[Event "Leiden op-B 12th"]
[Site "Leiden"]
[Date "2018.07.19"]
[Round "6"]
[White "Van Amsterdam, Jan"]
[Black "Evenhuis, Wybe"]
[Result "1-0"]
[ECO "B99"]
[PlyCount "53"]
[EventDate "2018.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Qc7 9. 0-0-0 Nbd7 10. Bd3 0-0 11. Rhe1 b5 12. e5 Bb7 13. Qh3 Nc5 14. exf6 Nxd3+ 15. Rxd3 gxf6 16. Bh6 Kh8 17. Bxf8 Bxf8 18. Qh4 b4 19. Rh3 h6 20. Ne4 Bxe4 21. Rxe4 Qc4 22. b3 Qf1+ 23. Re1 Qxg2 24. Rg3 Qd5 25. Qxf6+ Kh7 26. Qxf7+ Kh8 27. Rg8# 1-0

[Event "Leiden op-B 12th"]
[Site "Leiden"]
[Date "2018.07.13"]
[Round "1"]
[White "Geboers, Jimmy"]
[Black "Van Amsterdam, Jan"]
[Result "1-0"]
[ECO "D40"]
[WhiteElo "1863"]
[PlyCount "75"]
[EventDate "2018.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. d4 e6 2. c4 d5 3. Nc3 c5 4. e3 Nf6 5. Nf3 a6 6. cxd5 exd5 7. dxc5 Bxc5 8. a3 Nc6 9. b4 Bd6 10. Be2 0-0 11. 0-0 b5 12. Bb2 Bb7 13. Qb3 Ne5 14. Nxe5 Bxe5 15. Bf3 Qd6 16. g3 Rad8 17. Rfd1 Qe6 18. Bg2 Rfe8 19. Rd2 Re7 20. Rad1 Red7 21. a4 Bc6 22. axb5 axb5 23. Ne2 Bxb2 24. Rxb2 Bb7 25. Nd4 Qb6 26. Bf1 Ba6 27. Rc2 Rc7 28. Rxc7 Qxc7 29. Bxb5 Bxb5 30. Nxb5 Qd7 31. Nd4 Qh3 32. Nf3 h6 33. b5 g5 34. b6 g4 35. Nh4 Ne4 36. b7 Rb8 37. Rc1 Nd6 38. Qxd5 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2010.06.29"]
[Round "7"]
[White "Frijling, Jeroen"]
[Black "Van Amsterdam, Jan"]
[Result "1-0"]
[ECO "A32"]
[WhiteElo "1784"]
[BlackElo "1776"]
[PlyCount "69"]
[EventDate "2010.05.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 e6 2. c4 d5 3. Nf3 c5 4. cxd5 exd5 5. g3 Nc6 6. Bg2 Nf6 7. 0-0 cxd4 8. Nxd4 Bc5 9. e3 0-0 10. Nc3 a6 11. Nb3 Ba7 12. Nxd5 Be6 13. Nxf6+ Qxf6 14. Qf3 Qe7 15. Bd2 Rfd8 16. Bc3 Rd3 17. Rfd1 Rad8 18. Rxd3 Rxd3 19. Rd1 Qd7 20. Rxd3 Qxd3 21. Qe4 Qd1+ 22. Bf1 Kf8 23. Qxh7 f6 24. Qd3 Qg4 25. Bg2 Bb8 26. Nc5 Bc4 27. Qd2 Ne5 28. Bxe5 Bxe5 29. Nd7+ Ke7 30. Nxe5 fxe5 31. f3 Qe6 32. Qb4+ Kf6 33. Bh3 Qd5 34. Qf8+ Kg6 35. Bf5+ 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2010.06.22"]
[Round "6"]
[White "Van Amsterdam, Jan"]
[Black "Kettenis, John"]
[Result "1-0"]
[ECO "C30"]
[WhiteElo "1776"]
[BlackElo "1537"]
[PlyCount "81"]
[EventDate "2010.05.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. f4 d6 4. Nf3 Nc6 5. Bb5 Bd7 6. d3 a6 7. Bxc6 Bxc6 8. fxe5 dxe5 9. Nxe5 Bc5 10. Nxc6 bxc6 11. Qf3 Qd4 12. Ne2 Qe5 13. Qf4 Qxf4 14. Bxf4 Bb6 15. Ng3 0-0 16. h3 Rfe8 17. 0-0-0 Rab8 18. c3 c5 19. Rhe1 Rb7 20. Bg5 Nd7 21. Nf5 f6 22. Bf4 g6 23. Ne3 c6 24. Nc4 Bc7 25. Bxc7 Rxc7 26. d4 Kf8 27. e5 fxe5 28. dxe5 Re6 29. Rd6 Ke7 30. Rxe6+ Kxe6 31. Kd2 Nf8 32. Rf1 Ke7 33. Ke3 Ne6 34. h4 Ng7 35. g4 Ne6 36. Nd6 Nd8 37. h5 gxh5 38. gxh5 Ke6 39. Ke4 Rd7 40. Rf6+ Ke7 41. Kf5 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2010.06.15"]
[Round "5"]
[White "De Jeu, Marcel"]
[Black "Van Amsterdam, Jan"]
[Result "1-0"]
[ECO "C02"]
[WhiteElo "1912"]
[BlackElo "1776"]
[PlyCount "59"]
[EventDate "2010.05.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Nh6 6. a3 Qb6 7. b4 cxd4 8. cxd4 Nf5 9. Be3 Bd7 10. Bd3 Nxe3 11. fxe3 Be7 12. 0-0 Rc8 13. Nbd2 Qd8 14. Nb3 b6 15. Rc1 0-0 16. b5 Nb8 17. a4 Rxc1 18. Qxc1 Bb4 19. Qc2 h6 20. Qe2 Qe7 21. Rc1 Rc8 22. Bb1 Rxc1+ 23. Nxc1 Be8 24. Qc2 f5 25. exf6 gxf6 26. Qc8 Nd7 27. Bg6 Kf8 28. Bh5 f5 29. Nh4 Qxh4 30. Qxe8+ 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2010.06.08"]
[Round "4"]
[White "Van Amsterdam, Jan"]
[Black "Oei, Hway Ik"]
[Result "0-1"]
[ECO "B12"]
[WhiteElo "1776"]
[BlackElo "2126"]
[PlyCount "72"]
[EventDate "2010.05.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. f3 dxe4 4. fxe4 Nf6 5. Nc3 e5 6. Nf3 exd4 7. Qxd4 Qxd4 8. Nxd4 Bb4 9. Bd3 0-0 10. 0-0 Bc5 11. Nce2 Re8 12. Kh1 Nbd7 13. Nf5 Nxe4 14. Bxe4 Rxe4 15. Neg3 Re8 16. b3 Ne5 17. Bb2 Bxf5 18. Nxf5 f6 19. h3 Rad8 20. Rad1 Bf8 21. Rde1 Rd2 22. Ne3 Bc5 23. Bxe5 Rxe5 24. Nc4 Rxe1 25. Rxe1 Rf2 26. Rd1 b5 27. Nd2 Kf7 28. c3 Re2 29. b4 Bb6 30. c4 bxc4 31. Nxc4 Rxa2 32. Rd7+ Kg6 33. Rb7 Bf2 34. Kh2 Rc2 35. Nd6 Bd4 36. h4 Be5+ 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2010.06.01"]
[Round "3"]
[White "Zeevaarder, Michael"]
[Black "Van Amsterdam, Jan"]
[Result "1-0"]
[ECO "C12"]
[WhiteElo "1810"]
[BlackElo "1776"]
[PlyCount "95"]
[EventDate "2010.05.18"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. exf6 hxg5 7. fxg7 Rg8 8. Qh5 Rxg7 9. h4 gxh4 10. Rxh4 a6 11. Nf3 Qf6 12. Qe5 Qxe5+ 13. Nxe5 Nd7 14. Nd3 Bf8 15. g3 b6 16. Bg2 Bb7 17. 0-0-0 0-0-0 18. Rdh1 Be7 19. Rh7 Bf6 20. Rxg7 Bxg7 21. Ne2 Rh8 22. c3 c5 23. Kd2 Rxh1 24. Bxh1 a5 25. Bf3 Ba6 26. Bh5 f6 27. Bf7 Nf8 28. g4 c4 29. Ne1 Kd7 30. f4 Ke7 31. Bg8 Bb7 32. Nf3 Nd7 33. g5 e5 34. fxe5 fxe5 35. Ke3 Kd6 36. Nh4 Bh8 37. Nf5+ Kc6 38. g6 Bf6 39. Bf7 Bg5+ 40. Kf3 exd4 41. cxd4 Nf6 42. g7 a4 43. g8Q Nxg8 44. Bxg8 Bd2 45. Nc3 a3 46. Bxd5+ Kd7 47. Bxb7 Bxc3 48. bxc3 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2009.06.30"]
[Round "7"]
[White "Hilarius, Sander"]
[Black "Van Amsterdam, Jan"]
[Result "1/2-1/2"]
[ECO "D32"]
[WhiteElo "1935"]
[BlackElo "1730"]
[PlyCount "109"]
[EventDate "2009.05.19"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 e6 2. c4 d5 3. Nc3 c5 4. cxd5 cxd4 5. Qa4+ Bd7 6. Qxd4 exd5 7. Qxd5 Nc6 8. Nf3 Nf6 9. Qd1 Bc5 10. e3 Qe7 11. Be2 Rd8 12. 0-0 0-0 13. Nd4 Ne5 14. a3 a6 15. b4 Ba7 16. b5 axb5 17. Ncxb5 Bb8 18. a4 Nfg4 19. h3 Qh4 20. f4 Qg3 21. Bxg4 Bxg4 22. Qe1 Qxe1 23. Rxe1 Nd3 24. hxg4 Nxe1 25. Ba3 Rfe8 26. Rxe1 Bxf4 27. Kf2 Bb8 28. Kf3 Be5 29. Bc5 Ra8 30. Ra1 Rec8 31. Bd6 Bxd6 32. Nxd6 Rc7 33. N4b5 Rd7 34. Rc1 g6 35. Rc4 Kf8 36. Nc8 Ra6 37. Nc7 Rc6 38. Rxc6 bxc6 39. Na6 Ke8 40. Nc5 Rd5 41. Nb7 Rd7 42. Nbd6+ Kd8 43. a5 Rc7 44. Nb6 Ra7 45. Ke4 Kc7 46. Ndc4 Kb8 47. Ke5 Re7+ 48. Kd6 Re6+ 49. Kd7 Kb7 50. Nd6+ Ka6 51. Nbc4 Rf6 52. Kxc6 Rf2 53. Ne4 Rxg2 54. Nc5+ Ka7 55. Nd6 1/2-1/2

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2009.06.23"]
[Round "6"]
[White "Van Amsterdam, Jan"]
[Black "Van den Bosse, Bart"]
[Result "1/2-1/2"]
[ECO "B71"]
[WhiteElo "1730"]
[BlackElo "1785"]
[PlyCount "57"]
[EventDate "2009.05.19"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. f4 Bg7 7. e5 dxe5 8. fxe5 Nd5 9. Bb5+ Kf8 10. Bc4 e6 11. Nf3 Qb6 12. Bxd5 exd5 13. Qxd5 Be6 14. Qd6+ Qxd6 15. exd6 Bxc3+ 16. bxc3 Nd7 17. 0-0 Rc8 18. Bb2 h6 19. Nd4 Bc4 20. Rfe1 Kg7 21. a4 a6 22. Re7 Rhd8 23. Nb3 b6 24. Rd1 Nc5 25. Nxc5 Rxc5 26. Rb7 b5 27. axb5 axb5 28. Ba3 Re5 29. Ra7 1/2-1/2

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2009.06.16"]
[Round "5"]
[White "Schenkelaars, Vincent"]
[Black "Van Amsterdam, Jan"]
[Result "1-0"]
[ECO "D32"]
[WhiteElo "1718"]
[BlackElo "1730"]
[PlyCount "39"]
[EventDate "2009.05.19"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 e6 2. c4 d5 3. Nc3 c5 4. cxd5 cxd4 5. Qxd4 Nc6 6. Qd1 exd5 7. e3 Bc5 8. Qxd5 Qe7 9. Bb5 Bd7 10. a3 Nf6 11. Qd1 0-0-0 12. Qa4 a6 13. Bxa6 Nd4 14. Bb5 Nxb5 15. Nxb5 Bc6 16. Nf3 Kb8 17. Bd2 Qd7 18. Qf4+ Ka8 19. Nfd4 g5 20. Qxf6 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2009.06.09"]
[Round "4"]
[White "Van Amsterdam, Jan"]
[Black "Leeuwenburgh, Evert"]
[Result "0-1"]
[ECO "C29"]
[WhiteElo "1730"]
[BlackElo "2056"]
[PlyCount "42"]
[EventDate "2009.05.19"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. d3 Nxc3 6. bxc3 Be7 7. Nf3 c5 8. Be2 Nc6 9. 0-0 Be6 10. Qe1 0-0 11. Qg3 Kh8 12. Ng5 Qd7 13. d4 cxd4 14. Bd3 h6 15. Nh7 Rg8 16. Ng5 dxc3 17. Kh1 Raf8 18. Bh7 Bxg5 19. Bxg5 Kxh7 20. Qh4 Nxe5 21. Rf6 Ng6 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2009.06.02"]
[Round "3"]
[White "Merts, Henk"]
[Black "Van Amsterdam, Jan"]
[Result "0-1"]
[ECO "D36"]
[BlackElo "1730"]
[PlyCount "56"]
[EventDate "2009.05.19"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 e6 2. c4 d5 3. cxd5 exd5 4. Nc3 Nf6 5. Nf3 c6 6. Bg5 Be7 7. e3 h6 8. Bh4 0-0 9. Bd3 Nbd7 10. Qc2 c5 11. b3 cxd4 12. Nxd4 Ne5 13. Bf5 Bb4 14. 0-0 Bxf5 15. Nxf5 Rc8 16. Bxf6 Qxf6 17. Nxd5 Rxc2 18. Nxf6+ gxf6 19. Nxh6+ Kh7 20. Nf5 Ba3 21. h3 a6 22. Rfd1 Rfc8 23. e4 Bc5 24. Nd4 Bxd4 25. Rxd4 Rc1+ 26. Rxc1 Rxc1+ 27. Kh2 Rc2 28. f4 Nf3+ 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2009.05.26"]
[Round "2"]
[White "Van Amsterdam, Jan"]
[Black "Mourits, Wilbert"]
[Result "0-1"]
[ECO "B96"]
[WhiteElo "1730"]
[BlackElo "2023"]
[PlyCount "80"]
[EventDate "2009.05.19"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Nbd7 8. Qf3 Qc7 9. 0-0-0 b5 10. a3 Bb7 11. Bd3 Qb6 12. Nb3 Rc8 13. Rhe1 Be7 14. Qh3 h5 15. Qh4 b4 16. axb4 Qxb4 17. Kb1 Nc5 18. Nd4 Rb8 19. e5 Nxd3 20. Rxd3 Be4 21. Ncb5 Bxd3 22. cxd3 dxe5 23. Nc6 Qxb5 24. Nxb8 Ba3 25. Re2 Nd5 26. Qe1 Qxb8 27. Qa5 Bb4 28. Qxa6 0-0 29. Rc2 Qb6 30. Qa4 Rb8 31. Qb3 Qg1+ 32. Rc1 Qxg2 33. Bh4 Bd6 34. Qa2 Nb4 35. Qa7 Nxd3 36. Qxb8+ Bxb8 37. Rc8+ Kh7 38. Rxb8 Qxh2 39. Be7 exf4 40. Bd6 Qg1+ 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2009.05.19"]
[Round "1"]
[White "Stork, Ornett J"]
[Black "Van Amsterdam, Jan"]
[Result "0-1"]
[ECO "A60"]
[WhiteElo "2107"]
[BlackElo "1730"]
[PlyCount "122"]
[EventDate "2009.05.19"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 e6 2. c4 c5 3. d5 Nf6 4. Nc3 b5 5. cxb5 Bb7 6. e4 a6 7. bxa6 Nxa6 8. Bc4 Nb4 9. Bg5 Qa5 10. Bxf6 gxf6 11. Qf3 Nc2+ 12. Kd2 Nxa1 13. Qxf6 Qb4 14. Qxh8 Qxc4 15. Nge2 Qb4 16. Kc1 Ba6 17. dxe6 dxe6 18. Rd1 Bxe2 19. Nxe2 Rxa2 20. Rd8+ Kxd8 21. Qxf8+ Kd7 22. Qxf7+ Kd6 23. Qf8+ Kc7 24. Qe7+ Kb8 25. Qd6+ Ka8 26. Qd8+ Qb8 27. Qf6 Nb3+ 28. Kb1 Ra1+ 29. Kc2 Nd4+ 30. Nxd4 cxd4 31. Qxd4 Qc7+ 32. Kb3 Qb7+ 33. Kc2 Qc6+ 34. Kb3 Qb5+ 35. Kc2 Qe2+ 36. Kb3 Qb5+ 37. Kc2 Qa4+ 38. Qxa4+ Rxa4 39. Kd3 Kb7 40. f4 Kc6 41. g4 Rb4 42. h4 Rxb2 43. Kd4 Kd6 44. e5+ Ke7 45. Ke4 Rb4+ 46. Ke3 Kf7 47. h5 h6 48. Kf3 Rd4 49. Ke3 Rd1 50. Ke2 Rg1 51. Kf3 Rh1 52. Kg2 Rd1 53. Kf3 Ke7 54. Ke3 Kd7 55. Kf3 Kc6 56. g5 hxg5 57. fxg5 Rf1+ 58. Kg4 Kd5 59. h6 Kxe5 60. g6 Kf6 61. g7 Kf7 0-1

