[Event "Amsterdam Science Park op-D 3rd"]
[Site "Amsterdam"]
[Date "2013.07.12"]
[Round "7"]
[White "Kleiweg, Rene"]
[Black "Wierstra, Jelle"]
[Result "1-0"]
[ECO "C47"]
[WhiteElo "1485"]
[BlackElo "1528"]
[PlyCount "113"]
[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 d6 2. d4 Nf6 3. Nc3 Nbd7 4. Nf3 e5 5. dxe5 Nxe5 6. Nxe5 dxe5 7. Qxd8+ Kxd8 8. Bg5 Bb4 9. 0-0-0+ Bd7 10. Nd5 Be7 11. f3 c6 12. Nxe7 Kxe7 13. f4 h6 14. fxe5 hxg5 15. exf6+ gxf6 16. Be2 b5 17. h3 a5 18. Rhf1 Rad8 19. Rd3 Be6 20. a3 Rxd3 21. cxd3 b4 22. axb4 axb4 23. Kd2 c5 24. Ra1 Kd6 25. Ke3 Rc8 26. Ra6+ Rc6 27. d4 cxd4+ 28. Kxd4 Rxa6 29. Bxa6 f5 30. e5+ Kc6 31. Bc4 Kb6 32. b3 Kc6 33. Bxe6 fxe6 34. Kc4 f4 35. Kxb4 Kd5 36. Ka5 Kxe5 37. b4 Kd6 38. Kb6 e5 39. b5 e4 40. Ka7 e3 41. b6 e2 42. b7 e1Q 43. b8Q+ Kc5 44. Qc7+ Kd4 45. Qd8+ Kc4 46. Qxg5 Qe3+ 47. Kb7 Qe4+ 48. Kc7 Qh7+ 49. Kd6 Qd3+ 50. Ke6 Qe3+ 51. Kf5 Qc5+ 52. Kxf4 Qd4+ 53. Kg3 Qd3+ 54. Kh4 Qh7+ 55. Kg4 Qd7+ 56. Kg3 Qd3+ 57. Kh2 1-0

[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 "Verburg, Cees"]
[Black "Wierstra, Jelle"]
[Result "1/2-1/2"]
[ECO "C41"]
[WhiteElo "1546"]
[BlackElo "1528"]
[PlyCount "95"]
[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 d6 2. e4 Nd7 3. Nc3 e5 4. Nf3 Ngf6 5. h3 Be7 6. Be3 0-0 7. Qd2 c6 8. 0-0-0 Qc7 9. Bg5 b5 10. a3 a5 11. Bd3 Bb7 12. Bxb5 cxb5 13. Nxb5 Qc4 14. Nc3 Rfe8 15. b3 Qc6 16. Kb2 Nxe4 17. Nxe4 Qxe4 18. Bxe7 Rxe7 19. Rhe1 Qf5 20. dxe5 Bxf3 21. gxf3 dxe5 22. f4 Rae8 23. Qxa5 Qxf4 24. Qb5 Qf5 25. Rd3 g6 26. Red1 Nf6 27. Qc6 Kg7 28. Rf3 Re6 29. Qc3 Qe4 30. Re3 Qc6 31. Qd3 e4 32. Qd4 Qc7 33. Qd2 Qe5+ 34. Ka2 Rc8 35. c4 Re7 36. f3 Rd7 37. Qe2 Rxd1 38. Qxd1 Qh2+ 39. Kb1 Qxh3 40. Qe1 exf3 41. Qf2 Qf5+ 42. Ka1 Ng4 43. Qb2+ f6 44. Re7+ Kh6 45. Qc1+ Qg5 46. Qh1+ Qh5 47. Qc1+ g5 48. Qb1 1/2-1/2

[Event "Amsterdam Science Park op-D 3rd"]
[Site "Amsterdam"]
[Date "2013.07.06"]
[Round "1"]
[White "Hartman, Charles"]
[Black "Wierstra, Jelle"]
[Result "1/2-1/2"]
[ECO "B08"]
[BlackElo "1528"]
[PlyCount "65"]
[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 d6 2. Nf3 g6 3. e4 Nf6 4. Nc3 Bg7 5. Be2 0-0 6. 0-0 Nbd7 7. h3 e5 8. d5 Nc5 9. Bd3 c6 10. b4 Nxd3 11. Qxd3 cxd5 12. Nxd5 Nxd5 13. Qxd5 Qc7 14. Qd2 Be6 15. Bb2 f5 16. Ng5 Bc4 17. Rfe1 h6 18. Nf3 f4 19. Nh4 Kh7 20. a3 Qe7 21. Nf3 g5 22. Nh2 h5 23. f3 Rad8 24. Qc3 Be6 25. Rad1 Bh8 26. Qd3 Rg8 27. Kh1 a6 28. Ba1 b5 29. a4 Bc4 30. Qa3 bxa4 31. Qxa4 Qd7 32. Qa3 Qc6 33. c3 1/2-1/2

