[Event "Amsterdam Science Park op-D 3rd"]
[Site "Amsterdam"]
[Date "2013.07.11"]
[Round "6"]
[White "Wierstra, Jelle"]
[Black "Koolhaas, Hans"]
[Result "1-0"]
[ECO "D45"]
[WhiteElo "1528"]
[BlackElo "1483"]
[PlyCount "69"]
[EventDate "2013.07.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 155 Extra"]
[Source "ChessBase"]
[SourceDate "2013.08.26"]
[SourceVersion "1"]
[SourceVersionDate "2013.08.26"]
[SourceQuality "1"]

1. d4 c6 2. c4 d5 3. Nc3 e6 4. Nf3 Nd7 5. e3 Ngf6 6. Be2 Be7 7. 0-0 0-0 8. a3 dxc4 9. Bxc4 b5 10. Be2 a6 11. b4 Re8 12. Bb2 Bb7 13. Qc2 Rc8 14. Rfd1 Nd5 15. Bd3 N7f6 16. Nxd5 Nxd5 17. Be4 f5 18. Bd3 Rf8 19. Ne5 Bd6 20. Qd2 Be7 21. f4 Nf6 22. Rf1 Qd5 23. Rf3 Ne4 24. Qc2 g5 25. Bxe4 fxe4 26. Rg3 Rf5 27. h4 h6 28. hxg5 hxg5 29. Rf1 Bf6 30. Ng4 Bg7 31. Ne5 Rxe5 32. fxe5 Rf8 33. Rxf8+ Kxf8 34. Qf2+ Ke7 35. Rxg5 1-0

[Event "Amsterdam Science Park op-D 3rd"]
[Site "Amsterdam"]
[Date "2013.07.10"]
[Round "5"]
[White "Koolhaas, Hans"]
[Black "Meulmeester, Jacques"]
[Result "0-1"]
[ECO "A02"]
[WhiteElo "1483"]
[BlackElo "1479"]
[PlyCount "66"]
[EventDate "2013.07.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 155 Extra"]
[Source "ChessBase"]
[SourceDate "2013.08.26"]
[SourceVersion "1"]
[SourceVersionDate "2013.08.26"]
[SourceQuality "1"]

1. f4 Nc6 2. Nf3 d6 3. e3 Nf6 4. d3 g6 5. Be2 Bg7 6. Nc3 0-0 7. 0-0 b6 8. a3 Bb7 9. Bd2 e5 10. Rb1 Re8 11. fxe5 dxe5 12. e4 Nd4 13. Nxd4 exd4 14. Na2 Qe7 15. Bf3 Nd7 16. Nc1 Be5 17. Bg4 Nf6 18. Bh3 Qd6 19. g3 h5 20. Bf4 Bxf4 21. Rxf4 g5 22. Rf5 Re5 23. Qf1 Rxf5 24. Qxf5 Nh7 25. Nb3 Bc8 26. Qf1 g4 27. Bg2 Be6 28. e5 Qd8 29. Bxa8 Qxa8 30. Nxd4 Bd5 31. Nf5 Kf8 32. Qf2 Ng5 33. Nh4 Nh3+ 0-1

[Event "Amsterdam Science Park op-D 3rd"]
[Site "Amsterdam"]
[Date "2013.07.09"]
[Round "4"]
[White "Kleiweg, Rene"]
[Black "Koolhaas, Hans"]
[Result "0-1"]
[ECO "B17"]
[WhiteElo "1485"]
[BlackElo "1483"]
[PlyCount "122"]
[EventDate "2013.07.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 155 Extra"]
[Source "ChessBase"]
[SourceDate "2013.08.26"]
[SourceVersion "1"]
[SourceVersionDate "2013.08.26"]
[SourceQuality "1"]

1. e4 c6 2. Nc3 d5 3. d4 dxe4 4. Nxe4 Nd7 5. Nf3 Ngf6 6. Ng3 e6 7. Be2 Bd6 8. 0-0 0-0 9. c3 Qc7 10. Qc2 h6 11. Bd3 b6 12. Be3 Bb7 13. Ne4 Nxe4 14. Bxe4 Nf6 15. g3 Nxe4 16. Qxe4 c5 17. Qg4 f5 18. Qh5 f4 19. dxc5 fxe3 20. cxd6 Qc6 21. fxe3 Rxf3 22. Rxf3 Qxf3 23. Qxf3 Bxf3 24. Rf1 Bd5 25. Rf4 g5 26. Rd4 Bxa2 27. Kg2 b5 28. Kf3 e5 29. Rd2 Kf7 30. Ke4 Ke6 31. Rd1 Rd8 32. d7 h5 33. b4 Bc4 34. Rd2 Bf1 35. Rf2 Bh3 36. Rd2 Bf5+ 37. Kf3 e4+ 38. Kf2 Ke5 39. Ra2 Rxd7 40. Ra5 Rb7 41. c4 Bd7 42. h4 g4 43. Ke2 Be6 44. c5 Rc7 45. Ke1 Bd7 46. Ra6 Bc6 47. Kd2 Kd5 48. Kc3 Rf7 49. Ra2 Rf3 50. Rd2+ Ke5 51. Rd6 Rxe3+ 52. Kc2 Bd5 53. Rh6 Rxg3 54. Rxh5+ Kd4 55. Rh8 Rg2+ 56. Kd1 e3 57. Rd8 Kc4 58. h5 Bf3+ 59. Kc1 Rg1+ 60. Kc2 Be4+ 61. Kb2 e2 0-1

