[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2009.06.30"]
[Round "7"]
[White "Weiland, Harro"]
[Black "Aalbers, Klaas"]
[Result "1-0"]
[ECO "C40"]
[WhiteElo "1944"]
[BlackElo "1886"]
[PlyCount "79"]
[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. Nf3 f5 3. Nxe5 Qf6 4. Nc4 fxe4 5. Nc3 Qg6 6. d3 exd3 7. Bxd3 Qe6+ 8. Ne3 Nf6 9. Bc4 Qb6 10. Ncd5 Nxd5 11. Qh5+ Qg6 12. Qxg6+ hxg6 13. Nxd5 Bd6 14. Bf4 Bxf4 15. Nxf4 Rh4 16. g3 Rg4 17. h4 g5 18. hxg5 Nc6 19. Rh8+ Ke7 20. Rh5 Ne5 21. Be2 d6 22. Nd5+ Kf7 23. f4 Nc6 24. Kf2 Nd4 25. Bxg4 Bxg4 26. Rh4 Be6 27. Ne3 Re8 28. c3 Nc6 29. b3 b5 30. Re1 b4 31. f5 Bd7 32. cxb4 Ne5 33. Rd4 Bc6 34. Nd5 Bxd5 35. Rxd5 Ng4+ 36. Kf1 Ne3+ 37. Rxe3 Rxe3 38. Kf2 Rc3 39. Ra5 d5 40. Rc5 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2009.06.23"]
[Round "6"]
[White "Aalbers, Klaas"]
[Black "Stins, Johan"]
[Result "1/2-1/2"]
[ECO "B22"]
[WhiteElo "1886"]
[BlackElo "1886"]
[PlyCount "38"]
[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. d4 cxd4 3. c3 Nf6 4. e5 Nd5 5. Bc4 e6 6. Bxd5 exd5 7. cxd4 d6 8. Nf3 Nc6 9. Bf4 dxe5 10. Nxe5 Bb4+ 11. Nc3 0-0 12. 0-0 Bxc3 13. bxc3 Nxe5 14. Bxe5 Be6 15. Re1 Qd7 16. Re3 f6 17. Bf4 Bf7 18. Rg3 Rfe8 19. Be3 Re4 1/2-1/2

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2009.06.16"]
[Round "5"]
[White "Straver, Robert"]
[Black "Aalbers, Klaas"]
[Result "1/2-1/2"]
[ECO "A84"]
[WhiteElo "2184"]
[BlackElo "1886"]
[PlyCount "86"]
[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 d5 2. c4 c6 3. e3 e6 4. Nc3 f5 5. g4 fxg4 6. Qxg4 Nf6 7. Qg2 Bd6 8. Bd3 e5 9. cxd5 cxd5 10. dxe5 Bxe5 11. Nf3 Bxc3+ 12. bxc3 Qc7 13. Bd2 0-0 14. Rg1 Nc6 15. c4 Ne4 16. cxd5 Nxd2 17. Nxd2 Ne5 18. Be4 Bf5 19. d6 Bxe4 20. dxc7 Bxg2 21. Rxg2 Rac8 22. Rg5 Rfe8 23. Ke2 Rxc7 24. f4 Ng6 25. f5 Nf4+ 26. Kf3 Nd5 27. Re1 h6 28. Rg4 Rf7 29. e4 Rxf5+ 30. exf5 Rxe1 31. Rd4 Nf6 32. Rd8+ Re8 33. Rd4 Rc8 34. Nc4 Kf8 35. Ne5 b6 36. Ng6+ Kf7 37. Ne5+ Ke8 38. Rd6 Rc7 39. Nc6 Rd7 40. Re6+ Kf8 41. Ne5 Rd5 42. Ng6+ Kf7 43. Re7+ Kg8 1/2-1/2

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2009.06.09"]
[Round "4"]
[White "Aalbers, Klaas"]
[Black "Oei, Hway Ik"]
[Result "0-1"]
[ECO "B21"]
[WhiteElo "1886"]
[BlackElo "2175"]
[PlyCount "106"]
[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. d4 cxd4 3. c3 dxc3 4. Nxc3 e6 5. Nf3 a6 6. e5 Nc6 7. Bd3 Qc7 8. Qe2 Nge7 9. Bf4 Ng6 10. Bg3 Bb4 11. Rc1 Qa5 12. a3 Be7 13. 0-0 0-0 14. h4 f5 15. exf6 Rxf6 16. Ne4 Rf8 17. Neg5 Rxf3 18. Nxf3 Qh5 19. Rfe1 Bf6 20. Bxg6 Qxg6 21. Be5 d5 22. b4 Qf5 23. Bxf6 gxf6 24. Rxc6 bxc6 25. Nd4 Qe4 26. Qxe4 dxe4 27. Rxe4 e5 28. Nb3 Be6 29. Nc5 Bd5 30. Re2 a5 31. Rb2 axb4 32. axb4 Kf7 33. Kh2 Rg8 34. g3 Ra8 35. Rb1 Ra2 36. Kg1 h5 37. Nb7 Ke6 38. Nc5+ Kf5 39. Nb7 Ke4 40. Nd6+ Kf3 41. Rc1 Ke2 42. b5 Kd2 43. bxc6 Kxc1 44. c7 Be6 45. c8Q+ Bxc8 46. Nxc8 Kd2 47. Ne7 Ke1 48. Nf5 Rxf2 49. Ng7 e4 50. Nxh5 e3 51. g4 e2 52. Ng3 Rf4 53. Nf5 Rxf5 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2009.06.02"]
[Round "3"]
[White "Fritschy, Frits"]
[Black "Aalbers, Klaas"]
[Result "1/2-1/2"]
[ECO "A84"]
[WhiteElo "2115"]
[BlackElo "1886"]
[PlyCount "72"]
[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 d5 2. c4 c6 3. Nf3 e6 4. Nc3 f5 5. Bf4 Nf6 6. e3 Bd6 7. c5 Bxf4 8. exf4 0-0 9. Bd3 Nbd7 10. 0-0 Ne4 11. Ne2 Qe8 12. Nd2 Rf6 13. f3 Nxd2 14. Qxd2 Rh6 15. Ng3 Nf6 16. Rfe1 Qf7 17. Qa5 Bd7 18. Qc7 Be8 19. Qxf7+ Kxf7 20. b4 Bd7 21. a4 Rg8 22. b5 g5 23. fxg5 Rxg5 24. b6 axb6 25. cxb6 Bc8 26. a5 Nd7 27. Rab1 Nb8 28. f4 Rg8 29. a6 bxa6 30. b7 Bd7 31. Ra1 Rhg6 32. Bxa6 Ke8 33. Bf1 Kd8 34. Ne2 Kc7 35. Nc3 Rg4 36. g3 Rxf4 1/2-1/2

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2009.05.26"]
[Round "2"]
[White "Leeuwenburgh, Evert"]
[Black "Aalbers, Klaas"]
[Result "0-1"]
[ECO "C40"]
[WhiteElo "2056"]
[BlackElo "1886"]
[PlyCount "138"]
[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. Nf3 f5 3. Bc4 fxe4 4. Nxe5 d5 5. Qh5+ g6 6. Nxg6 Nf6 7. Qe5+ Be7 8. Nxh8 dxc4 9. Qb5+ Nc6 10. Qxc4 Qd5 11. Qxd5 Nxd5 12. 0-0 Be6 13. Nc3 Nxc3 14. dxc3 0-0-0 15. Re1 Rxh8 16. Rxe4 Bd5 17. Re1 Rg8 18. g3 Bd6 19. f4 h5 20. Be3 Ne7 21. Rad1 Bf3 22. Rxd6 cxd6 23. Bxa7 Nd5 24. Kf2 Bg4 25. c4 Nb4 26. a3 Nxc2 27. Re7 Rg6 28. Bb6 Re6 29. Rxe6 Bxe6 30. c5 Kd7 31. cxd6 Kxd6 32. Bd8 Nd4 33. Bf6 Nf5 34. h3 Nh6 35. Bg7 Nf7 36. h4 Bg4 37. Ke3 Kd5 38. Bc3 Nd6 39. b3 Nf5+ 40. Kf2 Bd1 41. Bd2 Bxb3 42. Bb4 Bd1 43. Bf8 Bg4 44. Bb4 Ke4 45. Bc5 Bh3 46. Bb6 Nh6 47. Bc5 b5 48. Bf8 Ng4+ 49. Ke2 Bg2 50. Bc5 Bf3+ 51. Kf1 Kf5 52. Bd4 Bc6 53. Ke2 Nh6 54. Bg7 Nf7 55. Bf8 Kg4 56. Kf2 Bd5 57. Ke3 Kxg3 58. f5 Kxh4 59. Kf4 Kh3 60. Be7 h4 61. Bf6 Bc4 62. Be7 Bd3 63. Bf6 Nd6 64. Bxh4 Kxh4 65. f6 Nf7 66. Ke3 Bc4 67. Kd4 Be6 68. Kc5 Bd7 69. Kb4 Kg5 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2008.07.01"]
[Round "7"]
[White "Aalbers, Klaas"]
[Black "Van den Bosse, Bart"]
[Result "1-0"]
[ECO "D00"]
[WhiteElo "1882"]
[BlackElo "1696"]
[PlyCount "19"]
[EventDate "2008.05.20"]
[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 d5 2. d4 dxe4 3. f3 Bf5 4. Nc3 Nf6 5. g4 Bg6 6. g5 Bh5 7. gxf6 exf3 8. Nxf3 exf6 9. Qe2+ Be7 10. Qb5+ 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2008.06.24"]
[Round "6"]
[White "Kubbenga, Michael"]
[Black "Aalbers, Klaas"]
[Result "1-0"]
[ECO "A84"]
[WhiteElo "1936"]
[BlackElo "1882"]
[PlyCount "35"]
[EventDate "2008.05.20"]
[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 d5 2. c4 c6 3. Nf3 e6 4. Nc3 f5 5. Bf4 Nf6 6. e3 Bd6 7. Bxd6 Qxd6 8. Qc2 0-0 9. Bd3 Ne4 10. g4 Nxf2 11. Qxf2 fxg4 12. Qh4 Rxf3 13. Bxh7+ Kf8 14. Qxg4 Rf6 15. 0-0-0 Na6 16. Rhg1 Qe7 17. Bg6 e5 18. Qh5 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2008.06.17"]
[Round "5"]
[White "Aalbers, Klaas"]
[Black "Fritschy, Frits"]
[Result "0-1"]
[ECO "C01"]
[WhiteElo "1882"]
[BlackElo "2100"]
[PlyCount "90"]
[EventDate "2008.05.20"]
[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. Be3 dxe4 4. f3 e5 5. Bc4 exd4 6. Qxd4 Qxd4 7. Bxd4 Nc6 8. Bc3 Bf5 9. Bb3 Bb4 10. Bxb4 Nxb4 11. a3 exf3 12. Nxf3 Nxc2+ 13. Bxc2 Bxc2 14. Kd2 Bxb1 15. Re1+ Ne7 16. Raxb1 0-0-0+ 17. Kc2 Rhe8 18. Ng5 Ng6 19. Nxf7 Rxe1 20. Rxe1 Rf8 21. Rf1 Kd7 22. Ne5+ Ke6 23. Nf3 c5 24. Re1+ Kd6 25. Rd1+ Kc6 26. Rd2 Rf5 27. Rf2 Nh4 28. Kd1 Nxg2 29. Rxg2 Rxf3 30. Rxg7 Rh3 31. Rg2 a5 32. a4 b5 33. axb5+ Kxb5 34. Kc2 Kb4 35. Rf2 c4 36. Rg2 h5 37. Re2 h4 38. Kb1 Kb3 39. Rf2 Re3 40. Rf1 h3 41. Ka1 a4 42. Kb1 a3 43. bxa3 c3 44. a4 Re2 45. a5 Rb2+ 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2008.06.10"]
[Round "4"]
[White "Aalbers, Klaas"]
[Black "Agaian, Jura"]
[Result "1-0"]
[ECO "B00"]
[WhiteElo "1882"]
[BlackElo "1840"]
[PlyCount "103"]
[EventDate "2008.05.20"]
[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. d4 e6 3. Nf3 b6 4. Bd3 Bb7 5. e5 Nc6 6. c3 Qc7 7. Bf4 f5 8. d5 exd5 9. Bxf5 Nge7 10. Bh3 h6 11. Bg3 g5 12. e6 d6 13. Nfd2 h5 14. f3 Bg7 15. 0-0 0-0-0 16. a4 Rdf8 17. Na3 a6 18. Qe2 h4 19. Bf2 Ne5 20. Nc2 N5g6 21. Be3 Nf4 22. Bxf4 Rxf4 23. Ne1 c4 24. Nc2 Qc5+ 25. Kh1 Kc7 26. Rfe1 Be5 27. Nf1 Rf6 28. Qe3 Qc6 29. Qxg5 Rhf8 30. Nd4 Qe8 31. Qxh4 Rh8 32. Qf2 Rxh3 33. gxh3 Qh5 34. Ng3 Qxh3 35. Qg2 Qh7 36. Kg1 Bc8 37. Re2 Rg6 38. Rae1 Rg5 39. Qf2 Ng6 40. a5 Nf4 41. Nb5+ Kd8 42. Qxb6+ Ke8 43. Qc6+ Kd8 44. Rxe5 dxe5 45. Qd6+ Bd7 46. Qc7+ Ke8 47. Nd6+ Kf8 48. Qd8+ Be8 49. Qxe8+ Kg7 50. Qf7+ Kh8 51. Qxh7+ Kxh7 52. e7 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2008.06.03"]
[Round "3"]
[White "Otten, Martijn"]
[Black "Aalbers, Klaas"]
[Result "0-1"]
[ECO "A84"]
[WhiteElo "1796"]
[BlackElo "1882"]
[PlyCount "84"]
[EventDate "2008.05.20"]
[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 d5 2. c4 c6 3. Nc3 e6 4. Bf4 f5 5. e3 Nf6 6. Nf3 Bd6 7. Bxd6 Qxd6 8. Qb3 Nbd7 9. c5 Qe7 10. Qa4 Ne4 11. Bd3 0-0 12. Rb1 g5 13. h3 e5 14. Bc2 exd4 15. Nxd4 Ndxc5 16. Qa3 Re8 17. Nxe4 Nxe4 18. Qxe7 Rxe7 19. Bxe4 Rxe4 20. Kd2 Bd7 21. f3 Re7 22. b4 Rae8 23. Rhe1 Kf7 24. Re2 Kf6 25. g3 Ke5 26. Rf1 f4 27. Kd3 fxg3 28. Rg1 Kf6 29. Rxg3 h5 30. f4 g4 31. Reg2 h4 32. Nxc6 bxc6 33. Rxg4 Bxg4 34. Rxg4 Rxe3+ 35. Kd4 Rxh3 36. Rg5 Re4+ 37. Kc5 Rc3+ 38. Kd6 Rxf4 39. Rh5 Rxb4 40. a3 Rxa3 41. Kxc6 Rc3+ 42. Kxd5 Rb5+ 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2008.05.27"]
[Round "2"]
[White "Aalbers, Klaas"]
[Black "Van 't Hof, Eric"]
[Result "0-1"]
[ECO "B13"]
[WhiteElo "1882"]
[BlackElo "2041"]
[PlyCount "62"]
[EventDate "2008.05.20"]
[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. exd5 cxd5 4. Bd3 Nf6 5. Nf3 Nc6 6. c3 Bg4 7. 0-0 e6 8. Nbd2 Bd6 9. Re1 0-0 10. Nf1 a6 11. Bg5 b5 12. Ne3 Bh5 13. g4 Bg6 14. a3 Bxd3 15. Qxd3 Be7 16. Nd2 Na5 17. Qe2 Re8 18. Rab1 Nc4 19. Bxf6 Bxf6 20. f4 a5 21. Nf3 Nxe3 22. Qxe3 b4 23. axb4 axb4 24. g5 Be7 25. h4 bxc3 26. bxc3 Ra3 27. h5 Qc7 28. g6 Bf6 29. gxf7+ Qxf7 30. Re2 Qxh5 31. Rh2 Qg6+ 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2008.05.20"]
[Round "1"]
[White "Moene, Jelle"]
[Black "Aalbers, Klaas"]
[Result "0-1"]
[ECO "C34"]
[BlackElo "1882"]
[PlyCount "40"]
[EventDate "2008.05.20"]
[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. f4 exf4 3. Nf3 d6 4. Bc4 Be6 5. c3 Nc6 6. Bb5 g5 7. h4 g4 8. Ng5 Bd7 9. Qb3 Qe7 10. Bc4 Nh6 11. 0-0 Na5 12. Qb4 Nxc4 13. Qxc4 f6 14. Nxh7 Rxh7 15. Qxc7 Qxe4 16. d4 f3 17. Bd2 Qc6 18. Qa5 Qb5 19. Qa3 fxg2 20. Kxg2 Nf5 0-1

[Event "Leiden Noteboom Memorial 68th"]
[Site "Leiden"]
[Date "2008.02.03"]
[Round "6"]
[White "Aalbers, Klaas"]
[Black "Van Delft, Merijn"]
[Result "0-1"]
[ECO "B21"]
[BlackElo "2390"]
[PlyCount "54"]
[EventDate "2008.02.01"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 122 Extra"]
[Source "ChessBase"]
[SourceDate "2008.03.04"]
[SourceVersion "1"]
[SourceVersionDate "2008.03.04"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 Nf6 4. Bd3 dxc3 5. Nxc3 Nc6 6. Nf3 d6 7. h3 g6 8. 0-0 Bg7 9. Qe2 0-0 10. Rd1 Nd7 11. Bf4 a6 12. Rac1 Nde5 13. Nxe5 Nxe5 14. Bxe5 Bxe5 15. Nd5 e6 16. Ne3 b5 17. Ng4 Bg7 18. Rc2 Bb7 19. Nh2 Rc8 20. Rdc1 Qd7 21. b3 Rxc2 22. Rxc2 Rc8 23. Rxc8+ Qxc8 24. Qc2 Qxc2 25. Bxc2 f5 26. f3 Bd4+ 27. Kf1 Be5 0-1

[Event "Leiden Noteboom Memorial 68th"]
[Site "Leiden"]
[Date "2008.02.02"]
[Round "3"]
[White "Coene, Igor"]
[Black "Aalbers, Klaas"]
[Result "1-0"]
[ECO "A84"]
[WhiteElo "2104"]
[PlyCount "47"]
[EventDate "2008.02.01"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 122 Extra"]
[Source "ChessBase"]
[SourceDate "2008.03.04"]
[SourceVersion "1"]
[SourceVersionDate "2008.03.04"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 e6 4. Nc3 f5 5. g4 fxg4 6. Ne5 Nf6 7. Bg5 Be7 8. h3 g3 9. fxg3 Nbd7 10. Nf3 0-0 11. Qc2 Nh5 12. Bxe7 Qxe7 13. 0-0-0 Nb6 14. Ne5 Nd7 15. Ng4 Nb6 16. e3 Nxg3 17. Bd3 Qh4 18. Rhg1 Qxh3 19. Rxg3 Qxg3 20. Bxh7+ Kf7 21. Qg6+ Ke7 22. Qxg7+ Rf7 23. Qg5+ Kf8 24. Qd8+ 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2007.06.26"]
[Round "7"]
[White "Aalbers, Klaas"]
[Black "Irwin, Mark"]
[Result "0-1"]
[ECO "B21"]
[WhiteElo "1827"]
[BlackElo "2280"]
[PlyCount "52"]
[EventDate "2007.05.15"]
[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. d4 cxd4 3. c3 dxc3 4. Nxc3 e6 5. Nf3 Ne7 6. Bd3 Ng6 7. 0-0 Be7 8. Qe2 0-0 9. Rd1 d6 10. Be3 Nc6 11. Rac1 Bd7 12. Bb1 Qb8 13. a3 Rc8 14. Qb5 Nce5 15. Qe2 Nc4 16. Bd3 Nxe3 17. Qxe3 b5 18. b4 a6 19. h4 Qa7 20. Qxa7 Rxa7 21. e5 Nxe5 22. Nxe5 dxe5 23. Ne4 Rac7 24. Rb1 f5 25. Nd6 Bxd6 26. Bxf5 exf5 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2007.06.12"]
[Round "5"]
[White "Aalbers, Klaas"]
[Black "Landheer, Ronald"]
[Result "0-1"]
[ECO "C01"]
[WhiteElo "1827"]
[BlackElo "1701"]
[PlyCount "104"]
[EventDate "2007.05.15"]
[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. Be3 dxe4 4. f3 Nf6 5. Nd2 Nd5 6. Qe2 c5 7. c3 Nxe3 8. Qxe3 cxd4 9. cxd4 Nc6 10. Bb5 Bb4 11. fxe4 Bxd2+ 12. Qxd2 Qh4+ 13. Qf2 Qxe4+ 14. Qe2 Qxe2+ 15. Nxe2 Bd7 16. 0-0 0-0 17. Rad1 a6 18. Ba4 b5 19. Bc2 Rad8 20. Be4 Ne7 21. Rc1 Rc8 22. Rc5 Bc6 23. Bxc6 Rxc6 24. Rfc1 Rfc8 25. b4 Kf8 26. Nf4 Ke8 27. Kf2 Rxc5 28. dxc5 Nc6 29. a4 Rd8 30. axb5 axb5 31. Ra1 Nxb4 32. Ra7 Rc8 33. Nh5 Nd3+ 34. Ke3 Nxc5 35. Nxg7+ Kf8 36. Nh5 b4 37. Ra5 Ke7 38. Ra7+ Nd7 39. Rb7 Rb8 40. Rxb8 Nxb8 41. Kd4 Nc6+ 42. Kc4 e5 43. Ng3 Ke6 44. Ne4 f5 45. Ng5+ Kd6 46. Nxh7 e4 47. Ng5 Ke5 48. h4 Kf4 49. Ne6+ Kg4 50. g3 e3 51. Nc5 Kxg3 52. h5 e2 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2007.06.05"]
[Round "4"]
[White "Aalbers, Klaas"]
[Black "Vreugdenhil, Frans"]
[Result "1-0"]
[ECO "C37"]
[WhiteElo "1827"]
[BlackElo "1944"]
[PlyCount "47"]
[EventDate "2007.05.15"]
[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. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. d4 gxf3 6. Qxf3 d5 7. Bxd5 Nf6 8. Qxf4 Nxd5 9. exd5 Qxd5 10. Nc3 Bb4 11. Bd2 Bxc3 12. Bxc3 Qd6 13. Qf3 Qe6+ 14. Kd2 Qh6+ 15. Kd3 Qg6+ 16. Kd2 Qg5+ 17. Kd3 Qf5+ 18. Kd2 Qxf3 19. gxf3 Bf5 20. Rae1+ Kd7 21. Re5 Bg6 22. Rhe1 Nc6 23. Rb5 Rhe8 24. Rd5+ 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2007.05.29"]
[Round "3"]
[White "Schenkelaars, Vincent"]
[Black "Aalbers, Klaas"]
[Result "1/2-1/2"]
[ECO "A84"]
[WhiteElo "1763"]
[BlackElo "1827"]
[PlyCount "54"]
[EventDate "2007.05.15"]
[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 d5 2. c4 e6 3. Nc3 f5 4. Nf3 Nf6 5. Bf4 c6 6. e3 Bd6 7. Bxd6 Qxd6 8. Ne5 0-0 9. f4 Nbd7 10. c5 Qe7 11. Be2 Ne4 12. Nxe4 fxe4 13. 0-0 Nxe5 14. fxe5 Bd7 15. Qd2 Qg5 16. b4 h5 17. Rxf8+ Rxf8 18. Rf1 Rxf1+ 19. Bxf1 h4 20. Qf2 Be8 21. a4 a6 22. Be2 Bh5 23. Kf1 Bxe2+ 24. Kxe2 Qg4+ 25. Ke1 g5 26. Qe2 Qxe2+ 27. Kxe2 Kg7 1/2-1/2

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2007.05.22"]
[Round "2"]
[White "Aalbers, Klaas"]
[Black "Loomans, Nico"]
[Result "1-0"]
[ECO "C37"]
[WhiteElo "1827"]
[BlackElo "1507"]
[PlyCount "55"]
[EventDate "2007.05.15"]
[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. f4 exf4 3. Nf3 g5 4. d4 d5 5. exd5 Qxd5 6. Nc3 Qd8 7. Bc4 Bg7 8. 0-0 h6 9. Re1+ Kf8 10. b3 Bg4 11. Ba3+ Ne7 12. Bxe7+ Qxe7 13. Rxe7 Kxe7 14. Qe2+ Kf8 15. Rd1 Nc6 16. Nb5 Re8 17. Qf1 Re7 18. c3 a6 19. Na3 Re3 20. Rd3 Re7 21. Nb1 Bf5 22. Rd1 Kg8 23. Bd3 Bg4 24. Re1 Rd7 25. Re8+ Bf8 26. Be4 Nd8 27. Ne5 Rd6 28. Nxg4 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2007.05.15"]
[Round "1"]
[White "Wantola, Ivo"]
[Black "Aalbers, Klaas"]
[Result "1-0"]
[ECO "A84"]
[WhiteElo "2184"]
[BlackElo "1827"]
[PlyCount "67"]
[EventDate "2007.05.15"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 e6 3. c4 c6 4. Qc2 f5 5. Bf4 Nf6 6. e3 Bd6 7. Bxd6 Qxd6 8. c5 Qe7 9. Ne5 Nbd7 10. Nxd7 Bxd7 11. Nd2 e5 12. dxe5 Qxe5 13. Be2 0-0 14. 0-0 Rae8 15. Bd3 Ne4 16. f4 Qe7 17. Bxe4 fxe4 18. Nb3 Rf6 19. Nd4 Ref8 20. Rf2 g5 21. Raf1 gxf4 22. Rxf4 Rxf4 23. Rxf4 Rxf4 24. exf4 Qf6 25. Qf2 b6 26. b4 bxc5 27. bxc5 Qf8 28. Qh4 Bf5 29. Qg5+ Bg6 30. Ne6 Qb8 31. Qf6 Qb1+ 32. Kf2 e3+ 33. Kg3 Qf1 34. Kh3 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2006.06.27"]
[Round "7"]
[White "Aalbers, Klaas"]
[Black "Schenkelaars, Vincent"]
[Result "1-0"]
[ECO "A43"]
[WhiteElo "1793"]
[BlackElo "1777"]
[PlyCount "50"]
[EventDate "2006.05.16"]
[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 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 c5 6. d5 0-0 7. Bd3 a6 8. a4 Qb6 9. a5 Qc7 10. Qe2 e6 11. 0-0 Re8 12. Bc4 exd5 13. Nxd5 Nxd5 14. Bxd5 Nc6 15. Qc4 Re7 16. f5 gxf5 17. Ng5 Ne5 18. Qa2 h6 19. exf5 Ng4 20. Ne4 Bd4+ 21. Kh1 Kh7 22. f6 Re8 23. c3 Be3 24. Qb1 Kg8 25. Ng5 Be6 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2006.06.20"]
[Round "6"]
[White "Zwaan, Gert Jan"]
[Black "Aalbers, Klaas"]
[Result "0-1"]
[ECO "C40"]
[WhiteElo "1516"]
[BlackElo "1793"]
[PlyCount "72"]
[EventDate "2006.05.16"]
[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. Nf3 f5 3. exf5 Bc5 4. Bc4 d5 5. Bb3 Nc6 6. Qe2 e4 7. d3 Bxf5 8. Bg5 Be7 9. Bxe7 Qxe7 10. Bxd5 exf3 11. Qxe7+ Ngxe7 12. Bxf3 Nd4 13. Na3 Nxf3+ 14. gxf3 Nc6 15. 0-0-0 0-0-0 16. Kb1 Rhe8 17. Nc4 Re2 18. Ne3 Bg6 19. Rhf1 Rf8 20. Rde1 Rxe1+ 21. Rxe1 Rxf3 22. Rf1 Nd4 23. Nd5 Nc6 24. a3 Rxd3 25. Nf4 Rd2 26. Nxg6 hxg6 27. c3 Re2 28. h4 Re6 29. Rg1 Rf6 30. Rg2 Ne5 31. Kc2 Kd7 32. Kd2 Nf3+ 33. Ke3 Nxh4 34. Rh2 Nf5+ 35. Ke2 Rd6 36. b4 Ra6 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2006.06.13"]
[Round "5"]
[White "Van der Marel, Eric J"]
[Black "Aalbers, Klaas"]
[Result "1-0"]
[ECO "A84"]
[WhiteElo "1986"]
[BlackElo "1793"]
[PlyCount "77"]
[EventDate "2006.05.16"]
[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 d5 2. c4 c6 3. Nf3 e6 4. Nc3 f5 5. Bf4 Nf6 6. e3 Bd6 7. Ne5 0-0 8. Bd3 Bxe5 9. Bxe5 Nbd7 10. cxd5 exd5 11. Bd6 Re8 12. Bxf5 Nb6 13. Bxc8 Rxc8 14. Bf4 Nc4 15. Qe2 Ne4 16. Nxe4 Rxe4 17. 0-0 Qf6 18. b3 Qxf4 19. bxc4 dxc4 20. Qxc4+ Qf7 21. Qxf7+ Kxf7 22. Rab1 Re7 23. Rfc1 Rec7 24. Rb3 Ke6 25. f3 Kd6 26. e4 Rf8 27. Kf2 Rff7 28. Ke3 b6 29. Rbc3 Rf8 30. a4 Rb8 31. f4 Rbc8 32. g4 a6 33. e5+ Kd5 34. a5 c5 35. dxc5 bxc5 36. Rd3+ Kc6 37. Rd6+ Kb5 38. Rb6+ Kxa5 39. Rb2 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2006.06.06"]
[Round "4"]
[White "Aalbers, Klaas"]
[Black "Volders, Wessel"]
[Result "1/2-1/2"]
[ECO "B21"]
[WhiteElo "1793"]
[BlackElo "1899"]
[PlyCount "18"]
[EventDate "2006.05.16"]
[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. d4 cxd4 3. c3 d3 4. Bxd3 d6 5. h3 Nc6 6. Nf3 Nf6 7. 0-0 e6 8. Qe2 Qc7 9. Rd1 Be7 1/2-1/2

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2006.05.30"]
[Round "3"]
[White "Geertsma, Folkert Jan"]
[Black "Aalbers, Klaas"]
[Result "1/2-1/2"]
[ECO "D10"]
[WhiteElo "1858"]
[BlackElo "1793"]
[PlyCount "27"]
[EventDate "2006.05.16"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. c4 c6 2. d4 d5 3. cxd5 cxd5 4. Nc3 e6 5. Bf4 a6 6. a3 f5 7. e3 Nf6 8. Nf3 Bd6 9. Bxd6 Qxd6 10. Ne5 Bd7 11. Be2 0-0 12. f4 Qe7 13. 0-0 Nc6 14. Rc1 1/2-1/2

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2006.05.23"]
[Round "2"]
[White "Aalbers, Klaas"]
[Black "Roosendaal, Chris"]
[Result "0-1"]
[ECO "C01"]
[WhiteElo "1793"]
[BlackElo "2158"]
[PlyCount "96"]
[EventDate "2006.05.16"]
[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. Be3 dxe4 4. f3 Nf6 5. Nd2 Nd5 6. Qe2 c5 7. c3 Nxe3 8. Qxe3 cxd4 9. cxd4 Nc6 10. Bb5 Bb4 11. fxe4 Bxd2+ 12. Qxd2 Qh4+ 13. Qf2 Qxe4+ 14. Ne2 0-0 15. Bxc6 bxc6 16. 0-0 Ba6 17. Rfe1 Rfd8 18. Rad1 Bxe2 19. Rxe2 Qd5 20. b3 Rab8 21. Red2 Rb4 22. Qe3 a5 23. Qc3 h6 24. Rd3 Rdb8 25. Rc1 a4 26. Qxc6 Qxc6 27. Rxc6 axb3 28. axb3 Rxb3 29. Rxb3 Rxb3 30. Kf2 g5 31. Rc2 Rd3 32. Rc4 Kg7 33. Ke2 Ra3 34. Rc2 Kg6 35. Rd2 Ra5 36. Ke3 f5 37. Kf3 Kf6 38. Ke3 Ra3+ 39. Kf2 Ke7 40. Ke2 f4 41. Kf2 g4 42. Ke2 h5 43. Kf2 h4 44. Ke2 Kd6 45. Kf2 Kd5 46. Re2 g3+ 47. hxg3 hxg3+ 48. Ke1 Ra1+ 0-1

[Event "Leiden SB-chB"]
[Site "Leiden"]
[Date "2004.07.07"]
[Round "7"]
[White "De Bode, Christian"]
[Black "Aalbers, Klaas"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "1826"]
[BlackElo "1780"]
[PlyCount "107"]
[EventDate "2004.05.19"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. g3 d5 2. Bg2 c6 3. d3 e6 4. Nd2 f5 5. e4 Bd6 6. exf5 exf5 7. f4 Nf6 8. Qe2+ Qe7 9. Qxe7+ Kxe7 10. Ngf3 Re8 11. 0-0 Kf8 12. Nb3 Nbd7 13. Bd2 Bc7 14. Rfe1 Bb6+ 15. Kf1 a5 16. Rxe8+ Kxe8 17. Re1+ Kf8 18. Nbd4 Bxd4 19. Nxd4 g6 20. Ne6+ Kg8 21. Bc3 b5 22. Nd8 c5 23. Re6 Ra6 24. Rxa6 Bxa6 25. Bxa5 b4 26. a3 bxa3 27. bxa3 Kf8 28. Ne6+ Ke7 29. Nc7 Bb7 30. c4 Kd6 31. cxd5 Bxd5 32. Nxd5 Nxd5 33. Ke2 N5b6 34. h3 c4 35. Bb4+ Ke6 36. dxc4 Nxc4 37. Kd3 Ncb6 38. Kd4 Kf6 39. Bc6 g5 40. a4 Nb8 41. Bb5 gxf4 42. gxf4 Ke6 43. a5 Nd5 44. Bc4 Nc6+ 45. Kc5 Ncxb4 46. h4 h5 47. Be2 Nxf4 48. Kxb4 Kd6 49. Bf3 Kc7 50. Kb5 Ne6 51. Bd5 Nf8 52. a6 Kb8 53. Kc6 Ng6 54. Kb6 1-0

[Event "Leiden SB-chB"]
[Site "Leiden"]
[Date "2004.06.23"]
[Round "5"]
[White "Frijling, Jeroen"]
[Black "Aalbers, Klaas"]
[Result "1/2-1/2"]
[ECO "A51"]
[WhiteElo "1813"]
[BlackElo "1780"]
[PlyCount "64"]
[EventDate "2004.05.19"]
[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 Nf6 2. c4 e5 3. dxe5 Ne4 4. Qc2 Bb4+ 5. Nc3 d5 6. exd6 Bxc3+ 7. bxc3 Bf5 8. Qb3 Qf6 9. Nf3 cxd6 10. Bb2 Qe7 11. e3 0-0 12. Be2 Bg4 13. Rd1 Nc6 14. 0-0 Rac8 15. Rfe1 Nc5 16. Qc2 Bh5 17. Qf5 Bg6 18. Qf4 Rcd8 19. h4 Ne5 20. Nxe5 dxe5 21. Qg4 f5 22. Qh3 Rxd1 23. Rxd1 f4 24. Ba3 Bf5 25. Qf3 b6 26. Bxc5 bxc5 27. exf4 exf4 28. Bd3 Be6 29. Qh5 g6 30. Bxg6 hxg6 31. Qxg6+ Kh8 32. Qh6+ Kg8 1/2-1/2

[Event "Leiden SB-chB"]
[Site "Leiden"]
[Date "2004.06.09"]
[Round "6"]
[White "Aalbers, Klaas"]
[Black "Beck, Marc"]
[Result "1-0"]
[ECO "C01"]
[WhiteElo "1780"]
[PlyCount "81"]
[EventDate "2004.05.19"]
[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 e6 2. d4 d5 3. Be3 dxe4 4. f3 Nf6 5. Nd2 Nd5 6. Qe2 Nxe3 7. Qxe3 Nc6 8. c3 exf3 9. Ngxf3 b6 10. Bd3 Bb7 11. 0-0 Qd7 12. Ng5 Be7 13. Nxf7 Rf8 14. Ne5 Rxf1+ 15. Rxf1 Nxe5 16. Qxe5 Bd6 17. Qh5+ g6 18. Qh4 Qe7 19. Qf2 0-0-0 20. Be4 Ba6 21. Re1 Rf8 22. Nf3 Kb8 23. Qc2 Qf7 24. Qa4 Bb7 25. Bxb7 Kxb7 26. Qc4 Qf5 27. Qxe6 Qh5 28. Qe4+ Ka6 29. Qe2+ Kb7 30. b4 g5 31. b5 g4 32. Qe4+ Kb8 33. Ne5 Bxe5 34. Qxe5 Qf7 35. Qe2 h5 36. a4 Kc8 37. Qe6+ Qxe6 38. Rxe6 Rf5 39. Re7 Kb7 40. Re5 Rxe5 41. dxe5 1-0

[Event "Leiden SB-chB"]
[Site "Leiden"]
[Date "2004.06.09"]
[Round "4"]
[White "Aalbers, Klaas"]
[Black "Gorter, Yme"]
[Result "1-0"]
[ECO "C30"]
[WhiteElo "1780"]
[BlackElo "1774"]
[PlyCount "61"]
[EventDate "2004.05.19"]
[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. f4 Bc5 3. Nf3 d6 4. Nc3 Nf6 5. Bc4 Ng4 6. Ng5 h6 7. Nxf7 Qh4+ 8. g3 Qh3 9. Qe2 Bf2+ 10. Kd1 Bxg3 11. Rf1 Nxh2 12. f5 Rf8 13. Rg1 Ng4 14. Qf3 Nf2+ 15. Ke2 Bh4 16. Qxh3 Nxh3 17. Rxg7 Bf6 18. Rh7 Nf4+ 19. Kf3 Nc6 20. Nb5 Rg8 21. Nfxd6+ cxd6 22. Bxg8 Kf8 23. Bb3 Bg7 24. f6 Bxf6 25. Rf7+ Ke8 26. Rxf6 a6 27. Nc7+ Ke7 28. Rf7+ Kd8 29. Nxa8 Nd4+ 30. Ke3 Ng2+ 31. Kf2 1-0

[Event "Leiden SB-chB"]
[Site "Leiden"]
[Date "2004.06.02"]
[Round "3"]
[White "Anink, Marco"]
[Black "Aalbers, Klaas"]
[Result "0-1"]
[ECO "A84"]
[WhiteElo "1890"]
[BlackElo "1780"]
[PlyCount "58"]
[EventDate "2004.05.19"]
[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 d5 2. c4 c6 3. Nf3 e6 4. e3 f5 5. Ne5 Nf6 6. g4 Bd6 7. g5 Bxe5 8. dxe5 Ne4 9. Rg1 Nd7 10. cxd5 Nxe5 11. f4 Ng6 12. dxc6 Qb6 13. Bc4 Qb4+ 14. Nd2 Nxd2 15. Bxd2 Qxc4 16. Rc1 Qe4 17. Qb3 bxc6 18. Kf2 0-0 19. Rc4 Qd5 20. Bb4 Ba6 21. Rc3 Qxb3 22. axb3 Rfc8 23. Rd1 Bb5 24. Rc5 Rd8 25. Rcc1 Rd5 26. Ba5 Rb8 27. b4 Rb7 28. e4 fxe4 29. Rxd5 exd5 0-1

[Event "Leiden SB-chB"]
[Site "Leiden"]
[Date "2004.05.26"]
[Round "2"]
[White "Aalbers, Klaas"]
[Black "Kettenis, John"]
[Result "1-0"]
[ECO "B21"]
[WhiteElo "1780"]
[BlackElo "1556"]
[PlyCount "57"]
[EventDate "2004.05.19"]
[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. d4 cxd4 3. c3 d5 4. Qxd4 e6 5. exd5 Qxd5 6. Qxd5 exd5 7. Nf3 Nf6 8. Bd3 Be7 9. 0-0 0-0 10. h3 h6 11. Be3 Ne4 12. c4 Be6 13. Nd4 Nc5 14. Nxe6 fxe6 15. Bxc5 Bxc5 16. cxd5 exd5 17. Nc3 Rd8 18. Nxd5 Nc6 19. Bc4 Kf8 20. Nc7 Nd4 21. Nxa8 Rxa8 22. Rac1 b5 23. Bxb5 Nxb5 24. Rxc5 Nd4 25. Re1 Rb8 26. b3 Rb7 27. Re4 Rd7 28. Rc8+ Kf7 29. Rxd4 1-0

[Event "Leiden SB-chB"]
[Site "Leiden"]
[Date "2004.05.19"]
[Round "1"]
[White "Lim, Danny"]
[Black "Aalbers, Klaas"]
[Result "0-1"]
[ECO "C50"]
[WhiteElo "1507"]
[BlackElo "1780"]
[PlyCount "70"]
[EventDate "2004.05.19"]
[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. Bc4 Nc6 3. Nf3 f5 4. d3 Nf6 5. Ng5 d5 6. exd5 Nxd5 7. a3 Be7 8. Nf3 Be6 9. 0-0 Bf7 10. Nc3 0-0 11. Nxd5 Bxd5 12. Bxd5+ Qxd5 13. Re1 Rad8 14. Bg5 Rfe8 15. Bxe7 Rxe7 16. Nh4 Qf7 17. Qf3 Nd4 18. Qd1 e4 19. dxe4 fxe4 20. Kh1 Qf6 21. c3 Nc6 22. Qg4 Rf8 23. Rxe4 Rxe4 24. Qxe4 Qxf2 25. Qc4+ Kh8 26. Nf3 Qxb2 27. Re1 Qxa3 28. Qe6 Qxc3 29. Ng5 h6 30. Nf7+ Rxf7 31. Qe8+ Kh7 32. Qe4+ g6 33. h4 Re7 34. Qxe7+ Nxe7 35. Rxe7+ Kg8 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2003.07.01"]
[Round "7"]
[White "Bakker, Sven"]
[Black "Aalbers, Klaas"]
[Result "1-0"]
[ECO "A84"]
[WhiteElo "2243"]
[BlackElo "1753"]
[PlyCount "57"]
[EventDate "2003.05.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 095 Extra"]
[Source "ChessBase"]
[SourceDate "2003.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2003.09.04"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 e6 4. cxd5 exd5 5. Nc3 f5 6. Bf4 Nf6 7. e3 Bd6 8. Bg3 0-0 9. Bd3 Ne4 10. Qc2 Qf6 11. 0-0-0 b5 12. Kb1 a5 13. Be5 Qe7 14. Bxd6 Qxd6 15. Ne5 a4 16. f4 b4 17. Nxa4 Rxa4 18. Qxa4 Nf2 19. Rhf1 Nxd1 20. Rxd1 Bd7 21. Qa7 Be6 22. Rc1 Re8 23. h3 g6 24. g4 fxg4 25. hxg4 Qe7 26. Qa5 Qh4 27. f5 Bf7 28. Rf1 g5 29. Qc7 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2003.06.24"]
[Round "6"]
[White "Van Baardewijk, Frans"]
[Black "Aalbers, Klaas"]
[Result "0-1"]
[ECO "A51"]
[WhiteElo "1690"]
[BlackElo "1753"]
[PlyCount "122"]
[EventDate "2003.05.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 095 Extra"]
[Source "ChessBase"]
[SourceDate "2003.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2003.09.04"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e5 3. dxe5 Ne4 4. Nd2 Bb4 5. a3 Bxd2+ 6. Bxd2 Nc6 7. Nf3 Qe7 8. Bf4 g5 9. Bg3 h5 10. Qd5 Nxg3 11. hxg3 b6 12. Nd4 Bb7 13. Nxc6 dxc6 14. Qd4 c5 15. Qc3 0-0-0 16. Rd1 Rxd1+ 17. Kxd1 Rd8+ 18. Kc1 h4 19. gxh4 gxh4 20. Rh3 Bxg2 21. Bxg2 Qg5+ 22. Kc2 Qxg2 23. Qf3 Qg6+ 24. Kc3 Rd4 25. Qa8+ Kd7 26. Rd3 Qg4 27. Qf8 Rxd3+ 28. exd3 Qd4+ 29. Kc2 Qxf2+ 30. Kb3 Qf5 31. Kc2 h3 32. Qg7 h2 33. Qg2 Qxe5 34. Qh3+ Kd6 35. Qh6+ f6 36. Kb3 Kc6 37. Qh3 Kb7 38. Qg2+ c6 39. Qg7+ Qc7 40. Qh8 Qg3 41. Qh7+ Kc8 42. Qf5+ Kc7 43. Qe4 Kd6 44. Ka2 f5 45. Qe8 f4 46. Qd8+ Ke5 47. Qh8+ Kf5 48. Qh5+ Ke6 49. Qh6+ Kd7 50. Qh7+ Kc8 51. Qe4 Kd8 52. Qxc6 f3 53. Qd5+ Ke8 54. Qh5+ Ke7 55. Qh7+ Ke6 56. Qh6+ Kf5 57. Qh5+ Kf4 58. Qh6+ Kg4 59. Qe6+ Kh4 60. Qh6+ Kg4 61. Qe6+ Kh5 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2003.06.17"]
[Round "5"]
[White "Aalbers, Klaas"]
[Black "Gorter, Yme"]
[Result "0-1"]
[ECO "C30"]
[WhiteElo "1753"]
[BlackElo "1781"]
[PlyCount "60"]
[EventDate "2003.05.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 095 Extra"]
[Source "ChessBase"]
[SourceDate "2003.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2003.09.04"]
[SourceQuality "1"]

1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. d4 exd4 5. Bd3 Nc6 6. 0-0 Bg4 7. h3 Bxf3 8. Qxf3 Qd7 9. a3 Nf6 10. b4 Bb6 11. b5 Ne7 12. e5 Nfd5 13. Kh2 0-0 14. g4 dxe5 15. fxe5 Ng6 16. Bf5 Qxb5 17. a4 Qc6 18. Qe4 Rae8 19. Bxg6 fxg6 20. Rxf8+ Rxf8 21. Na3 Rf2+ 22. Kg3 d3 23. cxd3 Nc3 24. Qxc6 Ne2+ 25. Kh4 bxc6 26. Nc4 Bd4 27. Rb1 h6 28. g5 Nxc1 29. Rxc1 Rg2 30. Rf1 hxg5# 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2003.06.10"]
[Round "4"]
[White "Siero, Paul"]
[Black "Aalbers, Klaas"]
[Result "0-1"]
[ECO "C40"]
[WhiteElo "1150"]
[BlackElo "1753"]
[PlyCount "64"]
[EventDate "2003.05.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 095 Extra"]
[Source "ChessBase"]
[SourceDate "2003.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2003.09.04"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 f5 3. Nxe5 Qf6 4. d4 d6 5. Nc4 fxe4 6. Nc3 Qg6 7. Bf4 Nf6 8. g3 Be7 9. Qd2 0-0 10. 0-0-0 Nh5 11. Bg2 Nxf4 12. Bxe4 Qh6 13. gxf4 Qxf4 14. f3 c6 15. d5 c5 16. Rdg1 Bd7 17. Kb1 b5 18. Qg2 Bf6 19. Qg3 Qxg3 20. hxg3 bxc4 21. Bxh7+ Kf7 22. f4 Bxc3 23. bxc3 Na6 24. Re1 Rae8 25. Be4 Re7 26. f5 Rfe8 27. Rh4 Kf6 28. Rf4 Nc7 29. Rg4 Bxf5 30. Rf1 Rxe4 31. Rxe4 Rxe4 32. Rg1 Nxd5 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2003.06.03"]
[Round "3"]
[White "Aalbers, Klaas"]
[Black "Bey, Jan"]
[Result "0-1"]
[ECO "B21"]
[WhiteElo "1753"]
[BlackElo "1855"]
[PlyCount "50"]
[EventDate "2003.05.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 095 Extra"]
[Source "ChessBase"]
[SourceDate "2003.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2003.09.04"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 e6 5. Nf3 Bb4 6. Bd3 Nc6 7. 0-0 Nge7 8. Qe2 a6 9. Rd1 Qa5 10. Bd2 Qh5 11. Rac1 b5 12. a3 Ba5 13. b4 Bb6 14. Be3 Bxe3 15. Qxe3 0-0 16. Be2 Qg6 17. Rd6 f5 18. Nd5 fxe4 19. Nxe7+ Nxe7 20. Ne5 Qf6 21. Ng4 Qb2 22. Rdd1 d5 23. Rb1 Qa2 24. Ra1 d4 25. Qxd4 Qxe2 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2003.05.27"]
[Round "2"]
[White "De Ruyter, Wim"]
[Black "Aalbers, Klaas"]
[Result "0-1"]
[ECO "C40"]
[WhiteElo "1538"]
[BlackElo "1753"]
[PlyCount "40"]
[EventDate "2003.05.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 095 Extra"]
[Source "ChessBase"]
[SourceDate "2003.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2003.09.04"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 f5 3. Nxe5 Qf6 4. d4 d6 5. Nf3 fxe4 6. Ng5 d5 7. c4 c6 8. Nc3 Bb4 9. cxd5 cxd5 10. a3 Bxc3+ 11. bxc3 Ne7 12. c4 0-0 13. f4 exf3 14. Nxf3 Bg4 15. Be2 Nbc6 16. 0-0 Bxf3 17. Bxf3 Qxd4+ 18. Qxd4 Nxd4 19. Bxd5+ Nxd5 20. cxd5 Ne2+ 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2003.05.20"]
[Round "1"]
[White "Aalbers, Klaas"]
[Black "Devine, Christopher"]
[Result "0-1"]
[ECO "A43"]
[WhiteElo "1753"]
[BlackElo "1938"]
[PlyCount "92"]
[EventDate "2003.05.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 095 Extra"]
[Source "ChessBase"]
[SourceDate "2003.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2003.09.04"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 c5 6. d5 0-0 7. Be2 b5 8. e5 dxe5 9. fxe5 Ng4 10. Bf4 Nd7 11. Bxb5 Ngxe5 12. 0-0 Qb6 13. Bxd7 Nxf3+ 14. Qxf3 Bxd7 15. Rab1 e5 16. dxe6 fxe6 17. Qd1 Bd4+ 18. Kh1 Bc6 19. Bh6 Rf5 20. Qe2 Qb7 21. Rbe1 Re8 22. Rxf5 exf5 23. Qc4+ Kh8 24. Rxe8+ Bxe8 25. Bc1 Bc6 26. Qe2 f4 27. Bxf4 Bxc3 28. Be5+ Bxe5 29. Qxe5+ Kg8 30. Qe6+ Qf7 31. Qxf7+ Kxf7 32. Kg1 Ke6 33. Kf2 Ke5 34. c3 a5 35. g3 Ke4 36. Ke2 Bb5+ 37. Kd2 Kf3 38. a3 c4 39. Ke1 Kg2 40. Ke2 Kxh2 41. Kf2 Bc6 42. a4 h5 43. Ke3 Kxg3 44. Kd4 h4 45. Kxc4 h3 46. Kc5 Bxa4 0-1

[Event "a1-h8 Winners 21 email"]
[Site "a1h8 email"]
[Date "2001.09.24"]
[Round "?"]
[White "Anderson, Michael"]
[Black "Aalbers, Klaas"]
[Result "0-1"]
[ECO "A04"]
[PlyCount "44"]
[EventDate "2001.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[SourceTitle "Corr 2004"]
[Source "ChessBase"]
[SourceDate "2003.04.28"]
[SourceVersion "3"]
[SourceVersionDate "2003.04.28"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 f5 3. d3 Nc6 4. Nc3 Nf6 5. Bg5 Be7 6. Be2 0-0 7. 0-0 d6 8. Re1 Be6 9. Bxf6 Bxf6 10. h3 f4 11. Nd5 a6 12. Nxf6+ Qxf6 13. c3 Rad8 14. Qc2 Kh8 15. a4 g5 16. b4 Rg8 17. b5 Nb8 18. c4 h5 19. Nh2 g4 20. hxg4 hxg4 21. g3 Rdf8 22. Qd1 fxg3 0-1

[Event "a1-h8 Winners 21 email"]
[Site "a1h8 email"]
[Date "2001.09.17"]
[Round "?"]
[White "Aalbers, Klaas"]
[Black "Kruis, Rob P"]
[Result "0-1"]
[ECO "B21"]
[PlyCount "54"]
[EventDate "2001.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[SourceTitle "Corr 2004"]
[Source "ChessBase"]
[SourceDate "2003.04.28"]
[SourceVersion "3"]
[SourceVersionDate "2003.04.28"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 a6 7. 0-0 Nge7 8. Qe2 Ng6 9. Rd1 Be7 10. Be3 b5 11. Bb3 0-0 12. Rac1 Bb7 13. h3 Na5 14. Bc2 Nc4 15. b3 Nxe3 16. Qxe3 Ba3 17. Rb1 Rc8 18. Ne1 Bb4 19. Nxb5 axb5 20. Bd3 Bc5 21. Qe2 Nf4 22. Qf1 Qg5 23. Nf3 Qg3 24. Rb2 Nxh3+ 25. Kh1 Nxf2+ 26. Rxf2 Bxf2 27. Bb1 Rc5 0-1

[Event "a1-h8 Winners 21 email"]
[Site "a1h8 email"]
[Date "2001.09.16"]
[Round "?"]
[White "Aalbers, Klaas"]
[Black "Buijck, Frank"]
[Result "0-1"]
[ECO "C32"]
[PlyCount "58"]
[EventDate "2001.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[SourceTitle "Corr 2004"]
[Source "ChessBase"]
[SourceDate "2003.04.28"]
[SourceVersion "3"]
[SourceVersionDate "2003.04.28"]
[SourceQuality "1"]

1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. Nc3 Bb4 6. Bd2 0-0 7. Nxe4 Re8 8. Be2 Nxe4 9. Bxb4 Qh4+ 10. g3 Nxg3 11. Nf3 Qxf4 12. hxg3 Qxf3 13. Rf1 Qxg3+ 14. Kd2 Qe3+ 15. Kc3 Qxe2 16. Qxe2 Rxe2 17. Rae1 Rxe1 18. Rxe1 Bd7 19. Re7 g5 20. d6 c6 21. Kd4 Kg7 22. Ke4 h5 23. Bc3+ Kg6 24. d4 f5+ 25. Kf3 h4 26. d5 cxd5 27. b3 a6 28. Ba5 Nc6 29. Rxd7 Ne5+ 0-1

[Event "a1-h8 Winners 21 email"]
[Site "a1h8 email"]
[Date "2001.09.12"]
[Round "?"]
[White "Buijck, Frank"]
[Black "Aalbers, Klaas"]
[Result "1-0"]
[ECO "C40"]
[PlyCount "51"]
[EventDate "2001.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[SourceTitle "Corr 2004"]
[Source "ChessBase"]
[SourceDate "2003.04.28"]
[SourceVersion "3"]
[SourceVersionDate "2003.04.28"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 f5 3. exf5 Bc5 4. Nxe5 Bxf2+ 5. Kxf2 Qh4+ 6. Kf3 Nf6 7. Qe2 0-0 8. Qc4+ Qxc4 9. Bxc4+ d5 10. Bb3 Bxf5 11. Re1 Nbd7 12. d4 c6 13. c4 Nb6 14. cxd5 Nfxd5 15. Kg3 Bxb1 16. Rxb1 Rae8 17. Bd2 Kh8 18. Nf7+ Kg8 19. Nd6 Rb8 20. Re6 Kh8 21. Rbe1 h5 22. R1e5 Nf6 23. Rxf6 gxf6 24. Rxh5+ Kg7 25. Nf5+ Kg6 26. Ne7+ 1-0

[Event "a1-h8 Winners 21 email"]
[Site "a1h8 email"]
[Date "2001.09.08"]
[Round "?"]
[White "Kruis, Rob P"]
[Black "Aalbers, Klaas"]
[Result "1-0"]
[ECO "C40"]
[PlyCount "33"]
[EventDate "2001.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[SourceTitle "Corr 2004"]
[Source "ChessBase"]
[SourceDate "2003.04.28"]
[SourceVersion "3"]
[SourceVersionDate "2003.04.28"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 f5 3. Nxe5 Qf6 4. d4 d6 5. Nc4 fxe4 6. Nc3 Qg6 7. f3 Nf6 8. fxe4 Bg4 9. Be2 Be7 10. 0-0 0-0 11. Ne3 Bxe2 12. Qxe2 Nc6 13. Nf5 Rae8 14. Qb5 Rb8 15. Qxc6 Qxf5 16. Qc4+ d5 17. Nxd5 1-0

[Event "a1-h8 Winners 21 email"]
[Site "a1h8 email"]
[Date "2001.09.04"]
[Round "?"]
[White "Aalbers, Klaas"]
[Black "Anderson, Michael"]
[Result "1-0"]
[ECO "C30"]
[PlyCount "31"]
[EventDate "2001.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[SourceTitle "Corr 2004"]
[Source "ChessBase"]
[SourceDate "2003.04.28"]
[SourceVersion "3"]
[SourceVersionDate "2003.04.28"]
[SourceQuality "1"]

1. e4 e5 2. f4 f6 3. Bc4 Nc6 4. Nf3 d6 5. 0-0 Bg4 6. c3 Qe7 7. f5 0-0-0 8. Qa4 a6 9. Bxa6 bxa6 10. Qxc6 Bxf3 11. Rxf3 Nh6 12. Qxa6+ Kd7 13. Qb5+ Kc8 14. c4 c5 15. Rb3 Qc7 16. Qa6+ 1-0

