b4 19. Nb5 Rac8 20. e4 Nb8 21. Bxb8 Rxb8 22. e5 Nh5 23. g3 g6 24. f4 Ng7 25. g4 h5 26. h3 hxg4 27. hxg4 Kh7 28. Kg2 b3 29. Rh1+ Kg8 30. Qxg6 Rxf4 31. Qh7+ Kf7 32. Rdf1 Bg5 33. Rxf4+ Bxf4 34. Rf1 c3 35. Rxf4+ Ke8 36. Qxg7 c2 37. Rf8# 1-0

[Event "Titled Tuesday intern op 11th Jan"]
[Site "Chess.com INT"]
[Date "2022.01.11"]
[Round "1"]
[White "Vokhidov, Shamsiddin"]
[Black "Van der Werf, Mark"]
[Result "1-0"]
[ECO "C48"]
[WhiteElo "2536"]
[BlackElo "2389"]
[PlyCount "105"]
[EventDate "2022.01.11"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 206 Extra"]
[Source "ChessBase"]
[SourceDate "2022.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.03.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bd6 5. a3 Nd4 6. Bc4 c6 7. d3 Bc7 8. Bg5 Ne6 9. Bh4 0-0 10. 0-0 Nf4 11. Bg3 Ng6 12. d4 d5 13. dxe5 Nxe4 14. Nxe4 dxe4 15. Qxd8 Bxd8 16. Nd4 Bb6 17. c3 Re8 18. e6 Bxe6 19. Nxe6 fxe6 20. Rfe1 e3 21. fxe3 Rac8 22. Rad1 Bc7 23. Rd7 Bxg3 24. hxg3 Ne5 25. Rd4 c5 26. Re4 Nxc4 27. Rxc4 Red8 28. Re2 b5 29. Rf4 Rd3 30. a4 a6 31. g4 Rcd8 32. Kf2 Rd2 33. axb5 axb5 34. Re4 Kf7 35. Re5 Rxe2+ 36. Kxe2 Rd5 37. Re4 Rg5 38. Kf3 Ke7 39. b4 Rd5 40. Ke2 c4 41. Rd4 Rxd4 42. exd4 Kd6 43. Ke3 g5 44. Ke4 h6 45. g3 Kd7 46. Ke5 Ke7 47. d5 exd5 48. Kxd5 Kf6 49. Kc5 Ke5 50. Kxb5 Ke4 51. Kxc4 Kf3 52. b5 Kxg3 53. b6 1-0

[Event "Titled Tuesday intern op 30th Nov"]
[Site "Chess.com INT"]
[Date "2021.11.30"]
[Round "6"]
[White "Findlay, Ian T"]
[Black "Van der Werf, Mark"]
[Result "1-0"]
[ECO "C67"]
[WhiteElo "2156"]
[BlackElo "2387"]
[PlyCount "37"]
[EventDate "2021.11.30"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. 0-0 Nxe4 5. d4 Nd6 6. dxe5 Nxb5 7. a4 d6 8. e6 Bxe6 9. axb5 Ne5 10. Nd4 Be7 11. f4 c5 12. Nxe6 fxe6 13. fxe5 d5 14. Qh5+ Kd7 15. Nc3 Qb6 16. Qg4 Raf8 17. Bg5 Qd8 18. Bxe7 Qxe7 19. Nxd5 1-0

[Event "Titled Tuesday intern op 30th Nov"]
[Site "Chess.com INT"]
[Date "2021.11.30"]
[Round "10"]
[White "Muromtsev, Arthur"]
[Black "Van der Werf, Mark"]
[Result "0-1"]
[ECO "C47"]
[WhiteElo "2095"]
[BlackElo "2387"]
[PlyCount "74"]
[EventDate "2021.11.30"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. g3 d5 4. exd5 Nxd5 5. Bg2 Nxc3 6. bxc3 Nc6 7. Nf3 Bc5 8. 0-0 0-0 9. d3 Bg4 10. Qe1 Bd6 11. Ng5 Qd7 12. Qe4 Bf5 13. Bh3 Bxe4 14. Bxd7 Bg6 15. Rb1 Nd8 16. f4 exf4 17. Bxf4 Bxf4 18. gxf4 h6 19. f5 Bxf5 20. Rxf5 hxg5 21. Rxg5 b6 22. h4 f6 23. Rg6 Kf7 24. h5 Rh8 25. Bg4 c5 26. Re1 Nc6 27. Bf3 Rac8 28. Bd5+ Kf8 29. Be6 Rc7 30. Bg4 Ne5 31. Rxe5 fxe5 32. Rg5 Re7 33. c4 Rh6 34. Rf5+ Rf6 35. Rg5 e4 36. Kg2 e3 37. Bf3 e2 0-1

[Event "Titled Tuesday intern op 30th Nov"]
[Site "Chess.com INT"]
[Date "2021.11.30"]
[Round "8"]
[White "Nastore, Pavel Alexandru"]
[Black "Van der Werf, Mark"]
[Result "1-0"]
[ECO "C87"]
[WhiteElo "2249"]
[BlackElo "2387"]
[PlyCount "99"]
[EventDate "2021.11.30"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. 0-0 d6 5. c3 Bd7 6. Re1 Be7 7. d4 0-0 8. h3 a6 9. Ba4 Re8 10. Nbd2 Bf8 11. Bc2 g6 12. Nf1 Bg7 13. d5 Ne7 14. g4 c6 15. c4 b5 16. b3 Bc8 17. Rb1 Qc7 18. Ng3 bxc4 19. bxc4 Nd7 20. Be3 cxd5 21. cxd5 Nc5 22. Qd2 Bd7 23. Bh6 Rec8 24. Rec1 Qd8 25. Nh4 Nxd5 26. Nhf5 gxf5 27. exd5 f4 28. Bxg7 Kxg7 29. Nh5+ Kh8 30. Rb2 Qg5 31. f3 Rg8 32. Kh2 Rab8 33. Rxb8 Rxb8 34. Rb1 Re8 35. Rb6 f5 36. Rxd6 fxg4 37. fxg4 e4 38. Qd4+ Qe5 39. Qxc5 f3+ 40. Ng3 e3 41. Rxd7 f2 42. Bd3 e2 43. Bxe2 Qxe2 44. Qd4+ Qe5 45. Qxe5+ Rxe5 46. Kg2 Re1 47. Kxf2 Ra1 48. Nf5 Rxa2+ 49. Kf3 Kg8 50. d6 1-0

[Event "Titled Tuesday intern op 30th Nov"]
[Site "Chess.com INT"]
[Date "2021.11.30"]
[Round "2"]
[White "Prithu, Gupta"]
[Black "Van der Werf, Mark"]
[Result "1-0"]
[ECO "E61"]
[WhiteElo "2444"]
[BlackElo "2387"]
[PlyCount "51"]
[EventDate "2021.11.30"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 c5 3. e3 g6 4. c4 Bg7 5. Nc3 0-0 6. d5 e6 7. Be2 exd5 8. cxd5 d6 9. 0-0 Na6 10. e4 Nc7 11. Nd2 b6 12. f4 Re8 13. a4 Na6 14. Bb5 Re7 15. e5 dxe5 16. Nc4 e4 17. d6 Rd7 18. f5 Bb7 19. Bg5 Nb4 20. fxg6 hxg6 21. Bxd7 Qxd7 22. Bxf6 Bh6 23. Qe1 Qg4 24. Ne3 Qh5 25. d7 Nd3 26. Qg3 1-0

[Event "Titled Tuesday intern op 30th Nov"]
[Site "Chess.com INT"]
[Date "2021.11.30"]
[Round "3"]
[White "Van der Werf, Mark"]
[Black "Begunov, Konstantin"]
[Result "1-0"]
[ECO "D15"]
[WhiteElo "2387"]
[BlackElo "2325"]
[PlyCount "71"]
[EventDate "2021.11.30"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. c4 c6 2. Nf3 d5 3. e3 Nf6 4. Nc3 a6 5. d4 Bg4 6. Qb3 b5 7. cxd5 Bxf3 8. gxf3 cxd5 9. a4 bxa4 10. Qxa4+ Nbd7 11. e4 e6 12. Bg5 Be7 13. Bxf6 Bxf6 14. exd5 exd5 15. Bh3 Ra7 16. Nxd5 0-0 17. Bxd7 Rxd7 18. Nxf6+ gxf6 19. 0-0-0 Rd5 20. Kb1 Qb6 21. Rhg1+ Kh8 22. Rg4 Rb8 23. Qc2 Rb5 24. Rd2 Rh5 25. h4 Qb4 26. d5 Qd6 27. Rgd4 Re5 28. Rd1 Rb6 29. Rg1 Re8 30. h5 Reb8 31. Rc4 Qa3 32. Rc8+ Qf8 33. Rxf8+ Rxf8 34. h6 Rd8 35. Rg7 Rbd6 36. Qxh7# 1-0

[Event "Titled Tuesday intern op 30th Nov"]
[Site "Chess.com INT"]
[Date "2021.11.30"]
[Round "7"]
[White "Van der Werf, Mark"]
[Black "Daianu, Cristian Clement"]
[Result "1-0"]
[ECO "A28"]
[WhiteElo "2387"]
[BlackElo "2171"]
[PlyCount "46"]
[EventDate "2021.11.30"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e3 d5 5. cxd5 Nxd5 6. Bb5 Be7 7. Nxe5 0-0 8. Nxc6 bxc6 9. Bxc6 Nxc3 10. dxc3 Qxd1+ 11. Kxd1 Rd8+ 12. Ke2 Ba6+ 13. Kf3 Rab8 14. a4 Rb6 15. Bb5 Rf6+ 16. Ke2 Bb7 17. f3 Rg6 18. g3 a6 19. Bc4 Rgd6 20. e4 Rb6 21. a5 Rf6 22. Bg5 Rc6 23. Bxe7 Re8 1-0

[Event "Titled Tuesday intern op 30th Nov"]
[Site "Chess.com INT"]
[Date "2021.11.30"]
[Round "9"]
[White "Van der Werf, Mark"]
[Black "Kostiukov, Alexandr"]
[Result "1-0"]
[ECO "A31"]
[WhiteElo "2387"]
[BlackElo "2271"]
[PlyCount "61"]
[EventDate "2021.11.30"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. c4 c5 2. Nf3 Nf6 3. Nc3 g6 4. e4 Bg7 5. d4 cxd4 6. Nxd4 0-0 7. Be2 e6 8. 0-0 d5 9. cxd5 exd5 10. e5 Ne4 11. f4 Nxc3 12. bxc3 Nc6 13. Be3 Qa5 14. Qd2 Nxd4 15. cxd4 Qxd2 16. Bxd2 Be6 17. Rab1 b6 18. Rfc1 Rfc8 19. Ba6 Rxc1+ 20. Rxc1 Bf8 21. Rc7 h5 22. Kf2 Ba3 23. Ke3 Kf8 24. Bc1 Be7 25. Bd2 Ke8 26. Bb7 Rb8 27. Bc6+ Kf8 28. Rxa7 b5 29. Ra8 Rxa8 30. Bxa8 b4 31. Bc6 1-0

[Event "Titled Tuesday intern op 30th Nov"]
[Site "Chess.com INT"]
[Date "2021.11.30"]
[Round "11"]
[White "Van der Werf, Mark"]
[Black "Ochedzan, Tymon"]
[Result "0-1"]
[ECO "A22"]
[WhiteElo "2387"]
[BlackElo "2349"]
[PlyCount "30"]
[EventDate "2021.11.30"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. Nf3 d5 4. cxd5 Nxd5 5. Nxe5 Bb4 6. Nd3 Ba5 7. Qa4+ Nc6 8. Qe4+ Nde7 9. b4 Bf5 10. Qh4 g5 11. Qxg5 Bxb4 12. Nf4 Nd4 13. Qf6 Rg8 14. Rb1 Bxc3 15. dxc3 Nc2# 0-1

[Event "Titled Tuesday intern op 30th Nov"]
[Site "Chess.com INT"]
[Date "2021.11.30"]
[Round "1"]
[White "Van der Werf, Mark"]
[Black "Xiong, Jeffery"]
[Result "0-1"]
[ECO "E59"]
[WhiteElo "2387"]
[BlackElo "2687"]
[PlyCount "70"]
[EventDate "2021.11.30"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Bd3 d5 6. a3 Bxc3+ 7. bxc3 dxc4 8. Bxc4 c5 9. Nf3 Nc6 10. 0-0 Qc7 11. Qc2 e5 12. h3 h6 13. Bb5 e4 14. Nd2 Bf5 15. f3 Rfe8 16. fxe4 Bxe4 17. Nxe4 Nxe4 18. Bd3 Nd6 19. Qf2 Na5 20. Rb1 Re6 21. e4 Nxe4 22. Bxe4 Rxe4 23. dxc5 Rae8 24. Bf4 Qd7 25. Bd6 Re2 26. Qg3 R8e3 27. Rf3 Qe6 28. Rbf1 Nc4 29. Qf4 Rxf3 30. Rxf3 Nd2 31. Rf2 g5 32. Rxe2 Qxe2 33. Qf5 Qe1+ 34. Kh2 Nf1+ 35. Kg1 Ne3+ 0-1

[Event "Titled Tuesday intern op 30th Nov"]
[Site "Chess.com INT"]
[Date "2021.11.30"]
[Round "5"]
[White "Van der Werf, Mark"]
[Black "Zherebtsova, Alexandra"]
[Result "1-0"]
[ECO "A21"]
[WhiteElo "2387"]
[BlackElo "2182"]
[PlyCount "121"]
[EventDate "2021.11.30"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 f5 3. d4 e4 4. f3 exf3 5. exf3 Nf6 6. Bd3 g6 7. Nge2 Bg7 8. 0-0 0-0 9. d5 a5 10. Bg5 h6 11. Bh4 Na6 12. Qd2 Nc5 13. Bc2 d6 14. Nd4 Bd7 15. Rae1 Re8 16. Rxe8+ Qxe8 17. Re1 Qf7 18. Ncb5 Bxb5 19. Nxb5 b6 20. b3 Re8 21. a3 Rxe1+ 22. Qxe1 Kh7 23. b4 axb4 24. axb4 Na6 25. Bf2 Nd7 26. Nd4 Ne5 27. Qc3 Bf6 28. Qa3 Nb8 29. Qb3 Nbd7 30. Ne6 Nf8 31. Nf4 Nfd7 32. g3 Qe7 33. Kg2 Nf8 34. Bd4 Nf7 35. Qc3 Bxd4 36. Qxd4 Qe5 37. Qxe5 dxe5 38. Nd3 Nd6 39. Nxe5 Kg7 40. c5 bxc5 41. bxc5 Nb7 42. d6 cxd6 43. c6 dxe5 44. cxb7 Nd7 45. Ba4 Nb8 46. g4 Kf6 47. gxf5 gxf5 48. Kg3 Ke7 49. Kh4 Kf6 50. Kh5 Kg7 51. Bb5 e4 52. fxe4 fxe4 53. Kg4 Kf6 54. Kf4 Ke6 55. Kxe4 Kd6 56. Kf5 Kc7 57. Kg6 Kxb7 58. Kxh6 Kc7 59. Kg7 Kd8 60. h4 Ke7 61. h5 1-0

[Event "Titled Tuesday intern op 30th Nov"]
[Site "Chess.com INT"]
[Date "2021.11.30"]
[Round "4"]
[White "Zhuravleva, Olga"]
[Black "Van der Werf, Mark"]
[Result "1-0"]
[ECO "C59"]
[WhiteElo "2278"]
[BlackElo "2387"]
[PlyCount "71"]
[EventDate "2021.11.30"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Be2 h6 9. Nf3 e4 10. Ne5 Bc5 11. c3 Bd6 12. f4 exf3 13. Nxf3 0-0 14. 0-0 c5 15. d4 Bb7 16. Kh1 Nc6 17. d5 Ne5 18. c4 Ng6 19. Nc3 Re8 20. Bd3 Nf4 21. Bxf4 Bxf4 22. Nh4 Be5 23. Nf5 Bc8 24. Qf3 Rb8 25. Rae1 Rxb2 26. Na4 Rxa2 27. Nxc5 Ra3 28. Ne4 Bxf5 29. Qxf5 Rxd3 30. Nxf6+ Bxf6 31. Qxd3 Rxe1 32. Rxe1 g6 33. h3 Qa5 34. Qe4 Bg7 35. d6 Qa4 36. Qe8+ 1-0

[Event "NED-chT 2122"]
[Site "Netherlands"]
[Date "2021.11.27"]
[Round "4.7"]
[White "Guliyev, Namig"]
[Black "Van der Werf, Mark"]
[Result "1/2-1/2"]
[ECO "C78"]
[WhiteElo "2555"]
[BlackElo "2393"]
[PlyCount "87"]
[EventDate "2021.09.18"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]
[WhiteTeam "En Passant"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Nc3 Bd6 6. 0-0 0-0 7. Re1 Re8 8. d3 h6 9. a3 Bc5 10. b4 Ba7 11. Bb2 b5 12. Bb3 Nd4 13. Ba2 d6 14. h3 c6 15. Nb1 Nxf3+ 16. Qxf3 Be6 17. Nd2 Bxa2 18. Rxa2 a5 19. Raa1 Nh7 20. Qg3 Ng5 21. h4 Ne6 22. Nf3 Bb6 23. Qg4 Qf6 24. g3 Qg6 25. Qxg6 fxg6 26. Kg2 Rf8 27. Rf1 Ra7 28. Nh2 Nd4 29. bxa5 Rxa5 30. c3 Ne6 31. Rad1 Ra4 32. Nf3 Bc5 33. d4 exd4 34. cxd4 Bxa3 35. Ba1 Nc7 36. d5 cxd5 37. exd5 Bc5 38. Bd4 Bxd4 39. Nxd4 Nxd5 40. Nxb5 Nf6 41. Rxd6 Ra2 42. Nc3 Rc2 43. Nd1 Re2 44. Nc3 1/2-1/2

[Event "Titled Tuesday intern op 16th Nov"]
[Site "Chess.com INT"]
[Date "2021.11.16"]
[Round "7"]
[White "Dinu, Dumitru Daniel"]
[Black "Van der Werf, Mark"]
[Result "0-1"]
[ECO "C24"]
[WhiteElo "2208"]
[BlackElo "2387"]
[PlyCount "68"]
[EventDate "2021.11.16"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. e4 e5 2. Bc4 Nf6 3. d4 exd4 4. Nf3 Nxe4 5. Qxd4 Nf6 6. Nc3 Be7 7. Bg5 0-0 8. 0-0-0 d6 9. Rhe1 Qd7 10. Rxe7 Qxe7 11. Nd5 Nxd5 12. Bxe7 Nxe7 13. Bd3 Ng6 14. Ng5 Nc6 15. Qe3 Bg4 16. f3 Rae8 17. Qf2 Bd7 18. Bxg6 fxg6 19. Qh4 h6 20. Qc4+ Kh8 21. Ne4 Ne5 22. Qb3 Bc6 23. Qc3 g5 24. Ng3 Rf7 25. Re1 Rfe7 26. Re3 Rf7 27. Ne2 b6 28. Ng3 Bb7 29. b3 a5 30. a4 Ba6 31. Ne4 Bb7 32. Kb2 Rfe7 33. g3 d5 34. Nd2 c5 0-1

[Event "Titled Tuesday intern op 16th Nov"]
[Site "Chess.com INT"]
[Date "2021.11.16"]
[Round "10"]
[White "Kekic, Armin"]
[Black "Van der Werf, Mark"]
[Result "0-1"]
[ECO "C67"]
[WhiteElo "2164"]
[BlackElo "2387"]
[PlyCount "84"]
[EventDate "2021.11.16"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. 0-0 Nxe4 5. d4 Nd6 6. Bxc6 dxc6 7. dxe5 Nf5 8. Qxd8+ Kxd8 9. Nc3 Bd7 10. Rd1 Kc8 11. Ng5 Be8 12. Nce4 h6 13. Nf3 b6 14. Nd4 Nxd4 15. Rxd4 c5 16. Rd1 Bc6 17. Nc3 Be7 18. f4 Kb7 19. Be3 Rad8 20. Rxd8 Bxd8 21. Rd1 Re8 22. Kf2 a5 23. a4 f6 24. exf6 Bxf6 25. g3 Bxc3 26. bxc3 Bxa4 27. Rd2 Bc6 28. f5 h5 29. h3 Rf8 30. g4 g6 31. Kg3 hxg4 32. hxg4 gxf5 33. g5 a4 34. c4 Be4 35. Bf4 a3 36. Rd7 Rc8 37. g6 a2 38. Be5 f4+ 39. Kxf4 Bxg6 40. Ke3 Bxc2 41. Kd2 Ba4 42. Kc1 Bxd7 0-1

[Event "Titled Tuesday intern op 16th Nov"]
[Site "Chess.com INT"]
[Date "2021.11.16"]
[Round "3"]
[White "Provaznik, Michal"]
[Black "Van der Werf, Mark"]
[Result "0-1"]
[ECO "A01"]
[WhiteElo "2127"]
[BlackElo "2387"]
[PlyCount "58"]
[EventDate "2021.11.16"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. b3 e5 2. Bb2 d6 3. g3 g6 4. Bg2 Bg7 5. e3 Nf6 6. Ne2 0-0 7. 0-0 Re8 8. d4 exd4 9. Nxd4 d5 10. Nd2 c5 11. Ne2 Nc6 12. Nf4 Bg4 13. Qc1 d4 14. Nc4 Rc8 15. a4 h5 16. h4 Qd7 17. Re1 Bf5 18. Rd1 Be4 19. Bf1 Bf3 20. Re1 Nd5 21. Nxd5 Bxd5 22. Kh2 Bxc4 23. bxc4 Ne5 24. Bg2 dxe3 25. fxe3 Ng4+ 26. Kg1 Bxb2 27. Qxb2 Qd2 28. Rf1 Qxe3+ 29. Kh1 Qxg3 0-1

[Event "Titled Tuesday intern op 16th Nov"]
[Site "Chess.com INT"]
[Date "2021.11.16"]
[Round "1"]
[White "Sadhwani, Raunak"]
[Black "Van der Werf, Mark"]
[Result "1-0"]
[ECO "A22"]
[WhiteElo "2609"]
[BlackElo "2387"]
[PlyCount "61"]
[EventDate "2021.11.16"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. c4 e5 2. d3 c6 3. Nf3 d6 4. Nc3 Nf6 5. g3 Be7 6. Bg2 0-0 7. 0-0 Nbd7 8. e4 a6 9. a4 a5 10. d4 exd4 11. Nxd4 Nc5 12. b3 Re8 13. Qc2 Bf8 14. Ba3 g6 15. Rad1 Qb6 16. h3 Bg7 17. Kh2 h5 18. Bb2 Nfd7 19. Nce2 h4 20. g4 Nf8 21. f4 Qc7 22. Kh1 Qb6 23. Bc3 Nfe6 24. f5 Nxd4 25. Nxd4 Bxd4 26. Bxd4 Qxb3 27. Qf2 Nxe4 28. Qxh4 Ng3+ 29. Kh2 Nxf1+ 30. Rxf1 Qxc4 31. Qh8# 1-0

[Event "Titled Tuesday intern op 16th Nov"]
[Site "Chess.com INT"]
[Date "2021.11.16"]
[Round "9"]
[White "Van der Werf, Mark"]
[Black "Barbosa, Evandro Amorim"]
[Result "0-1"]
[ECO "A34"]
[WhiteElo "2387"]
[BlackElo "2509"]
[PlyCount "128"]
[EventDate "2021.11.16"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. Nf3 c5 2. c4 Nc6 3. Nc3 e5 4. e3 Nf6 5. d4 cxd4 6. exd4 e4 7. Ne5 Bd6 8. Nxc6 dxc6 9. Be2 0-0 10. Bg5 Re8 11. Qd2 h6 12. Bh4 Bf5 13. g4 Bg6 14. g5 Nh7 15. 0-0-0 Qc7 16. Bg3 Nxg5 17. Qe3 Rad8 18. c5 Bxg3 19. hxg3 Re7 20. Rh4 Red7 21. Rdh1 Rxd4 22. Qxg5 b6 23. Qe3 bxc5 24. g4 f6 25. b3 Qe5 26. Kc2 Rd3 27. Bxd3 Rxd3 28. Nd1 Rxe3 29. fxe3 c4 30. R4h2 cxb3+ 31. axb3 Bf7 32. Nb2 Qc5+ 33. Nc4 Bxc4 34. bxc4 Qxc4+ 35. Kb2 Qb4+ 36. Kc2 Qc5+ 37. Kb2 Qxe3 38. Rc2 Qb6+ 39. Ka2 Qa5+ 40. Kb2 Qb5+ 41. Ka2 Qd5+ 42. Kb2 e3 43. Re1 Qb5+ 44. Kc1 Qd3 45. Rce2 Qc3+ 46. Kb1 Qb4+ 47. Kc1 Qxg4 48. Rxe3 h5 49. Rd1 Qc4+ 50. Kd2 h4 51. Rc1 Qd4+ 52. Ke2 Qg4+ 53. Kd2 Kh7 54. Rcc3 Kh6 55. Kc2 g5 56. Rcd3 Qf5 57. Kc3 g4 58. Kb3 g3 59. Rd4 Qb5+ 60. Kc3 Qg5 61. Ree4 Kh5 62. Rd8 Qc1+ 63. Kb3 Qb1+ 64. Kc3 Qxe4 0-1

[Event "Titled Tuesday intern op 16th Nov"]
[Site "Chess.com INT"]
[Date "2021.11.16"]
[Round "2"]
[White "Van der Werf, Mark"]
[Black "Martin, Lewis"]
[Result "1-0"]
[ECO "D94"]
[WhiteElo "2387"]
[BlackElo "2205"]
[PlyCount "118"]
[EventDate "2021.11.16"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 c6 3. Nc3 d5 4. e3 g6 5. d4 Bg7 6. Be2 0-0 7. 0-0 dxc4 8. Bxc4 b5 9. Be2 a6 10. a3 Nbd7 11. e4 Bb7 12. e5 Nd5 13. Nxd5 cxd5 14. Bf4 e6 15. Qd2 Nb6 16. Bh6 Rc8 17. Qf4 f6 18. Bxg7 Kxg7 19. h4 fxe5 20. Qxe5+ Qf6 21. Qg3 Qf4 22. Qh3 Qf5 23. Qg3 Qf4 24. Qxf4 Rxf4 25. g3 Rf7 26. Ne5 Rfc7 27. Bg4 Kf6 28. Rae1 Re7 29. Re2 Nc4 30. f4 Nd6 31. Bf3 Nf5 32. Rd1 Nxg3 33. Rg2 Nf5 34. h5 Ne3 35. Ng4+ Nxg4 36. Bxg4 gxh5 37. Bxh5 Rg7 38. Rxg7 Kxg7 39. Rd2 Kf6 40. Kf2 a5 41. Be2 b4 42. axb4 axb4 43. Kf3 b3 44. Bd3 h6 45. Rh2 Kg7 46. Rg2+ Kf8 47. Rg6 Kf7 48. Rxh6 Rg8 49. Rh7+ Rg7 50. Rxg7+ Kxg7 51. Bb5 Kf6 52. Ba4 Ba6 53. Bxb3 Bb5 54. Bd1 Kf5 55. b4 Kf6 56. Be2 Bd7 57. Ba6 Ke7 58. b5 Bxb5 59. Bxb5 Kf6 1-0

[Event "Titled Tuesday intern op 16th Nov"]
[Site "Chess.com INT"]
[Date "2021.11.16"]
[Round "6"]
[White "Van der Werf, Mark"]
[Black "Shimelkov, Vasiliy"]
[Result "0-1"]
[ECO "E18"]
[WhiteElo "2387"]
[BlackElo "2159"]
[PlyCount "90"]
[EventDate "2021.11.16"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. Nf3 d5 2. c4 e6 3. g3 Nf6 4. Bg2 c5 5. cxd5 exd5 6. d4 b6 7. 0-0 Be7 8. Nc3 0-0 9. dxc5 bxc5 10. Bf4 Na6 11. Ne5 Bb7 12. Nc4 Qd7 13. Na5 Rad8 14. Nxb7 Qxb7 15. Qb3 Qc6 16. Rfd1 Nb4 17. a3 c4 18. Qa4 Qxa4 19. Nxa4 Nc6 20. Nc3 d4 21. Bxc6 dxc3 22. Rxd8 Rxd8 23. bxc3 a5 24. a4 Nd5 25. Be5 f6 26. Bd4 Rd6 27. Bxd5+ Rxd5 28. e3 Kf7 29. Rb1 Ke6 30. Rb6+ Rd6 31. Rxd6+ Bxd6 32. Kf1 Bc7 33. Ke2 g6 34. e4 g5 35. f3 f5 36. exf5+ Kxf5 37. Ke3 h5 38. Bc5 g4 39. fxg4+ Kxg4 40. Kd4 Kh3 41. Kxc4 Kxh2 42. Bf2 Bxg3 43. Bd4 h4 44. Kb5 h3 45. Kxa5 Kg2 0-1

[Event "Titled Tuesday intern op 16th Nov"]
[Site "Chess.com INT"]
[Date "2021.11.16"]
[Round "8"]
[White "Van der Werf, Mark"]
[Black "Shyam, Nikil P"]
[Result "1/2-1/2"]
[ECO "A09"]
[WhiteElo "2387"]
[BlackElo "2442"]
[PlyCount "107"]
[EventDate "2021.11.16"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. Nf3 d5 2. c4 d4 3. g3 Nc6 4. Bg2 e5 5. d3 Bb4+ 6. Bd2 a5 7. Bxb4 axb4 8. 0-0 Nf6 9. Nbd2 0-0 10. Ne1 Nd7 11. Nb3 Qe7 12. Nc2 Nc5 13. Nxc5 Qxc5 14. Qd2 Bd7 15. a3 bxa3 16. b4 Qe7 17. b5 Nd8 18. Qb4 c5 19. bxc6 Qxb4 20. Nxb4 Nxc6 21. Nd5 Ra5 22. Rfb1 Rb8 23. Nb6 Bg4 24. f3 Be6 25. Rb3 Kf8 26. Rbxa3 Rxa3 27. Rxa3 Ke7 28. f4 exf4 29. gxf4 Kd6 30. Kf2 f6 31. Ra1 g5 32. Be4 h6 33. Nd5 Bxd5 34. Bxd5 Re8 35. Rb1 Kc7 36. h4 Re3 37. fxg5 fxg5 38. hxg5 hxg5 39. Rg1 Re5 40. Rh1 Ne7 41. Rh7 b5 42. cxb5 Rxd5 43. Rxe7+ Kb6 44. Rg7 Kxb5 45. Kf3 Re5 46. e4 dxe3 47. Ke2 Kc5 48. Rd7 Re8 49. d4+ Kc4 50. Rg7 Kxd4 51. Rxg5 Re4 52. Ra5 Re5 53. Rxe5 Kxe5 54. Kxe3 1/2-1/2

[Event "Titled Tuesday intern op 16th Nov"]
[Site "Chess.com INT"]
[Date "2021.11.16"]
[Round "5"]
[White "Van der Werf, Mark"]
[Black "Steil Antoni, Fiona"]
[Result "1-0"]
[ECO "A41"]
[WhiteElo "2387"]
[BlackElo "2163"]
[PlyCount "99"]
[EventDate "2021.11.16"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. Nf3 d6 2. d4 Bg4 3. e4 Nd7 4. Nc3 e5 5. Be2 Ngf6 6. Be3 Be7 7. d5 0-0 8. Nd2 Bxe2 9. Qxe2 c6 10. 0-0 Ne8 11. a4 f5 12. exf5 Rxf5 13. Nc4 Bg5 14. Rad1 c5 15. Qg4 g6 16. Bxg5 Rxg5 17. Qe6+ Kg7 18. Ne4 Rh5 19. Ncxd6 Ndf6 20. Nxf6 Nxf6 21. Nxb7 Qc7 22. Nd6 e4 23. g3 Rd8 24. Nxe4 Nxe4 25. Qxe4 Re5 26. Qf4 Qe7 27. c4 a5 28. h4 Re2 29. h5 Rd6 30. hxg6 hxg6 31. b3 g5 32. Qg4 Rh6 33. Kg2 Re4 34. Qf3 g4 35. Qf5 Re5 36. Qxg4+ Rg5 37. Qf3 Rf6 38. Qd3 Rh6 39. Rh1 Rgh5 40. Rxh5 Rxh5 41. d6 Qd7 42. Qf3 Qh3+ 43. Kg1 Qh2+ 44. Kf1 Qh3+ 45. Qg2 Qd7 46. Kg1 Rh6 47. Qe4 Qh3 48. d7 Qh5 49. d8Q Qh2+ 50. Kf1 1-0

[Event "Titled Tuesday intern op 16th Nov"]
[Site "Chess.com INT"]
[Date "2021.11.16"]
[Round "11"]
[White "Van der Werf, Mark"]
[Black "Tologontegin, Semetey"]
[Result "0-1"]
[ECO "B38"]
[WhiteElo "2387"]
[BlackElo "2381"]
[PlyCount "98"]
[EventDate "2021.11.16"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 c5 5. d4 cxd4 6. Nxd4 Nc6 7. Be3 d6 8. Be2 0-0 9. 0-0 Nxd4 10. Bxd4 Be6 11. b3 a6 12. f4 Rc8 13. f5 Bd7 14. Rc1 Bc6 15. fxg6 hxg6 16. e5 dxe5 17. Bxe5 Qa5 18. Bxf6 Bxf6 19. Nd5 Bxd5 20. cxd5 Rxc1 21. Qxc1 Qxd5 22. Bc4 Qd4+ 23. Kh1 Kg7 24. a4 Rh8 25. h3 Qe4 26. Rf3 Rh5 27. Qf4 Qb1+ 28. Rf1 Qb2 29. Qf2 Qc3 30. Qf3 Qe5 31. Qxb7 a5 32. Qf3 e6 33. Qe2 Qd4 34. Qd3 Qb2 35. Qe2 Qd4 36. Qd3 Qa7 37. Qe2 Qc7 38. Qf3 Qe5 39. Qe2 Qd6 40. Qd3 Qc7 41. Qf3 Qe7 42. Qe2 Be5 43. Qf3 Bb8 44. Qc3+ Kg8 45. Qf3 Qc7 46. Kg1 Ba7+ 47. Kh1 Bb8 48. Kg1 Qh2+ 49. Kf2 Rf5 0-1

[Event "Titled Tuesday intern op 16th Nov"]
[Site "Chess.com INT"]
[Date "2021.11.16"]
[Round "4"]
[White "Yanchenko, Roman"]
[Black "Van der Werf, Mark"]
[Result "1-0"]
[ECO "A31"]
[WhiteElo "2467"]
[BlackElo "2387"]
[PlyCount "39"]
[EventDate "2021.11.16"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 e5 5. Nf3 e4 6. Nd4 Nc6 7. Nc3 Bc5 8. Nb3 Be7 9. Bf4 0-0 10. e3 d5 11. cxd5 Nb4 12. d6 Bg4 13. Qd2 Nd3+ 14. Bxd3 Bxd6 15. Bxd6 Qxd6 16. Nxe4 Nxe4 17. Bxe4 Qe7 18. Bd5 Rad8 19. 0-0 Qg5 20. e4 1-0

[Event "Titled Tuesday intern op 09th Nov"]
[Site "Chess.com INT"]
[Date "2021.11.09"]
[Round "3"]
[White "Dahlgren, James Allen"]
[Black "Van der Werf, Mark"]
[Result "0-1"]
[ECO "A02"]
[WhiteElo "1845"]
[BlackElo "2387"]
[PlyCount "142"]
[EventDate "2021.11.09"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. d3 e5 2. f4 exf4 3. Bxf4 d5 4. Nc3 Nf6 5. e4 Bb4 6. e5 Nfd7 7. d4 c5 8. Nf3 cxd4 9. Nxd4 0-0 10. Bd3 Nc6 11. Nxc6 bxc6 12. 0-0 Nc5 13. Qh5 Nxd3 14. cxd3 Ba6 15. Rf3 Bc8 16. Raf1 Be7 17. Rg3 Kh8 18. Bh6 g6 19. Qf3 Be6 20. Bxf8 Qxf8 21. d4 Qd8 22. Qe3 c5 23. Ne2 cxd4 24. Nxd4 Bc5 25. Rd1 Qh4 26. Kh1 Rb8 27. a3 a5 28. Rd2 Kg8 29. Rf3 Bg4 30. Rff2 Be6 31. Qf4 Qe7 32. Nxe6 fxe6 33. Rf3 Qg7 34. Rdf2 Rf8 35. Qxf8+ Bxf8 36. Rxf8+ Qxf8 37. Rxf8+ Kxf8 38. Kg1 a4 39. Kf2 Ke7 40. Ke3 Kd7 41. Kd4 Kc6 42. g4 g5 43. h3 h6 44. Kd3 Kb5 45. Kd4 Kc6 46. Kc3 Kc5 47. b4+ axb3 48. Kxb3 d4 49. Kc2 Kd5 50. Kd3 Kxe5 51. a4 Kd5 52. a5 e5 53. a6 e4+ 54. Kc2 Kc6 55. h4 d3+ 56. Kd2 Kb6 57. hxg5 hxg5 58. Ke3 Kxa6 59. Kxe4 d2 60. Kf5 d1Q 61. Kxg5 Qf3 62. Kh5 Kb6 63. Kh4 Kc6 64. g5 Kd6 65. g6 Ke6 66. Kg5 Ke7 67. Kh6 Kf8 68. Kg5 Kg7 69. Kh4 Qf4+ 70. Kh5 Qf5+ 71. Kh4 Qxg6 0-1

[Event "Titled Tuesday intern op 09th Nov"]
[Site "Chess.com INT"]
[Date "2021.11.09"]
[Round "7"]
[White "Lewtak, Damian"]
[Black "Van der Werf, Mark"]
[Result "0-1"]
[ECO "C66"]
[WhiteElo "2381"]
[BlackElo "2387"]
[PlyCount "182"]
[EventDate "2021.11.09"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. 0-0 d6 5. d4 exd4 6. Nxd4 Bd7 7. Re1 Be7 8. Nc3 0-0 9. Bxc6 bxc6 10. Bg5 c5 11. Nf5 Bxf5 12. exf5 Re8 13. Qf3 Rb8 14. b3 Nd7 15. Bxe7 Rxe7 16. Nd5 Rxe1+ 17. Rxe1 Ne5 18. Qg3 f6 19. f4 Nf7 20. Re6 Kh8 21. Re7 Qf8 22. Rxc7 Nh6 23. Qd3 Qe8 24. Re7 Qh5 25. Qe2 Qxe2 26. Rxe2 Nxf5 27. c3 h5 28. Ne7 Nxe7 29. Rxe7 a5 30. Ra7 c4 31. Rxa5 cxb3 32. Rxh5+ Kg8 33. axb3 Rxb3 34. Rd5 Rxc3 35. Rxd6 Rc2 36. Rd4 Kf7 37. h3 Kg6 38. Rd7 Rc4 39. g3 Rc2 40. Ra7 Rb2 41. g4 Rc2 42. Ra3 Rb2 43. Rf3 Rc2 44. Rf2 Rc3 45. Kg2 f5 46. Ra2 fxg4 47. hxg4 Rb3 48. Ra6+ Kf7 49. Rc6 Ra3 50. Kf2 Rb3 51. Rc7+ Kf6 52. Rc6+ Kf7 53. Rc5 Ra3 54. Re5 Kf6 55. Re3 Ra1 56. Rb3 Rc1 57. Rb6+ Kf7 58. Kg3 Rf1 59. f5 Re1 60. Kf4 Ra1 61. Kg5 Ra7 62. Rc6 Rb7 63. Ra6 Rc7 64. Ra4 Rb7 65. Kf4 Rc7 66. Ke5 Rb7 67. Rc4 Rb5+ 68. Kd6 Rb6+ 69. Kc7 Rb5 70. Kd7 Rb7+ 71. Kd6 Rb6+ 72. Ke5 Rb5+ 73. Kf4 Rb7 74. Rd4 Ra7 75. g5 Rb7 76. g6+ Kf6 77. Rd6+ Ke7 78. Re6+ Kf8 79. Ra6 Rb8 80. Ke5 Re8+ 81. Kd5 Rd8+ 82. Rd6 Rb8 83. Rc6 Ra8 84. Kc5 Rb8 85. Kd6 Rd8+ 86. Kc7 Ra8 87. Kd7 Ra7+ 88. Rc7 Rxc7+ 89. Kxc7 Ke7 90. Kc6 Kf6 91. Kd5 Kxf5 0-1

