[Event "Vlissingen HZ op 22nd"]
[Site "Vlissingen"]
[Date "2018.08.08"]
[Round "6"]
[White "Koedijk, Klaas Jan"]
[Black "Verwoert, Jef"]
[Result "0-1"]
[ECO "B35"]
[WhiteElo "1699"]
[BlackElo "2040"]
[PlyCount "74"]
[EventDate "2018.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 185 Extra"]
[Source "ChessBase"]
[SourceDate "2018.07.29"]
[SourceVersion "1"]
[SourceVersionDate "2018.07.29"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4 0-0 8. Bb3 Ng4 9. Nxc6 Nxe3 10. Nxd8 Nxd1 11. Rxd1 Bxc3+ 12. bxc3 Rxd8 13. 0-0 b6 14. Rd4 Bb7 15. f3 d6 16. Rfd1 Rac8 17. c4 Rc5 18. f4 Rdc8 19. e5 dxe5 20. Rd7 R8c7 21. fxe5 Bc8 22. Rxc7 Rxc7 23. Kf2 Kg7 24. Rd4 f6 25. exf6+ exf6 26. c3 f5 27. Bd1 Be6 28. Bb3 Kf6 29. g3 Ke5 30. Ke2 g5 31. Ke3 b5 32. Kd3 bxc4+ 33. Bxc4 Bxc4+ 34. Rxc4 Rxc4 35. Kxc4 Ke4 36. Kb3 f4 37. Kc2 Ke3 0-1

[Event "Vlissingen HZ op 22nd"]
[Site "Vlissingen"]
[Date "2018.08.04"]
[Round "1"]
[White "Koedijk, Klaas Jan"]
[Black "Afek, Yochanan"]
[Result "0-1"]
[ECO "B35"]
[WhiteElo "1699"]
[BlackElo "2248"]
[PlyCount "64"]
[EventDate "2018.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 185 Extra"]
[Source "ChessBase"]
[SourceDate "2018.07.29"]
[SourceVersion "1"]
[SourceVersionDate "2018.07.29"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4 Qa5 8. 0-0 0-0 9. Bb3 d6 10. f3 Bd7 11. Qd2 Rac8 12. Rae1 a6 13. a3 Rfe8 14. Kh1 Ne5 15. Bh6 Bh8 16. f4 Nc4 17. Bxc4 Rxc4 18. Bg5 Ng4 19. Nde2 Qc5 20. Qd5 Nf2+ 21. Kg1 Nh3+ 22. Kh1 Nxg5 23. fxg5 Qxd5 24. exd5 Rg4 25. Rf4 Rxg5 26. Ref1 Rf5 27. g4 Rxf4 28. Rxf4 Rc8 29. h3 f5 30. g5 b5 31. Kg2 a5 32. Kf3 h6 0-1

[Event "Groningen Combinatie op"]
[Site "Groningen"]
[Date "2018.05.12"]
[Round "5"]
[White "Hilwerda, Jonas"]
[Black "Koedijk, Klaas Jan"]
[Result "1-0"]
[ECO "B27"]
[WhiteElo "2130"]
[BlackElo "1681"]
[PlyCount "35"]
[EventDate "2018.05.10"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 184 Extra"]
[Source "ChessBase"]
[SourceDate "2018.06.28"]
[SourceVersion "1"]
[SourceVersionDate "2018.06.28"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Qxd4 Nf6 5. Nc3 Nc6 6. Qa4 Bg7 7. e5 Ng8 8. Bf4 f6 9. exf6 Nxf6 10. Bc4 d6 11. 0-0-0 Bd7 12. Rhe1 Na5 13. Nb5 Nxc4 14. Qxc4 Bxb5 15. Qxb5+ Qd7 16. Qb3 0-0-0 17. Ng5 Rdf8 18. Qc4+ 1-0

[Event "Groningen Combinatie op"]
[Site "Groningen"]
[Date "2018.05.12"]
[Round "4"]
[White "Koedijk, Klaas Jan"]
[Black "Rupert, Casper"]
[Result "0-1"]
[ECO "C06"]
[WhiteElo "1681"]
[BlackElo "2036"]
[PlyCount "74"]
[EventDate "2018.05.10"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 184 Extra"]
[Source "ChessBase"]
[SourceDate "2018.06.28"]
[SourceVersion "1"]
[SourceVersionDate "2018.06.28"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ne2 cxd4 8. cxd4 f6 9. exf6 Nxf6 10. 0-0 Bd6 11. Nf3 0-0 12. Bg5 Qe8 13. Re1 Ne4 14. Bh4 Bb4 15. Rf1 Rxf3 16. Bxe4 dxe4 17. gxf3 exf3 18. Nc3 Qh5 19. Bg3 Nxd4 20. Kh1 e5 21. a3 Bd6 22. Nb5 Nxb5 23. Qd5+ Qf7 24. Qxb5 Be6 25. Rac1 Re8 26. Rfd1 Bb8 27. Re1 a6 28. Qd3 Bd7 29. Qc3 Qd5 30. Rcd1 Qe6 31. Qe3 Bc6 32. Qg5 h6 33. Qe3 Kf7 34. Rd2 g5 35. Qd3 e4 36. Qf1 e3 37. Bxb8 exd2 0-1

[Event "Groningen op-B 55th"]
[Site "Groningen"]
[Date "2017.12.30"]
[Round "9"]
[White "Van der Hagen, Loek"]
[Black "Koedijk, Klaas Jan"]
[Result "1-0"]
[ECO "B34"]
[WhiteElo "1652"]
[BlackElo "1706"]
[PlyCount "49"]
[EventDate "2017.12.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 182 Extra"]
[Source "ChessBase"]
[SourceDate "2018.02.23"]
[SourceVersion "1"]
[SourceVersionDate "2018.02.23"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Bg7 5. Nc3 Nc6 6. Be3 Nf6 7. Nxc6 bxc6 8. e5 Ng8 9. Bd4 Qa5 10. Bc4 Nh6 11. e6 Bxd4 12. exd7+ Bxd7 13. Qxd4 0-0-0 14. Qf4 Ng4 15. 0-0 Qe5 16. Ba6+ Kc7 17. Qxe5+ Nxe5 18. Rfe1 f6 19. f4 Kb6 20. Bf1 Nf7 21. Rxe7 Nd6 22. Na4+ Kc7 23. Nc5 Nf5 24. Rf7 Ne3 25. Ne6+ 1-0

[Event "Groningen op-B 55th"]
[Site "Groningen"]
[Date "2017.12.29"]
[Round "8"]
[White "Koedijk, Klaas Jan"]
[Black "Van Nimwegen, Martijn"]
[Result "1/2-1/2"]
[ECO "B70"]
[WhiteElo "1706"]
[BlackElo "1485"]
[PlyCount "70"]
[EventDate "2017.12.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 182 Extra"]
[Source "ChessBase"]
[SourceDate "2018.02.23"]
[SourceVersion "1"]
[SourceVersionDate "2018.02.23"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 d6 5. Nc3 g6 6. Be2 Bg7 7. Nb3 Nf6 8. Bg5 0-0 9. 0-0 a6 10. f4 Re8 11. Kh1 b5 12. Bf3 Qc7 13. Bxf6 Bxf6 14. Nd5 Qd8 15. Nxf6+ exf6 16. e5 Bb7 17. exd6 Na5 18. Bxb7 Nxb7 19. Qd5 Nxd6 20. Rad1 Ne4 21. Qxd8 Raxd8 22. Kg1 Kg7 23. Rfe1 f5 24. Nd4 Rd6 25. Rxe4 fxe4 26. Nf5+ gxf5 27. Rxd6 Re6 28. Rd5 Kg6 29. Kf2 Rc6 30. c3 b4 31. cxb4 Rc2+ 32. Kg3 Rxb2 33. Rd6+ f6 34. Rxa6 Rxb4 35. Ra3 Rc4 1/2-1/2

[Event "Groningen op-B 55th"]
[Site "Groningen"]
[Date "2017.12.28"]
[Round "7"]
[White "Martinez, Anna"]
[Black "Koedijk, Klaas Jan"]
[Result "1-0"]
[ECO "A65"]
[WhiteElo "1793"]
[BlackElo "1706"]
[PlyCount "69"]
[EventDate "2017.12.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 182 Extra"]
[Source "ChessBase"]
[SourceDate "2018.02.23"]
[SourceVersion "1"]
[SourceVersionDate "2018.02.23"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Bd3 Bg7 8. Nge2 0-0 9. 0-0 Re8 10. Ng3 a6 11. a4 b6 12. Bg5 Nbd7 13. Qd2 Qc7 14. Bh6 Bh8 15. h4 Bb7 16. h5 c4 17. Bc2 Nc5 18. f3 Ncd7 19. Kf2 Ne5 20. Rh1 Nfd7 21. Nge2 Nc5 22. g4 Ned3+ 23. Kg2 Rad8 24. b3 Ne5 25. b4 Ncd3 26. Rab1 Qe7 27. Bg5 Bf6 28. Be3 Qc7 29. g5 Bh8 30. f4 Nd7 31. Bxd3 cxd3 32. Qxd3 Rc8 33. Bd4 Qd8 34. hxg6 fxg6 35. Rxh7 1-0

[Event "Groningen op-B 55th"]
[Site "Groningen"]
[Date "2017.12.27"]
[Round "6"]
[White "Koedijk, Klaas Jan"]
[Black "Muller, Kenneth"]
[Result "1-0"]
[ECO "B01"]
[WhiteElo "1706"]
[BlackElo "1767"]
[PlyCount "162"]
[EventDate "2017.12.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 182 Extra"]
[Source "ChessBase"]
[SourceDate "2018.02.23"]
[SourceVersion "1"]
[SourceVersionDate "2018.02.23"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. d4 Nf6 4. c4 Qd8 5. Nc3 c6 6. Nf3 Bg4 7. Be2 e6 8. 0-0 Be7 9. Be3 0-0 10. Qb3 Qc7 11. Rac1 Nbd7 12. Rfd1 Rad8 13. a3 e5 14. dxe5 Nxe5 15. Nxe5 Qxe5 16. h3 Bxe2 17. Nxe2 Bd6 18. Ng3 Nh5 19. Nxh5 Qxh5 20. Bd4 Bf4 21. Rb1 c5 22. Bc3 b6 23. Qc2 Rfe8 24. Rxd8 Rxd8 25. Re1 Bc7 26. Qa4 f6 27. Qxa7 Qf7 28. Qa4 Qd7 29. Qxd7 Rxd7 30. Kf1 Kf7 31. Ke2 Re7+ 32. Kd3 Rxe1 33. Bxe1 Ke6 34. Bc3 g6 35. b4 Bd6 36. bxc5 Bxc5 37. Bd4 Bxa3 38. Bxb6 Bb2 39. Bd4 Ba3 40. Kc3 Be7 41. Kb3 Kd6 42. Kb4 Kc6+ 43. Kc3 Kd6 44. Kb3 Kc6 45. Bc3 f5 46. Bb4 Bf6 47. Kc2 Bd4 48. f3 Be5 49. Kd3 Bf6 50. Ke3 Be5 51. f4 Bf6 52. g4 h5 53. g5 Bg7 54. Kd3 Bb2 55. Bc3 Bc1 56. Bd2 Bb2 57. Be3 Ba3 58. Kc3 Bf8 59. Kb3 Bd6 60. Ka4 Be7 61. Ka5 Bc5 62. Bd2 Bd6 63. Bc1 Bxf4 64. Bxf4 Kc5 65. Ka6 Kxc4 66. Kb6 Kd5 67. Kc7 Ke4 68. Bd2 f4 69. Kd6 Kf5 70. h4 Kg4 71. Be1 Kf3 72. Ke6 Ke2 73. Ba5 f3 74. Bb6 f2 75. Bxf2 Kxf2 76. Kf6 Kg3 77. Kxg6 Kxh4 78. Kh6 Kg4 79. g6 h4 80. g7 h3 81. g8Q+ Kf3 1-0

[Event "Groningen op-B 55th"]
[Site "Groningen"]
[Date "2017.12.24"]
[Round "4"]
[White "Koedijk, Klaas Jan"]
[Black "Johnson, Matthew"]
[Result "0-1"]
[ECO "B01"]
[WhiteElo "1706"]
[BlackElo "2055"]
[PlyCount "72"]
[EventDate "2017.12.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 182 Extra"]
[Source "ChessBase"]
[SourceDate "2018.02.23"]
[SourceVersion "1"]
[SourceVersionDate "2018.02.23"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Nf6 3. d4 Nxd5 4. c4 Nf6 5. Nc3 e6 6. Nf3 c6 7. Bg5 Be7 8. Bd3 h6 9. Be3 Bd6 10. 0-0 0-0 11. Ne4 Nxe4 12. Bxe4 Nd7 13. Bc2 Nf6 14. Qd3 Qc7 15. c5 Bf4 16. Qd2 Nd5 17. Qd3 f5 18. a3 Bd7 19. g3 Bxe3 20. fxe3 Nf6 21. Ne5 Rad8 22. Bb3 Kh7 23. Kg2 Bc8 24. Bc2 Ne4 25. Rf4 Nxc5 26. Qe2 Nd7 27. Nf3 Nf6 28. Ne5 c5 29. Rc1 b6 30. b4 Qd6 31. bxc5 bxc5 32. Rd1 cxd4 33. Rfxd4 Qc7 34. Rxd8 Rxd8 35. Rxd8 Qxd8 36. g4 Qd5+ 0-1

[Event "Groningen op-B 55th"]
[Site "Groningen"]
[Date "2017.12.23"]
[Round "3"]
[White "Kosse, Lukas"]
[Black "Koedijk, Klaas Jan"]
[Result "0-1"]
[ECO "B50"]
[WhiteElo "1492"]
[BlackElo "1706"]
[PlyCount "60"]
[EventDate "2017.12.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 182 Extra"]
[Source "ChessBase"]
[SourceDate "2018.02.23"]
[SourceVersion "1"]
[SourceVersionDate "2018.02.23"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. Nc3 Bg7 4. Bc4 Nc6 5. d3 Nf6 6. Be3 d6 7. d4 cxd4 8. Nxd4 0-0 9. h3 Bd7 10. 0-0 a6 11. a3 Rc8 12. Bb3 Na5 13. Nf3 Nxb3 14. cxb3 Bc6 15. Qd3 Qc7 16. Rac1 Qb8 17. Rfd1 b5 18. b4 Rfd8 19. Bf4 Qb7 20. Re1 d5 21. exd5 Nxd5 22. Nxd5 Bxd5 23. Rxc8 Rxc8 24. Be5 Bxe5 25. Rxe5 e6 26. Re3 Rc4 27. Ne5 Rc1+ 28. Kh2 Qc7 29. Re2 f6 30. Qe3 Qxe5+ 0-1

[Event "Vlissingen HZ op 21st"]
[Site "Vlissingen"]
[Date "2017.08.10"]
[Round "7"]
[White "Hoffman, Ron"]
[Black "Koedijk, Klaas Jan"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "2043"]
[BlackElo "1490"]
[PlyCount "25"]
[EventDate "2017.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 179 Extra"]
[Source "ChessBase"]
[SourceDate "2017.08.23"]
[SourceVersion "1"]
[SourceVersionDate "2017.08.23"]
[SourceQuality "1"]

1. d4 Nf6 2. Bf4 e6 3. e3 c5 4. c3 d5 5. Nd2 Be7 6. Bd3 b6 7. h3 0-0 8. Ngf3 Ba6 9. Bxa6 Nxa6 10. Qa4 Nc7 11. Ne5 Bd6 12. Qc6 Qe8 13. Qxd6 1-0

[Event "Vlissingen HZ op 21st"]
[Site "Vlissingen"]
[Date "2017.08.09"]
[Round "6"]
[White "Koedijk, Klaas Jan"]
[Black "Coenen, Eduard"]
[Result "1/2-1/2"]
[ECO "B06"]
[WhiteElo "1490"]
[BlackElo "2120"]
[PlyCount "145"]
[EventDate "2017.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 179 Extra"]
[Source "ChessBase"]
[SourceDate "2017.08.23"]
[SourceVersion "1"]
[SourceVersionDate "2017.08.23"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. Be3 a6 5. a4 b6 6. Qd2 Nd7 7. Bc4 Bb7 8. Nge2 e6 9. 0-0 Ngf6 10. f3 d5 11. exd5 Nxd5 12. Nxd5 exd5 13. Bd3 0-0 14. Bh6 c5 15. Bxg7 Kxg7 16. c3 Re8 17. Rae1 c4 18. Bc2 b5 19. f4 f5 20. Ng3 Qb6 21. Rxe8 Rxe8 22. Re1 Rxe1+ 23. Qxe1 Kf7 24. Qe2 bxa4 25. Bxa4 Bc6 26. Bxc6 Qxc6 27. Nf1 Qa4 28. Ne3 Nf6 29. h3 a5 30. Kh2 Qe8 31. Qf3 Qe6 32. g4 fxg4 33. Nxg4 Ne4 34. Ne5+ Kg7 35. Qg4 Qxg4 36. Nxg4 a4 37. Ne3 a3 38. bxa3 Nxc3 39. a4 Nxa4 40. Nxd5 c3 41. Ne3 Kf6 42. Kg3 Ke6 43. Kf3 Nb2 44. Ke2 h5 45. h4 Kd6 46. Nc2 Kd5 47. Ke3 Kc4 48. Ke4 Kb3 49. Ne1 Nc4 50. d5 Nd2+ 51. Kd3 Nc4 52. Kd4 Nd2 53. Kd3 Kb2 54. d6 Nb3 55. Kc4 Na5+ 56. Kd4 Nc6+ 57. Kc5 Nd8 58. d7 Kc1 59. Nd3+ Kd2 60. Nb4 Nf7 61. Kd5 Nd8 62. Ke5 Ke2 63. f5 gxf5 64. Kxf5 Kf3 65. Kg5 Ke4 66. Kxh5 Kf5 67. Nc2 Nf7 68. Nb4 Nd8 69. Nc2 Kf6 70. Kg4 Nf7 71. h5 Ne5+ 72. Kf4 Nxd7 73. Ke3 1/2-1/2

[Event "Vlissingen HZ op 21st"]
[Site "Vlissingen"]
[Date "2017.08.08"]
[Round "5"]
[White "Smeets, Pierre"]
[Black "Koedijk, Klaas Jan"]
[Result "1/2-1/2"]
[ECO "D75"]
[WhiteElo "2069"]
[BlackElo "1490"]
[PlyCount "48"]
[EventDate "2017.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 179 Extra"]
[Source "ChessBase"]
[SourceDate "2017.08.23"]
[SourceVersion "1"]
[SourceVersionDate "2017.08.23"]
[SourceQuality "1"]

1. Nf3 c5 2. c4 Nc6 3. g3 g6 4. Bg2 Bg7 5. 0-0 Nf6 6. Nc3 0-0 7. d4 d5 8. cxd5 Nxd5 9. Nxd5 Qxd5 10. Ne5 Qxd4 11. Nxc6 bxc6 12. Bxc6 Rb8 13. Qc2 Bb7 14. Rd1 Qb4 15. a3 Qb6 16. Bxb7 Rxb7 17. Rb1 Rc8 18. Be3 Qf6 19. Bd4 Qe6 20. Bxc5 Rb3 21. Rd3 Rxd3 22. exd3 Qf5 23. b4 Bd4 24. Rc1 a5 1/2-1/2

[Event "Vlissingen HZ op 21st"]
[Site "Vlissingen"]
[Date "2017.08.07"]
[Round "4"]
[White "Koedijk, Klaas Jan"]
[Black "Goormachtigh, Johan"]
[Result "1/2-1/2"]
[ECO "B48"]
[WhiteElo "1490"]
[BlackElo "2156"]
[PlyCount "59"]
[EventDate "2017.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 179 Extra"]
[Source "ChessBase"]
[SourceDate "2017.08.23"]
[SourceVersion "1"]
[SourceVersionDate "2017.08.23"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be2 a6 7. Be3 Nf6 8. a3 Be7 9. 0-0 0-0 10. f4 d6 11. Qe1 Nxd4 12. Bxd4 e5 13. Be3 exf4 14. Rxf4 Be6 15. Qg3 Nd7 16. Bd4 Ne5 17. Bd3 Qd8 18. a4 Bf6 19. Raf1 Nf3+ 20. R4xf3 Bxd4+ 21. Kh1 Be5 22. Qf2 Bg4 23. Rxf7 Be6 24. Rxf8+ Qxf8 25. Qe3 Qe7 26. g3 Bxc3 27. bxc3 Rc8 28. Qd4 Rc5 29. c4 Bd7 30. Rf4 1/2-1/2

[Event "Vlissingen HZ op 21st"]
[Site "Vlissingen"]
[Date "2017.08.06"]
[Round "2"]
[White "Koedijk, Klaas Jan"]
[Black "Nothnagel, Marian Can"]
[Result "0-1"]
[ECO "C54"]
[WhiteElo "1490"]
[BlackElo "2196"]
[PlyCount "48"]
[EventDate "2017.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 179 Extra"]
[Source "ChessBase"]
[SourceDate "2017.08.23"]
[SourceVersion "1"]
[SourceVersionDate "2017.08.23"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 d6 6. Bb3 0-0 7. 0-0 Bb6 8. Nbd2 Ne7 9. Nc4 Ng6 10. Nxb6 axb6 11. Be3 h6 12. Qd2 Kh7 13. Kh1 Nh5 14. Bc2 Qf6 15. d4 Ngf4 16. Ng1 g5 17. Ne2 Nxg2 18. Kxg2 Bh3+ 19. Kxh3 Qf3+ 20. Ng3 g4+ 21. Kh4 Qg2 22. Kxg4 f5+ 23. exf5 Nf6+ 24. Kh4 Qxh2# 0-1

[Event "Kiel op 30th"]
[Site "Kiel"]
[Date "2017.08.03"]
[Round "8.31"]
[White "Kreutz, Jonas"]
[Black "Koedijk, Klaas Jan"]
[Result "1/2-1/2"]
[ECO "B27"]
[WhiteElo "1826"]
[BlackElo "1444"]
[PlyCount "140"]
[EventDate "2017.07.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. c3 d5 4. e5 Nc6 5. d4 Bg7 6. Be2 Qb6 7. a3 Bg4 8. Nbd2 e6 9. h3 Bxf3 10. Nxf3 Nge7 11. b4 cxd4 12. cxd4 Nf5 13. Bb2 0-0 14. g4 Nfe7 15. h4 f6 16. exf6 Bxf6 17. h5 Rac8 18. hxg6 Nxg6 19. Qd2 Bg7 20. Qg5 Nf4 21. Kd2 Nxb4 22. Rxh7 Rc2+ 23. Kd1 Qc7 24. axb4 Rxb2 25. Rc1 Qd7 26. Bb5 Qf7 27. Ne5 Qf6 28. Qxf6 Rxf6 29. Rh2 Rxb4 30. Rc8+ Rf8 31. Rxf8+ Kxf8 32. Nd7+ Kg8 33. Bf1 Rxd4+ 34. Kc2 Rb4 35. Nc5 a5 36. Bd3 Nxd3 37. Kxd3 Rd4+ 38. Ke3 b6 39. Nd7 b5 40. f4 b4 41. Nc5 Rc4 42. Nd3 b3 43. g5 b2 44. Nxb2 Rc3+ 45. Nd3 a4 46. Ra2 a3 47. Kd2 d4 48. Ne1 Bf8 49. Nd3 Bd6 50. Ra1 Kg7 51. Re1 a2 52. Ra1 Ra3 53. Kc2 Kg6 54. Ne1 Bxf4 55. Kb2 Ra5 56. Rxa2 Rxa2+ 57. Kxa2 Bxg5 58. Kb3 Kf5 59. Kc2 Ke4 60. Nd3 e5 61. Nb4 Bf4 62. Kd1 d3 63. Ke1 Kf3 64. Nxd3 e4 65. Nxf4 Kxf4 66. Kf2 e3+ 67. Ke2 Ke4 68. Ke1 Kd3 69. Kd1 e2+ 70. Ke1 Ke3 1/2-1/2

[Event "Kiel op 30th"]
[Site "Kiel"]
[Date "2017.08.02"]
[Round "7"]
[White "Rohmann, Volker"]
[Black "Koedijk, Klaas Jan"]
[Result "0-1"]
[ECO "B34"]
[WhiteElo "1818"]
[BlackElo "1444"]
[PlyCount "100"]
[EventDate "2017.07.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Bg7 5. Nc3 Nc6 6. Be3 Nf6 7. Be2 0-0 8. 0-0 d5 9. exd5 Nxd5 10. Nxd5 Qxd5 11. Nxc6 bxc6 12. Bf3 Qb5 13. c3 Ba6 14. Qc2 Rab8 15. Rab1 c5 16. b3 Qd3 17. Qc1 Qxf1+ 18. Qxf1 Bxf1 19. Kxf1 Rbc8 20. c4 Rfd8 21. Bf4 Rd7 22. Rd1 Rxd1+ 23. Bxd1 Rd8 24. Bf3 Bc3 25. Ke2 e5 26. Bg5 Rd7 27. Bd5 Kg7 28. Kd3 Bd4 29. f3 f6 30. Bd2 Rd6 31. a4 Rb6 32. Kc2 Kf8 33. Ba5 Rb8 34. Bd2 Ke7 35. Bc1 Rd8 36. Kd3 Kd6 37. Bd2 Rb8 38. Kc2 h5 39. Be1 g5 40. Bd2 g4 41. f4 exf4 42. Bxf4+ Be5 43. Be3 Bxh2 44. Bf7 h4 45. Bh5 h3 46. gxh3 gxh3 47. Bg4 Rh8 48. Bf3 Be5 49. Kd3 h2 50. Bh1 Rg8 0-1

[Event "Kiel op 30th"]
[Site "Kiel"]
[Date "2017.08.01"]
[Round "6"]
[White "Koedijk, Klaas Jan"]
[Black "Fleischmann, Yannic"]
[Result "1/2-1/2"]
[ECO "C54"]
[WhiteElo "1444"]
[BlackElo "1614"]
[PlyCount "84"]
[EventDate "2017.07.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 h6 6. 0-0 0-0 7. Nbd2 d6 8. Bb3 Re8 9. Bc2 Bb6 10. Nb3 Ne7 11. d4 Ng6 12. Re1 Be6 13. dxe5 dxe5 14. Be3 Bc4 15. Nbd2 Bd3 16. Bxb6 axb6 17. Nf1 Nf4 18. Ng3 c5 19. Bxd3 Nxd3 20. Re2 c4 21. Ne1 Nc5 22. Rd2 Qc7 23. f3 Red8 24. Rxd8+ Rxd8 25. Qe2 b5 26. Rd1 Rd7 27. Qc2 Qd8 28. Rxd7 Qxd7 29. b4 Ne6 30. Ne2 Qd6 31. a4 Qc6 32. a5 Qd6 33. g3 Ne8 34. Kf2 N8c7 35. Ng2 Na6 36. Ne3 Nec7 37. Nf5 Qd7 38. f4 exf4 39. Nxf4 Nb8 40. Nh5 Ne8 41. Nf4 Nc6 42. Nd5 Qe6 1/2-1/2

[Event "Kiel op 30th"]
[Site "Kiel"]
[Date "2017.07.31"]
[Round "5"]
[White "Van Foreest, Machteld"]
[Black "Koedijk, Klaas Jan"]
[Result "1/2-1/2"]
[ECO "B35"]
[WhiteElo "1798"]
[BlackElo "1444"]
[PlyCount "70"]
[EventDate "2017.07.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Bg7 5. Nc3 Nc6 6. Be3 Nf6 7. f3 0-0 8. Bc4 Qb6 9. Bb3 Ng4 10. fxg4 Nxd4 11. 0-0 Qd6 12. Bxd4 Qxd4+ 13. Kh1 Qxd1 14. Raxd1 e6 15. Rd3 a6 16. Na4 b5 17. Nb6 Ra7 18. c3 Rb7 19. Rd6 Be5 20. Nxc8 Rxc8 21. Rxa6 b4 22. Rc1 bxc3 23. bxc3 Rxc3 24. Rxc3 Bxc3 25. h3 Rb4 26. Ra4 Rxa4 27. Bxa4 d5 28. exd5 exd5 29. Kg1 Kg7 30. Kf2 Kf6 31. Ke3 Ke5 32. Bb3 d4+ 33. Kd3 f5 34. gxf5 Kxf5 35. Bd5 Kf4 1/2-1/2

[Event "Kiel op 30th"]
[Site "Kiel"]
[Date "2017.07.30"]
[Round "3"]
[White "Hartwig, Frank"]
[Black "Koedijk, Klaas Jan"]
[Result "1-0"]
[ECO "A38"]
[WhiteElo "1984"]
[BlackElo "1444"]
[PlyCount "115"]
[EventDate "2017.07.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. c4 Bg7 4. Nc3 Nc6 5. g3 Nf6 6. Bg2 0-0 7. 0-0 d6 8. d3 Bg4 9. h3 Bd7 10. Be3 Qc8 11. Kh2 Rd8 12. Rc1 a6 13. Qd2 Na7 14. Nd5 Nxd5 15. cxd5 b6 16. Rfd1 Qb7 17. b3 Nb5 18. Bh6 Bh8 19. Bg5 Re8 20. Be3 Rac8 21. a4 Nc7 22. d4 Red8 23. Bg5 Re8 24. Bf4 Red8 25. Qe2 Ne8 26. Bg5 Nf6 27. e5 dxe5 28. Nxe5 Qa7 29. dxc5 Rxc5 30. Rxc5 bxc5 31. Nc6 Bxc6 32. dxc6 Rxd1 33. Qxd1 Qc7 34. Qd3 a5 35. Qa6 h5 36. Qb7 Qxb7 37. cxb7 Nd7 38. Bxe7 Be5 39. Bc6 Nb8 40. Bb5 Bc7 41. Bxc5 Kg7 42. Kg2 f6 43. b4 axb4 44. Bxb4 Bb6 45. Bd6 Ba7 46. Kf3 Kf7 47. g4 hxg4+ 48. Kxg4 Ke6 49. Bf4 Kd5 50. Be8 g5 51. Bc7 Ke6 52. f4 Ke7 53. Bb5 gxf4 54. Kxf4 Kf7 55. Kf5 Ke7 56. h4 Kf7 57. h5 Kg7 58. Ke6 1-0

[Event "Kiel op 30th"]
[Site "Kiel"]
[Date "2017.07.30"]
[Round "4"]
[White "Koedijk, Klaas Jan"]
[Black "Isler, Benjamin"]
[Result "1/2-1/2"]
[ECO "C07"]
[WhiteElo "1444"]
[BlackElo "1897"]
[PlyCount "84"]
[EventDate "2017.07.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 c5 4. c3 cxd4 5. cxd4 Bb4 6. e5 Nc6 7. Ngf3 Qb6 8. a3 Be7 9. Nb3 a5 10. Qc2 f6 11. Be3 a4 12. exf6 Bxf6 13. Nc5 Qa5+ 14. Bd2 Qa7 15. Bb5 Nge7 16. Qxa4 0-0 17. Qxa7 Nxa7 18. Bd3 Nac6 19. Bc3 Na5 20. Bc2 b6 21. Nb3 Nc4 22. Nbd2 Bb7 23. 0-0 Nc6 24. Nxc4 dxc4 25. Rfe1 Rfe8 26. Rad1 Rad8 27. Ba4 Re7 28. Bb5 Na5 29. Ne5 Bd5 30. Bxa5 bxa5 31. Nxc4 Rb8 32. a4 Bxc4 33. Bxc4 Rxb2 34. Rxe6 Rxe6 35. Bxe6+ Kf8 36. Kf1 Rb4 37. Bd7 Bxd4 38. Ke2 Rb2+ 39. Rd2 Rxd2+ 40. Kxd2 Bxf2 41. Ke2 Ke7 42. Bb5 Bc5 1/2-1/2

[Event "Kiel op 30th"]
[Site "Kiel"]
[Date "2017.07.29"]
[Round "2"]
[White "Koedijk, Klaas Jan"]
[Black "Neumann, Frank"]
[Result "0-1"]
[ECO "B15"]
[WhiteElo "1444"]
[BlackElo "2072"]
[PlyCount "94"]
[EventDate "2017.07.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 g6 2. d4 c6 3. Nc3 d5 4. Nf3 dxe4 5. Nxe4 Bg7 6. Be3 Nd7 7. Bc4 Ngf6 8. Nxf6+ Nxf6 9. 0-0 Nd5 10. c3 Nxe3 11. fxe3 0-0 12. Qd2 Qa5 13. Rf2 Qh5 14. Raf1 Bf5 15. Qe1 Be4 16. Nd2 Bd5 17. Be2 Qg5 18. Bc4 Bxc4 19. Nxc4 Qd5 20. Qe2 f5 21. b3 e5 22. Rd1 e4 23. Rdf1 b5 24. Nb2 Rab8 25. Qd2 Qd6 26. b4 a5 27. a3 axb4 28. axb4 Ra8 29. Qc2 Bh6 30. Re2 Ra3 31. Rfe1 Kh8 32. Rb1 Rfa8 33. Nd1 Qd5 34. Rb2 Qc4 35. Re1 Ra1 36. Rb1 Rxb1 37. Qxb1 Ra2 38. Qc1 Qb3 39. g3 Qa4 40. h3 Rc2 41. Qb1 Rd2 42. Nf2 Qc2 43. Qa1 Rxf2 44. Qa8+ Kg7 45. Qb7+ Kf6 46. Qxc6+ Kg5 47. h4+ Kg4 0-1

[Event "NED-ch U12 op"]
[Site "Borne"]
[Date "2013.08.10"]
[Round "12"]
[White "Segers, Job"]
[Black "Koedijk, Klaas Jan"]
[Result "0-1"]
[ECO "C44"]
[WhiteElo "841"]
[BlackElo "790"]
[PlyCount "60"]
[EventDate "2013.08.05"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 d5 4. Nxe5 dxe4 5. Nxc6 bxc6 6. Nc3 Nf6 7. Bg5 Bf5 8. Bc4 Bb4 9. 0-0 Bxc3 10. bxc3 0-0 11. Rb1 Qd6 12. Re1 Ng4 13. g3 Qg6 14. Bf4 e3 15. Bd3 exf2+ 16. Kf1 fxe1Q+ 17. Qxe1 Bxd3+ 18. cxd3 Qxd3+ 19. Kg1 Rfe8 20. Qd1 Qxd1+ 21. Rxd1 Re2 22. Bxc7 Rxa2 23. Re1 g6 24. h3 Nf2 25. Be5 Nxh3+ 26. Kh1 Nf2+ 27. Kg1 Nd3 28. Re3 Nxe5 29. dxe5 a5 30. c4 Rc2 0-1

[Event "NED-ch U12 op"]
[Site "Borne"]
[Date "2013.08.09"]
[Round "9"]
[White "Koedijk, Klaas Jan"]
[Black "Kalkman, Lorena"]
[Result "1/2-1/2"]
[ECO "D00"]
[WhiteElo "790"]
[BlackElo "1010"]
[PlyCount "35"]
[EventDate "2013.08.05"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. d4 d5 2. Nc3 c6 3. Bf4 Bf5 4. e3 Nf6 5. Nf3 e6 6. Bd3 Bg6 7. 0-0 Bd6 8. Bxd6 Qxd6 9. Bxg6 hxg6 10. h3 Nbd7 11. Qd3 0-0 12. e4 dxe4 13. Nxe4 Nxe4 14. Qxe4 Nf6 15. Qe5 Rad8 16. c3 Qxe5 17. Nxe5 Nd7 18. Rfe1 1/2-1/2

[Event "NED-ch U12 op"]
[Site "Borne"]
[Date "2013.08.09"]
[Round "10"]
[White "Kootstra, Harm Jan"]
[Black "Koedijk, Klaas Jan"]
[Result "1-0"]
[ECO "C62"]
[WhiteElo "845"]
[BlackElo "790"]
[PlyCount "107"]
[EventDate "2013.08.05"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. d4 Bd7 5. d5 Nce7 6. Bxd7+ Qxd7 7. 0-0 Nf6 8. Re1 g6 9. Bg5 Bg7 10. c4 0-0 11. Nc3 c6 12. Qa4 Rfe8 13. Rad1 cxd5 14. Qxd7 Nxd7 15. cxd5 Nb6 16. Nb5 Rac8 17. Nxd6 f6 18. Nxe8 Rxe8 19. Bc1 f5 20. exf5 Nxf5 21. d6 Nd7 22. Bf4 Re6 23. Nxe5 Bxe5 24. Bxe5 Kf7 25. Bf4 Nd4 26. Rxe6 Nxe6 27. Bg3 Kf6 28. f3 h5 29. h3 g5 30. h4 a6 31. Kf2 Kf5 32. Ke3 Nf4 33. Bxf4 gxf4+ 34. Kd3 Ke5 35. Kc4 b6 36. Kb4 Ke6 37. a4 Nf8 38. a5 b5 39. Kc5 Nd7+ 40. Kc6 Ne5+ 41. Kc7 Nd7 42. Re1+ Ne5 43. d7 Kf5 44. Rxe5+ Kxe5 45. d8R Ke6 46. Kc6 Ke7 47. Rd6 Ke8 48. Rd7 Kf8 49. Ra7 Ke8 50. Kd6 Kf8 51. Ke6 Kg8 52. Kf6 Kh8 53. Kg6 b4 54. Ra8# 1-0

[Event "NED-ch U12 op"]
[Site "Borne"]
[Date "2013.08.08"]
[Round "8"]
[White "Van Klaveren, Justus"]
[Black "Koedijk, Klaas Jan"]
[Result "1-0"]
[ECO "C48"]
[WhiteElo "1454"]
[BlackElo "790"]
[PlyCount "47"]
[EventDate "2013.08.05"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. Bb5 d6 5. Bxc6+ bxc6 6. h3 Ba6 7. d3 g6 8. 0-0 Bg7 9. Be3 0-0 10. Bd2 Qe7 11. Nh2 d5 12. Re1 d4 13. Ne2 Rfd8 14. f4 c5 15. fxe5 Qxe5 16. Bf4 Qe7 17. Rf1 c6 18. b3 Nh5 19. Bd2 Rd6 20. Nf3 Rd7 21. Qe1 Rb8 22. Rb1 Rbb7 23. Nf4 Nxf4 24. Bxf4 1-0

[Event "NED-ch U12 op"]
[Site "Borne"]
[Date "2013.08.07"]
[Round "7"]
[White "Koedijk, Klaas Jan"]
[Black "Kroon, Joppe"]
[Result "0-1"]
[ECO "A40"]
[WhiteElo "790"]
[BlackElo "1241"]
[PlyCount "66"]
[EventDate "2013.08.05"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. c4 g6 2. d4 Bg7 3. Nf3 c5 4. Be3 cxd4 5. Bxd4 Nf6 6. Nc3 Nc6 7. e4 Nxd4 8. Qxd4 d6 9. Bd3 0-0 10. Qe3 Bg4 11. 0-0 Bxf3 12. Qxf3 Qb6 13. b3 Nd7 14. Rfd1 Bxc3 15. Rac1 Bg7 16. Qh3 Ne5 17. Qh4 Nxd3 18. Rxd3 Rfe8 19. Rh3 h5 20. Rd1 Qa5 21. a4 a6 22. f3 b5 23. Rd5 Qb6+ 24. Qf2 Qxf2+ 25. Kxf2 bxa4 26. bxa4 Rab8 27. Ra5 Rb2+ 28. Kf1 Ra2 29. Rxa6 Rb8 30. Ra8 Rxa8 31. f4 Rb8 32. Rd3 Rb1+ 33. Rd1 Rxd1# 0-1

[Event "NED-ch U12 op"]
[Site "Borne"]
[Date "2013.08.07"]
[Round "6"]
[White "Reichardt, Robin"]
[Black "Koedijk, Klaas Jan"]
[Result "1-0"]
[ECO "E91"]
[WhiteElo "1492"]
[BlackElo "790"]
[PlyCount "137"]
[EventDate "2013.08.05"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. d4 c5 2. d5 Nf6 3. c4 g6 4. Nc3 Bg7 5. Nf3 0-0 6. e4 d6 7. Be2 Qa5 8. 0-0 Qb6 9. Rb1 e6 10. Be3 Na6 11. a3 exd5 12. exd5 Bf5 13. Bd3 Bxd3 14. Qxd3 Ng4 15. Bf4 Rad8 16. h3 Nf6 17. Bg5 Rd7 18. Rfe1 Qd8 19. Ne4 Nc7 20. Re2 Re8 21. Nxf6+ Bxf6 22. Bxf6 Qxf6 23. Rbe1 Rde7 24. Rxe7 Rxe7 25. Rxe7 Qxe7 26. b3 b6 27. Kf1 Kg7 28. Qc3+ Qf6 29. Qxf6+ Kxf6 30. h4 h6 31. Ke2 b5 32. Kd3 Kf5 33. b4 cxb4 34. axb4 a6 35. Kd4 bxc4 36. Kxc4 g5 37. hxg5 hxg5 38. Nd4+ Ke4 39. f3+ Ke5 40. Nc6+ Kf4 41. Nd8 f5 42. Nf7 g4 43. Nxd6 gxf3 44. gxf3 Ke5 45. Nf7+ Kf4 46. d6 Ne6 47. d7 Kxf3 48. Kd5 Nc7+ 49. Kd6 Nb5+ 50. Kc6 Nd4+ 51. Kd5 Nb5 52. d8Q Nc3+ 53. Kc4 Ne4 54. Ng5+ Kf4 55. Nxe4 Kxe4 56. Qa8+ Ke3 57. Qxa6 f4 58. Qf6 Ke4 59. Qe6+ Kf3 60. b5 Kg3 61. b6 f3 62. b7 f2 63. Qf6 Kg2 64. b8Q f1Q+ 65. Qxf1+ Kxf1 66. Qb2 Ke1 67. Kd3 Kf1 68. Qh2 Ke1 69. Qe2# 1-0

[Event "NED-ch U12 op"]
[Site "Borne"]
[Date "2013.08.06"]
[Round "4"]
[White "Gasimov, Rashad"]
[Black "Koedijk, Klaas Jan"]
[Result "0-1"]
[ECO "C48"]
[WhiteElo "900"]
[BlackElo "790"]
[PlyCount "96"]
[EventDate "2013.08.05"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 d6 5. Bxc6+ bxc6 6. 0-0 Ba6 7. Re1 g6 8. d3 Bg7 9. Bg5 0-0 10. d4 Re8 11. d5 Qd7 12. Bxf6 Bxf6 13. dxc6 Qxc6 14. Qd5 Bb7 15. Qb5 a6 16. Qxc6 Bxc6 17. Nd5 Bxd5 18. exd5 Rab8 19. b3 e4 20. Rad1 exf3 21. gxf3 Bc3 22. Rxe8+ Rxe8 23. Kf1 Kg7 24. Kg2 Re1 25. Rd3 Ba5 26. a3 Re2 27. b4 Bb6 28. c4 Rxf2+ 29. Kg3 Rc2 30. c5 dxc5 31. bxc5 Bxc5 32. h4 Bf2+ 33. Kh3 Bc5 34. a4 Ra2 35. Rc3 Bd6 36. Rc4 Ra3 37. Kg2 Rd3 38. Rc6 Rxd5 39. Rxa6 Bb4 40. Ra7 c5 41. a5 c4 42. Rb7 Bxa5 43. Rc7 Bxc7 44. Kf2 c3 45. f4 c2 46. f5 Rxf5+ 47. Kg2 c1Q 48. h5 Qf4 0-1

[Event "NED-ch U12 op"]
[Site "Borne"]
[Date "2013.08.06"]
[Round "3"]
[White "Koedijk, Klaas Jan"]
[Black "Lu, Ting Ting"]
[Result "1/2-1/2"]
[ECO "A10"]
[WhiteElo "790"]
[BlackElo "1120"]
[PlyCount "51"]
[EventDate "2013.08.05"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. c4 d5 2. cxd5 Qxd5 3. Nc3 Qd8 4. Nf3 Nc6 5. d4 Nf6 6. Bf4 a6 7. Qb3 e6 8. e4 Be7 9. d5 exd5 10. exd5 Nb8 11. g3 0-0 12. Bg2 Re8 13. 0-0 c6 14. Bxb8 Rxb8 15. dxc6 b5 16. Rfd1 Qc7 17. Ng5 Bc5 18. Re1 Rxe1+ 19. Rxe1 h6 20. Nge4 Nxe4 21. Bxe4 Be6 22. Bd5 Bxd5 23. Qxd5 Qa7 24. Qf3 Rd8 25. Re2 b4 26. Na4 1/2-1/2

[Event "NED-ch U12 op"]
[Site "Borne"]
[Date "2013.08.06"]
[Round "2"]
[White "Wiemann, Daniel"]
[Black "Koedijk, Klaas Jan"]
[Result "0-1"]
[ECO "C45"]
[WhiteElo "1348"]
[BlackElo "790"]
[PlyCount "138"]
[EventDate "2013.08.05"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 Nxd4 4. Nxd4 exd4 5. Qxd4 c5 6. Qd1 Nf6 7. e5 Qe7 8. Qe2 Nd5 9. Bd2 d6 10. exd6 Qxe2+ 11. Bxe2 Bxd6 12. Nc3 Be6 13. Bb5+ Ke7 14. 0-0 a6 15. Be2 Be5 16. Bf3 Rad8 17. Rfe1 Nxc3 18. Bxc3 Bxc3 19. bxc3 b5 20. Bg4 Rd6 21. Re2 Rhd8 22. Ree1 Kf8 23. Bxe6 fxe6 24. h3 Kf7 25. g3 Rd2 26. Rac1 b4 27. cxb4 cxb4 28. Kf1 Kf6 29. Re2 Rd1+ 30. Rxd1 Rxd1+ 31. Re1 Rxe1+ 32. Kxe1 Ke5 33. f4+ Kd4 34. Kd2 Kc4 35. h4 h5 36. Kc1 a5 37. Kb2 a4 38. Kb1 b3 39. cxb3+ axb3 40. axb3+ Kxb3 41. Kc1 Kc3 42. Kd1 Kd3 43. Ke1 Ke3 44. Kf1 Kf3 45. Kg1 Kxg3 46. Kh1 Kxf4 47. Kg2 e5 48. Kf2 e4 49. Ke2 e3 50. Ke1 Kf3 51. Kf1 g6 52. Ke1 e2 53. Kd2 Kf2 54. Kd3 e1Q 55. Kd4 Qe3+ 56. Kd5 Kf3 57. Kd6 Qc3 58. Kd5 Qb4 59. Kc6 Qa5 60. Kd6 Ke4 61. Kc6 Kd4 62. Kd6 Qd5+ 63. Kc7 Qe6 64. Kb7 Kc5 65. Ka7 Kb5 66. Kb7 Qe7+ 67. Kb8 Kc6 68. Ka8 Kb6 69. Kb8 Qb7# 0-1

[Event "NED-ch U12 op"]
[Site "Borne"]
[Date "2013.08.05"]
[Round "1"]
[White "Koedijk, Klaas Jan"]
[Black "Kouwenhoven, Derk"]
[Result "0-1"]
[ECO "B08"]
[WhiteElo "790"]
[BlackElo "1270"]
[PlyCount "58"]
[EventDate "2013.08.05"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. d4 Nf6 2. Nc3 g6 3. e4 d6 4. Bf4 Bg7 5. Nf3 Nbd7 6. e5 Nh5 7. Qd2 Nb6 8. Bh6 Rg8 9. d5 Bxe5 10. Nxe5 dxe5 11. Bb5+ Bd7 12. Qe3 f6 13. Bxd7+ Qxd7 14. 0-0-0 g5 15. Qf3 Nf4 16. g3 Qh3 17. d6 cxd6 18. Qxb7 Ne6 19. Nd5 Nxd5 20. Qxa8+ Kf7 21. Qxd5 Qxh6 22. Kb1 Rc8 23. Qb7 Rc7 24. Qd5 Qg6 25. Qd3 Qh5 26. h4 Nc5 27. hxg5 Qxh1 28. Qc4+ d5 29. Qxc5 Qxd1# 0-1

