[Event "Leiden SB-chA"]
[Site "Leiden"]
[Date "2015.06.30"]
[Round "7"]
[White "Senders, Justin"]
[Black "Aalders, Peter"]
[Result "1-0"]
[ECO "C02"]
[WhiteElo "1937"]
[BlackElo "1907"]
[PlyCount "83"]
[EventDate "2015.05.19"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. Bd3 cxd4 7. cxd4 Bd7 8. 0-0 Nxd4 9. Nxd4 Qxd4 10. Qe2 Ne7 11. Nc3 a6 12. Kh1 Nc6 13. Be3 Qh4 14. f4 Qd8 15. Bg1 Be7 16. Rae1 g6 17. a3 0-0 18. f5 exf5 19. Nxd5 Be6 20. Nf4 b5 21. b4 Qc7 22. Nxe6 fxe6 23. Qa2 Rfe8 24. Qxe6+ Kg7 25. Rc1 Rac8 26. Qb3 Bg5 27. Rc5 Qd7 28. Qc3 Qe6 29. Bc2 Nxe5 30. Bb3 Rxc5 31. bxc5 Qe7 32. Bd4 Bf6 33. Re1 Qc7 34. c6 Re7 35. Bd5 Re8 36. h3 Re7 37. Qc5 Kh6 38. Rd1 Kg7 39. Rc1 Kh6 40. Qb6 Kg7 41. Qxc7 Rxc7 42. Bb6 1-0

[Event "Leiden SB-chA"]
[Site "Leiden"]
[Date "2015.06.23"]
[Round "6"]
[White "Aalders, Peter"]
[Black "Geertsma, Folkert Jan"]
[Result "1/2-1/2"]
[ECO "E09"]
[WhiteElo "1907"]
[BlackElo "1968"]
[PlyCount "58"]
[EventDate "2015.05.19"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. g3 Be7 5. Bg2 0-0 6. 0-0 c6 7. Qc2 b6 8. Bf4 Bb7 9. Rd1 Nbd7 10. Nbd2 Rc8 11. e4 dxe4 12. Nxe4 Nxe4 13. Qxe4 Nf6 14. Qc2 Bd6 15. Bxd6 Qxd6 16. c5 Qc7 17. Rac1 b5 18. Ne5 Rcd8 19. a4 a6 20. axb5 axb5 21. Ra1 Ra8 22. b4 Nd5 23. Bxd5 exd5 24. Qc3 f6 25. Nd3 Rfe8 26. Re1 Kf7 27. Nf4 Rxa1 28. Qxa1 Rxe1+ 29. Qxe1 Bc8 1/2-1/2

[Event "Leiden SB-chA"]
[Site "Leiden"]
[Date "2015.06.16"]
[Round "5"]
[White "Erwich, Frans"]
[Black "Aalders, Peter"]
[Result "0-1"]
[ECO "C11"]
[WhiteElo "1949"]
[BlackElo "1907"]
[PlyCount "44"]
[EventDate "2015.05.19"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. Nce2 c5 6. c3 Nc6 7. f4 Qb6 8. Nf3 Be7 9. dxc5 Nxc5 10. Ned4 0-0 11. Be2 f6 12. 0-0 fxe5 13. fxe5 a5 14. b3 Qc7 15. Nb5 Qb8 16. c4 Nxe5 17. cxd5 exd5 18. Qxd5+ Nf7 19. Ng5 Qe5 20. Bc4 Qxa1 21. Rxf7 Be6 22. Nxe6 Qxc1+ 0-1

[Event "Leiden SB-chA"]
[Site "Leiden"]
[Date "2015.06.09"]
[Round "4"]
[White "Roozendaal, Marc"]
[Black "Aalders, Peter"]
[Result "1-0"]
[ECO "D10"]
[WhiteElo "1951"]
[BlackElo "1907"]
[PlyCount "70"]
[EventDate "2015.05.19"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Nc3 Nf6 5. Qb3 Nc6 6. e3 Bf5 7. Qxb7 Bd7 8. Nb5 Rc8 9. f3 e5 10. Kf2 exd4 11. exd4 Be7 12. Bf4 0-0 13. Bc7 Rxc7 14. Qxc7 Qxc7 15. Nxc7 Nxd4 16. Bd3 Rc8 17. Na6 Bb5 18. Bxb5 Nxb5 19. Re1 Bd6 20. a3 Nd4 21. Ne2 Rc2 22. Ke3 Nf5+ 23. Kd3 Rxb2 24. g4 Rb3+ 25. Nc3 d4 26. gxf5 Rxc3+ 27. Kxd4 Rxa3 28. Nc5 Rxf3 29. Ne4 Rxf5 30. Nxf6+ gxf6 31. Re8+ Kg7 32. h4 Bc5+ 33. Ke4 Re5+ 34. Rxe5 fxe5 35. Kxe5 Kg6 1-0

[Event "Leiden SB-chA"]
[Site "Leiden"]
[Date "2015.06.02"]
[Round "3"]
[White "Aalders, Peter"]
[Black "Spaans, Coenraad"]
[Result "0-1"]
[ECO "E08"]
[WhiteElo "1907"]
[BlackElo "1906"]
[PlyCount "53"]
[EventDate "2015.05.19"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. g3 d5 4. Nf3 Be7 5. Bg2 0-0 6. 0-0 Nbd7 7. Qc2 Ne4 8. Bf4 c6 9. Nfd2 Nxd2 10. Nxd2 Re8 11. cxd5 exd5 12. Bxd5 Nf6 13. Bg2 Qxd4 14. Rfd1 Qc5 15. Qxc5 Bxc5 16. Nb3 Bb6 17. e3 Be6 18. Nd4 Bd5 19. Nf5 Bxg2 20. Kxg2 Nd5 21. Nd6 Re6 22. Nxb7 g5 23. Bxg5 Rb8 24. Nd6 Rxd6 25. e4 Rg6 26. exd5 Rxg5 27. dxc6 0-1

[Event "Leiden SB-chA"]
[Site "Leiden"]
[Date "2015.05.26"]
[Round "2"]
[White "De Mooij, Marco"]
[Black "Aalders, Peter"]
[Result "1/2-1/2"]
[ECO "C14"]
[WhiteElo "1968"]
[BlackElo "1907"]
[PlyCount "121"]
[EventDate "2015.05.19"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. f4 a6 8. Bd3 Nb6 9. Nf3 c5 10. Qd2 Nc6 11. dxc5 Qxc5 12. 0-0-0 Bd7 13. Rhe1 Nc4 14. Bxc4 Qxc4 15. Ng5 Rd8 16. f5 d4 17. f6 dxc3 18. Qf2 g6 19. Ne4 Qxa2 20. Nd6+ Kf8 21. bxc3 Be8 22. Qc5 Kg8 23. Rd3 Qa5 24. Qe3 h6 25. Kb1 Qxe5 26. Qxe5 Nxe5 27. Rxe5 Kh7 28. Ree3 Rf8 29. Nc4 Bc6 30. g4 Bb5 31. Rxd8 Rxd8 32. Ne5 Rd1+ 33. Kb2 Rf1 34. Nxf7 Rxf6 35. Nd8 Bc6 36. Nxe6 g5 37. Nd4 Kg6 38. Nxc6 Rxc6 39. Kb3 h5 40. h3 hxg4 41. hxg4 Rf6 42. Re4 Rb6+ 43. Ka3 Kf6 44. c4 Re6 45. Rd4 Ke5 46. Rd7 Rb6 47. Rd3 Kf4 48. Rd4+ Kf3 49. Ka4 Rf6 50. Ka5 Rf4 51. c3 Rxg4 52. Rxg4 Kxg4 53. c5 Kf3 54. Kb6 a5 55. Kxb7 a4 56. c6 a3 57. c7 a2 58. c8Q a1Q 59. Qf5+ Ke2 60. Qe5+ Kf3 61. Qf5+ 1/2-1/2

[Event "Leiden SB-chA"]
[Site "Leiden"]
[Date "2015.05.19"]
[Round "1"]
[White "Aalders, Peter"]
[Black "Van 't Hof, Eric"]
[Result "0-1"]
[ECO "E11"]
[WhiteElo "1907"]
[BlackElo "2050"]
[PlyCount "88"]
[EventDate "2015.05.19"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. d4 e6 2. c4 Nf6 3. g3 d5 4. Nf3 Bb4+ 5. Bd2 a5 6. Bg2 0-0 7. 0-0 Nbd7 8. Qc2 c6 9. Bf4 Be7 10. Rd1 Ne4 11. Nbd2 f5 12. Ne5 Nxe5 13. Bxe5 Bd7 14. Nxe4 fxe4 15. f3 exf3 16. exf3 Be8 17. f4 Bg6 18. Qb3 Qd7 19. c5 a4 20. Qe3 b6 21. cxb6 Bd8 22. Bc7 Bxc7 23. bxc7 Rfe8 24. Qe5 Rac8 25. Rac1 Rxc7 26. Rc3 Rb7 27. Rdc1 Rxb2 28. Rxc6 Rb1 29. Rc7 Rxc1+ 30. Rxc1 Rc8 31. Rc5 Bf5 32. Bf3 Rxc5 33. dxc5 Qb5 34. g4 Qxc5+ 35. Kg2 Bg6 36. f5 exf5 37. Bxd5+ Kf8 38. gxf5 Bf7 39. Qb8+ Be8 40. Be6 Ke7 41. Qf4 Bc6+ 42. Kg3 Qd6 43. a3 Qxa3+ 44. Kh4 Qd6 0-1

[Event "Leiden SB-chA"]
[Site "Leiden"]
[Date "2014.06.10"]
[Round "5"]
[White "Aalders, Peter"]
[Black "Van der Zon, Stef"]
[Result "0-1"]
[ECO "E89"]
[WhiteElo "1884"]
[BlackElo "2168"]
[PlyCount "49"]
[EventDate "2014.05.13"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Be3 e5 7. Nge2 c6 8. Qd2 Nbd7 9. d5 cxd5 10. cxd5 Nb6 11. b3 Bd7 12. g4 h5 13. g5 Nh7 14. Nc1 f6 15. gxf6 Bxf6 16. Nd3 Bh4+ 17. Kd1 Ng5 18. Bxg5 Bxg5 19. Qg2 Rxf3 20. Be2 Rh3 21. Rg1 Bg4 22. Kc2 Rc8 23. Bxg4 hxg4 24. Qxg4 Qc7 25. Qxc8+ 0-1

[Event "Leiden SB-chA"]
[Site "Leiden"]
[Date "2014.06.03"]
[Round "4"]
[White "Pijpers, Arthur"]
[Black "Aalders, Peter"]
[Result "1-0"]
[ECO "C42"]
[WhiteElo "2383"]
[BlackElo "1884"]
[PlyCount "79"]
[EventDate "2014.05.13"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Nc6 7. 0-0 Be7 8. Re1 Bg4 9. c4 Nf6 10. Nc3 0-0 11. cxd5 Nxd5 12. Be4 Nf6 13. h3 Nxe4 14. hxg4 Nxc3 15. bxc3 Qd7 16. Rb1 Bd6 17. c4 Rfe8 18. c5 Rxe1+ 19. Qxe1 Bf8 20. Be3 b6 21. g5 Qd5 22. Qe2 Rd8 23. Qc2 g6 24. Rc1 b5 25. a4 a6 26. Qe2 Bg7 27. axb5 axb5 28. Qxb5 Rb8 29. Qd3 Ne5 30. Nxe5 Bxe5 31. Rd1 Rd8 32. Qe2 c6 33. Rd2 Bg7 34. Qf3 Qe6 35. g3 Qd5 36. Kg2 f5 37. gxf6 Bxf6 38. Qxd5+ cxd5 39. Ra2 Rb8 40. Ra7 1-0

[Event "Leiden SB-chA"]
[Site "Leiden"]
[Date "2014.05.27"]
[Round "3"]
[White "Aalders, Peter"]
[Black "Van Briemen, Willem Jan"]
[Result "1-0"]
[ECO "E01"]
[WhiteElo "1884"]
[BlackElo "2016"]
[PlyCount "95"]
[EventDate "2014.05.13"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 e6 3. Bg2 d5 4. 0-0 c5 5. d4 cxd4 6. Nxd4 Nc6 7. c4 Qb6 8. Nb3 dxc4 9. N3d2 Ne5 10. Nxc4 Nxc4 11. Qa4+ Bd7 12. Qxc4 Rc8 13. Qb3 Qxb3 14. axb3 Bc5 15. b4 Bb6 16. Bxb7 Rc2 17. Nc3 e5 18. Ba6 e4 19. Bc4 Be6 20. Bxe6 fxe6 21. Na4 0-0 22. Nxb6 axb6 23. Be3 Nd5 24. Bd4 Nxb4 25. Ra4 Nd5 26. e3 Rfc8 27. Be5 R2c4 28. Ra7 Nc7 29. Rd1 Ne8 30. Rdd7 R4c5 31. Bxg7 R5c7 32. Be5 Rxd7 33. Rxd7 Rc5 34. Bd4 Rb5 35. Re7 Nd6 36. Rxe6 Nc4 37. Rxe4 Nxb2 38. Bxb2 Rxb2 39. Re7 b5 40. Rb7 b4 41. Kg2 b3 42. Kf3 Rb1 43. h4 b2 44. Kf4 Kf8 45. Kf5 Ke8 46. Kf6 Kd8 47. e4 Kc8 48. Rb3 1-0

[Event "Leiden SB-chA"]
[Site "Leiden"]
[Date "2014.05.20"]
[Round "2"]
[White "Oei, Hway Ik"]
[Black "Aalders, Peter"]
[Result "1/2-1/2"]
[ECO "D17"]
[WhiteElo "2016"]
[BlackElo "1884"]
[PlyCount "128"]
[EventDate "2014.05.13"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 Nbd7 7. Nxc4 Qc7 8. Qd2 e5 9. dxe5 Ng4 10. e4 Be6 11. Nd6+ Bxd6 12. exd6 Qa5 13. Qg5 Qxg5 14. Bxg5 f6 15. Bf4 0-0-0 16. Be2 Nge5 17. b4 Ng6 18. Bg3 f5 19. exf5 Bxf5 20. 0-0 Rhe8 21. Rfe1 Nf6 22. Bf3 Bg4 23. Bxg4+ Nxg4 24. Rad1 Rxe1+ 25. Rxe1 Nf6 26. h3 Nh5 27. Bh2 Nhf4 28. Re4 Nd3 29. Rd4 Nde5 30. f4 Nf7 31. f5 Nf8 32. Ne4 b6 33. g4 Nd7 34. Kf2 Re8 35. Bf4 h6 36. Ng3 Kd8 37. Nh5 Rg8 38. Bg3 g6 39. Nf4 gxf5 40. gxf5 Nde5 41. Nh5 Nd7 42. Rg4 Rxg4 43. hxg4 Nde5 44. Bxe5 Nxe5 45. Nf6 Nd3+ 46. Ke3 Nxb4 47. Ke4 c5 48. Ke5 Nd3+ 49. Kd5 Nf2 50. Kc4 a6 51. Kd5 Nd1 52. Kc4 Ne3+ 53. Kd3 Nd1 54. Kc4 Ne3+ 55. Kd3 Nd1 56. Ke4 c4 57. Kd4 c3 58. Kd3 b5 59. axb5 axb5 60. Kc2 Ne3+ 61. Kxc3 h5 62. gxh5 Nxf5 63. Ne4 Kd7 64. Kb4 Kc6 1/2-1/2

[Event "Leiden SB-chA"]
[Site "Leiden"]
[Date "2014.05.13"]
[Round "1"]
[White "Aalders, Peter"]
[Black "Van 't Hof, Eric"]
[Result "1-0"]
[ECO "A30"]
[WhiteElo "1884"]
[BlackElo "2079"]
[PlyCount "103"]
[EventDate "2014.05.13"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. c4 c5 5. Nc3 e6 6. 0-0 Be7 7. d4 cxd4 8. Qxd4 0-0 9. Bg5 h6 10. Bxf6 Bxf6 11. Qd3 Na6 12. Rfd1 Nc5 13. Qc2 a5 14. Nd4 Bxg2 15. Kxg2 Qc8 16. Ndb5 Be7 17. Rd2 Qc6+ 18. Kg1 f5 19. e3 d6 20. Rad1 Rad8 21. b3 Rfe8 22. Nd4 Qc8 23. a3 Bf8 24. Ndb5 Qc6 25. Nd4 Qc8 26. b4 axb4 27. axb4 Nd7 28. Na4 Qb7 29. b5 Ne5 30. f4 Nf3+ 31. Nxf3 Qxf3 32. Qb3 Qb7 33. c5 d5 34. c6 Qc7 35. Kg2 Ra8 36. Ra2 Ra5 37. Rda1 Rea8 38. Nc3 Bc5 39. Rxa5 bxa5 40. Nxd5 Qd6 41. Rd1 a4 42. Qc4 Kh8 43. Nc3 Qf8 44. Nxa4 Bxe3 45. b6 Rxa4 46. Qxa4 Bxb6 47. Qc4 e5 48. c7 Qa8+ 49. Kh3 Bxc7 50. Qxc7 Kh7 51. Qxe5 Qc8 52. Rd5 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2013.07.02"]
[Round "7"]
[White "Aalders, Peter"]
[Black "Stins, Johan"]
[Result "0-1"]
[ECO "E69"]
[WhiteElo "1903"]
[BlackElo "1880"]
[PlyCount "76"]
[EventDate "2013.05.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. g3 0-0 5. Bg2 d6 6. d4 Nbd7 7. 0-0 c6 8. e4 e5 9. h3 Qc7 10. Qc2 Rb8 11. c5 dxc5 12. dxe5 Ne8 13. e6 fxe6 14. Ng5 Nb6 15. Be3 Qe7 16. f4 Bd4 17. Bxd4 cxd4 18. Ne2 c5 19. e5 Nd5 20. Rfc1 b6 21. Bxd5 exd5 22. b4 Bf5 23. Qd2 h6 24. Nf3 Ng7 25. Nfxd4 cxd4 26. Nxd4 Rbc8 27. Nxf5 Rxc1+ 28. Rxc1 Rxf5 29. Qxd5+ Qe6 30. Qa8+ Rf8 31. Qxa7 Qxh3 32. Rc7 Qxg3+ 33. Kh1 Qf3+ 34. Kg1 Qg3+ 35. Kh1 Nh5 36. Qb7 Qh3+ 37. Kg1 Qe3+ 38. Kg2 Qxf4 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2013.06.25"]
[Round "6"]
[White "Schenkelaars, Vincent"]
[Black "Aalders, Peter"]
[Result "1/2-1/2"]
[ECO "D43"]
[BlackElo "1903"]
[PlyCount "90"]
[EventDate "2013.05.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d5 3. c4 c6 4. Nc3 e6 5. Bf4 dxc4 6. a4 Bb4 7. Qc2 Qa5 8. Bd2 b5 9. g3 Bb7 10. Bg2 a6 11. 0-0 Qb6 12. Nxb5 cxb5 13. Bxb4 Nbd7 14. axb5 axb5 15. Rxa8+ Bxa8 16. Ra1 Be4 17. Qd2 Bb7 18. Qg5 Rg8 19. Ne1 h6 20. Qd2 Nd5 21. Ba5 Qc6 22. Nc2 f5 23. Nb4 Qd6 24. Nxd5 Bxd5 25. Bb4 Qc6 26. Bxd5 Qxd5 27. Qf4 Qc6 28. Qd6 Qxd6 29. Bxd6 Nb6 30. Ra5 Kd7 31. Bc5 Kc6 32. Ra6 Rb8 33. f3 Rb7 34. Kf1 b4 35. Ke1 Kb5 36. Rxb6+ Rxb6 37. Bxb6 Kxb6 38. Kd2 Kc6 39. e4 Kd6 40. Ke3 g5 41. h3 h5 42. g4 hxg4 43. hxg4 fxg4 44. fxg4 Kc6 45. Kd2 Kd6 1/2-1/2

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2013.06.18"]
[Round "5"]
[White "Aalders, Peter"]
[Black "Polak, Alexander"]
[Result "0-1"]
[ECO "D15"]
[WhiteElo "1903"]
[PlyCount "32"]
[EventDate "2013.05.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. d4 c6 2. c4 d5 3. Nf3 Nf6 4. Nc3 a6 5. c5 Nbd7 6. Bf4 Nh5 7. Qd2 g6 8. e4 dxe4 9. Nxe4 Ndf6 10. Nxf6+ Nxf6 11. Bc4 Bg7 12. Ne5 0-0 13. h3 Nd5 14. Bh2 Be6 15. 0-0 Nc7 16. Rad1 Bxe5 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2013.06.11"]
[Round "4"]
[White "Van Drunick, Jan Willem"]
[Black "Aalders, Peter"]
[Result "1/2-1/2"]
[ECO "E41"]
[BlackElo "1903"]
[PlyCount "47"]
[EventDate "2013.05.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. Nf3 Bxc3+ 7. bxc3 d6 8. 0-0 e5 9. Ng5 0-0 10. d5 Ne7 11. f4 exf4 12. exf4 Ng6 13. Bd2 Re8 14. Qc2 Bd7 15. Rae1 Rxe1 16. Rxe1 Qf8 17. Qb1 b6 18. Ne4 Nxe4 19. Bxe4 Re8 20. Bd3 Rxe1+ 21. Qxe1 Qe7 22. Qd1 f5 23. g3 Nf8 24. Qh5 1/2-1/2

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2013.06.04"]
[Round "3"]
[White "Aalders, Peter"]
[Black "Wagemans, Ed"]
[Result "1-0"]
[ECO "A26"]
[WhiteElo "1903"]
[PlyCount "53"]
[EventDate "2013.05.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. g3 g6 4. Nf3 Nc6 5. Bg2 Bg7 6. 0-0 0-0 7. d3 d6 8. Rb1 a5 9. a3 Bd7 10. b4 axb4 11. axb4 Rb8 12. Bg5 h6 13. Bxf6 Qxf6 14. Nd5 Qd8 15. b5 Ne7 16. Nd2 c6 17. bxc6 Bxc6 18. Nxe7+ Qxe7 19. Bd5 Kh7 20. Qb3 Qc7 21. Qb6 Rfc8 22. Ne4 Bf8 23. Qxc7 Rxc7 24. Bxc6 Rxc6 25. Rb5 Kg7 26. Rfb1 f5 27. Rxb7+ 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2013.05.28"]
[Round "2"]
[White "Bloothoofd, Gerrie"]
[Black "Aalders, Peter"]
[Result "1-0"]
[ECO "C67"]
[BlackElo "1903"]
[PlyCount "33"]
[EventDate "2013.05.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. 0-0 Nxe4 5. Re1 Nd6 6. Ba4 Be7 7. Nxe5 Nxe5 8. Rxe5 0-0 9. d4 Bf6 10. Re1 Nf5 11. c3 Re8 12. Rxe8+ Qxe8 13. Bf4 c6 14. Nd2 d5 15. Nf3 Be6 16. Bc2 Nh4 17. Nxh4 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2013.05.21"]
[Round "1"]
[White "Aalders, Peter"]
[Black "Bingen, Stanley"]
[Result "1-0"]
[ECO "D53"]
[WhiteElo "1903"]
[PlyCount "95"]
[EventDate "2013.05.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. Nf3 Nc6 2. d4 d5 3. c4 Nf6 4. Nc3 e6 5. Bg5 Be7 6. e3 a6 7. Rc1 0-0 8. a3 Bd7 9. Bxf6 Bxf6 10. cxd5 Na7 11. Be2 c5 12. dxc6 Nxc6 13. 0-0 Qb6 14. b4 Rfd8 15. Na4 Qc7 16. Qc2 b5 17. Nc5 Be8 18. Bd3 g6 19. Be4 Rac8 20. Qb3 Qe7 21. Nxa6 Kg7 22. Nc5 e5 23. d5 Nb8 24. Rfd1 Rc7 25. Rd2 Rd6 26. Rdc2 Ra7 27. Bd3 Qd8 28. e4 Bd7 29. h3 Bg5 30. Nxg5 Qxg5 31. Nxd7 Nxd7 32. Rc6 Rf6 33. Qc3 Qf4 34. Rxf6 Nxf6 35. g3 Qg5 36. Re1 h5 37. h4 Qg4 38. Bxb5 Nxe4 39. Qe3 Rb7 40. Bc6 Re7 41. Qxe4 f5 42. Qxg4 hxg4 43. d6 Re6 44. d7 Rd6 45. Rxe5 Kf6 46. Re8 Rxd7 47. Bxd7 Kf7 48. b5 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2011.06.28"]
[Round "7"]
[White "Van Drunick, Jan Willem"]
[Black "Aalders, Peter"]
[Result "1/2-1/2"]
[ECO "D85"]
[WhiteElo "1945"]
[BlackElo "1930"]
[PlyCount "61"]
[EventDate "2011.05.17"]
[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 g6 3. Nc3 d5 4. cxd5 Nxd5 5. Na4 Bg7 6. e4 Nb6 7. Be3 0-0 8. Nf3 Nc6 9. Nc5 e5 10. d5 Ne7 11. Qb3 Rb8 12. Rd1 Bg4 13. Be2 Nec8 14. 0-0 Nd6 15. h3 Bxf3 16. Bxf3 a6 17. Be2 Nd7 18. Ne6 fxe6 19. dxe6 Kh8 20. exd7 Qxd7 21. Qc2 Qf7 22. b3 Nb5 23. Bxb5 axb5 24. Rd2 Rfd8 25. Rfd1 Bf6 26. Rxd8+ Rxd8 27. Rxd8+ Bxd8 28. Qc5 Qe8 29. Qd5 c6 30. Qd2 Bc7 31. Bc5 1/2-1/2

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2011.06.21"]
[Round "6"]
[White "Aalders, Peter"]
[Black "Roorda, Thijs"]
[Result "1/2-1/2"]
[ECO "A26"]
[WhiteElo "1930"]
[BlackElo "2076"]
[PlyCount "50"]
[EventDate "2011.05.17"]
[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 e5 2. g3 Nc6 3. Nc3 g6 4. Bg2 Bg7 5. e4 d6 6. Nge2 Be6 7. d3 Qd7 8. Nd5 Nce7 9. Be3 c6 10. Nxe7 Nxe7 11. Qa4 0-0 12. 0-0 f5 13. f3 h6 14. Rad1 g5 15. Bf2 b5 16. cxb5 cxb5 17. Qa5 Nc6 18. Qd2 Bxa2 19. exf5 Qxf5 20. f4 Rac8 21. fxg5 Qxg5 22. Be3 Qh5 23. Rxf8+ Bxf8 24. Rc1 Ne7 25. Nc3 Be6 1/2-1/2

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2011.06.15"]
[Round "5"]
[White "Lauer, Albert"]
[Black "Aalders, Peter"]
[Result "1/2-1/2"]
[ECO "A01"]
[WhiteElo "1827"]
[BlackElo "1930"]
[PlyCount "134"]
[EventDate "2011.05.17"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. b3 e5 2. Bb2 Nc6 3. c4 Nf6 4. a3 d5 5. cxd5 Nxd5 6. Qc2 Be6 7. e3 Bd6 8. Bb5 0-0 9. Bxc6 bxc6 10. Qxc6 Qg5 11. Kf1 Rab8 12. Qc2 Rxb3 13. Qxb3 Qg6 14. Qd1 Rb8 15. Qc1 Qd3+ 16. Ne2 Qb3 17. Bxe5 Bxe5 18. d4 Bf6 19. Nd2 Qd3 20. Rb1 Rc8 21. Nf3 Nc3 22. Rb2 Bc4 23. Qc2 Qxe2+ 24. Qxe2 Nxe2 25. Rxe2 Rb8 26. Nd2 Bd3 27. f3 Bxd4 28. exd4 Re8 29. Ne4 Bxe2+ 30. Kxe2 f5 31. Kd3 fxe4+ 32. fxe4 Rb8 33. Rc1 Rb3+ 34. Rc3 Rb2 35. Rxc7 Rxg2 36. Rc2 Rg1 37. e5 Kf7 38. Rc7+ Ke6 39. Rxa7 Rd1+ 40. Kc3 Rc1+ 41. Kd2 Ra1 42. Rxg7 Ra2+ 43. Ke3 Rxh2 44. Ke4 Rh4+ 45. Ke3 Rh3+ 46. Ke4 Rh4+ 47. Ke3 Rh3+ 48. Kf4 Rxa3 49. Rxh7 Ra1 50. Rh6+ Ke7 51. Rh3 Ke6 52. Ke4 Ra4 53. Rd3 Rb4 54. Kf4 Kd5 55. Kf5 Rb8 56. Kf6 Rb6+ 57. Kf5 Rb8 58. Kf4 Rh8 59. Ke3 Rh3+ 60. Kd2 Rh8 61. Kc2 Rg8 62. Rd2 Rh8 63. Kc3 Rh4 64. Rd3 Rg4 65. e6 Kxe6 66. Kc4 Rg2 67. d5+ Kd6 1/2-1/2

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2011.06.07"]
[Round "4"]
[White "Aalders, Peter"]
[Black "Heemskerk, Wim"]
[Result "0-1"]
[ECO "A40"]
[WhiteElo "1930"]
[BlackElo "2285"]
[PlyCount "16"]
[EventDate "2011.05.17"]
[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 b6 2. d4 e6 3. e4 Bb7 4. Bd3 Bb4+ 5. Nc3 f5 6. Qc2 Nf6 7. Bg5 fxe4 8. Bxf6 exd3 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2011.06.01"]
[Round "3"]
[White "De Ruyter, Wim"]
[Black "Aalders, Peter"]
[Result "0-1"]
[ECO "B13"]
[WhiteElo "1591"]
[BlackElo "1930"]
[PlyCount "76"]
[EventDate "2011.05.17"]
[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 Nc6 5. c3 Qc7 6. Ne2 Bg4 7. Qc2 Bxe2 8. Qxe2 Nxd4 9. Bb5+ Nxb5 10. Qxb5+ Qc6 11. Qe2 Nf6 12. 0-0 e6 13. Be3 Be7 14. Nd2 0-0 15. Bd4 Rfe8 16. Qd3 a6 17. Kh1 Nd7 18. Qg3 Bf6 19. Be3 Rac8 20. f4 g6 21. f5 exf5 22. Rae1 Bg7 23. Nf3 Nf6 24. Nd4 Ne4 25. Qf3 Bxd4 26. cxd4 Qb5 27. g4 Nd6 28. Bf4 Rxe1 29. Rxe1 fxg4 30. Qxg4 Nf5 31. h4 Qxb2 32. Rg1 Qc2 33. h5 Qe4+ 34. Rg2 Rc2 35. h6 Nh4 36. Bd2 Nxg2 37. Qg5 Qh4+ 38. Kg1 Qxg5 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2011.05.24"]
[Round "2"]
[White "Aalders, Peter"]
[Black "Oei, Hway Ik"]
[Result "0-1"]
[ECO "A37"]
[WhiteElo "1930"]
[BlackElo "2095"]
[PlyCount "64"]
[EventDate "2011.05.17"]
[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 c5 2. g3 Nc6 3. Bg2 g6 4. Nc3 Bg7 5. Nf3 d6 6. 0-0 e5 7. a3 Nge7 8. b4 0-0 9. Rb1 h6 10. Ne1 Rb8 11. Nc2 Be6 12. Ne3 b6 13. b5 Na5 14. d3 f5 15. Bd2 g5 16. Ned5 Ng6 17. e3 e4 18. dxe4 Nxc4 19. exf5 Bxf5 20. e4 Be6 21. f4 Bd4+ 22. Kh1 gxf4 23. gxf4 Nxd2 24. Qxd2 Qh4 25. Ne2 Bg7 26. Rb3 Bg4 27. Bf3 Bh3 28. Rg1 Kh7 29. Rg3 Bf1 30. Rg4 Qf2 31. e5 Bxe2 32. Bxe2 Qd4 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2011.05.17"]
[Round "1"]
[White "Van der Bent, Fred"]
[Black "Aalders, Peter"]
[Result "0-1"]
[ECO "B18"]
[WhiteElo "1204"]
[BlackElo "1930"]
[PlyCount "80"]
[EventDate "2011.05.17"]
[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. Nc3 d5 3. d4 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Nf3 Nd7 7. Be3 Ngf6 8. Bd3 e6 9. 0-0 Bd6 10. Qd2 Bxd3 11. Qxd3 Qc7 12. c4 0-0 13. b3 Rfd8 14. Rad1 a5 15. a4 c5 16. Qc3 cxd4 17. Nxd4 Nd5 18. Qd2 Nxe3 19. Qxe3 Bxg3 20. fxg3 Qb6 21. Kh1 e5 22. Nf5 Qxe3 23. Nxe3 Nc5 24. Rb1 Rd3 25. Rfe1 f6 26. Nd5 Nxb3 27. Re3 Rxe3 28. Nxe3 Nc5 29. Nd5 Nxa4 30. Rxb7 Nc5 31. Rb5 a4 32. Rxc5 a3 33. Nc3 a2 34. Nxa2 Rxa2 35. h4 e4 36. Kg1 Kf7 37. Rc6 Rc2 38. g4 e3 39. h5 Rc1+ 40. Kh2 e2 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2010.06.29"]
[Round "7"]
[White "Aalders, Peter"]
[Black "Scherpenisse, Kees"]
[Result "0-1"]
[ECO "D11"]
[WhiteElo "1931"]
[BlackElo "1915"]
[PlyCount "79"]
[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 d5 2. c4 c6 3. Nf3 Nf6 4. e3 a6 5. b3 Bg4 6. Bd3 e6 7. Nbd2 Nbd7 8. Bb2 Bd6 9. Qc2 Qb8 10. h3 Bh5 11. 0-0 Bg6 12. Bxg6 hxg6 13. e4 dxe4 14. Nxe4 Nxe4 15. Qxe4 Nf6 16. Qc2 Kf8 17. Ne5 Qc7 18. Rfe1 Re8 19. Rad1 g5 20. Qe2 Bb4 21. Rf1 Rh4 22. Qf3 Rf4 23. Qe3 Bd6 24. Rd3 c5 25. dxc5 Bxc5 26. Qd2 Ne4 27. Nd7+ Kg8 28. Qc1 Bxf2+ 29. Rxf2 Nxf2 30. Rd2 Rf5 31. Rxf2 Qxd7 32. Rd2 Qc7 33. Qc3 f6 34. Qe3 Kf7 35. Qe4 Rf4 36. Qe2 Rd8 37. Rxd8 Qxd8 38. Qh5+ Kg8 39. Qe2 Qb8 40. Kh2 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2010.06.22"]
[Round "6"]
[White "Heemskerk, Wim"]
[Black "Aalders, Peter"]
[Result "1-0"]
[ECO "A11"]
[WhiteElo "2263"]
[BlackElo "1931"]
[PlyCount "79"]
[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. c4 c6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Bg4 5. Ne5 Bh5 6. cxd5 cxd5 7. Nc3 e6 8. Qa4+ Nbd7 9. g4 Bg6 10. h4 h6 11. Nxg6 fxg6 12. g5 Nh5 13. Qg4 Qe7 14. Bh3 0-0-0 15. d3 Re8 16. Qa4 Kb8 17. Be3 Nb6 18. Qb5 Qd7 19. Qxd7 Nxd7 20. Nxd5 exd5 21. Bxd7 Bb4+ 22. Kd1 Re7 23. Bg4 Rf8 24. Rc1 b6 25. a3 Bd6 26. Rc6 Be5 27. gxh6 gxh6 28. d4 Bf4 29. Rxg6 Bxe3 30. fxe3 Ng3 31. Rh3 Ne4 32. Rf3 Nf2+ 33. Ke1 Rxf3 34. Bxf3 Ne4 35. Rxh6 Rg7 36. Bxe4 dxe4 37. Re6 Rg4 38. h5 Rh4 39. h6 Rh2 40. Rxe4 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2010.06.15"]
[Round "5"]
[White "Aalders, Peter"]
[Black "Roorda, Thijs"]
[Result "1/2-1/2"]
[ECO "E11"]
[WhiteElo "1931"]
[BlackElo "1970"]
[PlyCount "64"]
[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 Nf6 3. g3 Bb4+ 4. Bd2 Be7 5. Bg2 d5 6. Nf3 0-0 7. 0-0 b6 8. Ne5 Bb7 9. Qc2 Nfd7 10. Nc3 Nxe5 11. dxe5 c6 12. cxd5 cxd5 13. f4 Nc6 14. Rfd1 Rc8 15. Qa4 Nd4 16. e3 Rc4 17. Qxa7 Qc7 18. exd4 Ra8 19. Qxa8+ Bxa8 20. Be3 Bb4 21. Bf1 Bxc3 22. bxc3 Rxc3 23. Bd2 Rc2 24. Bd3 Rxd2 25. Rxd2 Qc3 26. Rad1 Qxd4+ 27. Kf1 g6 28. Bxg6 Qe3 29. Bh5 Bb7 30. Kg2 d4+ 31. Kh3 Qe4 32. Kh4 Bd5 1/2-1/2

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2010.06.08"]
[Round "4"]
[White "Aalders, Peter"]
[Black "Heijboer, Herman"]
[Result "1-0"]
[ECO "D21"]
[WhiteElo "1931"]
[BlackElo "1745"]
[PlyCount "41"]
[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 d5 2. c4 dxc4 3. e3 c5 4. Nf3 cxd4 5. Bxc4 Nf6 6. exd4 Bg4 7. Bxf7+ Kxf7 8. Ne5+ Ke8 9. Nxg4 Nc6 10. Nxf6+ exf6 11. Be3 Bd6 12. Nc3 Qd7 13. 0-0 h5 14. Re1 Kf8 15. Rc1 a6 16. Ne4 Kg8 17. Qb3+ Kh7 18. Nxd6 Qxd6 19. Qxb7 Ne7 20. Rc5 Rhb8 21. Qf3 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2010.06.01"]
[Round "3"]
[White "Van Wissen, Michiel"]
[Black "Aalders, Peter"]
[Result "1-0"]
[ECO "C49"]
[WhiteElo "2250"]
[BlackElo "1931"]
[PlyCount "43"]
[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. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. 0-0 0-0 6. d3 d6 7. Bg5 Bxc3 8. bxc3 Qe7 9. Re1 Nd8 10. d4 Ne6 11. Bc1 c5 12. a4 Rd8 13. Bd3 cxd4 14. cxd4 exd4 15. Ba3 Qc7 16. Bb2 Qb6 17. Rb1 Qc5 18. Bf1 Bd7 19. Nxd4 Rac8 20. Nf5 Kf8 21. Bxf6 gxf6 22. Qh5 1-0

[Event "Leiden LCT op 3rd"]
[Site "Leiden"]
[Date "2009.07.14"]
[Round "5"]
[White "Aalders, Peter"]
[Black "Oudshoorn, Arres"]
[Result "0-1"]
[ECO "E91"]
[PlyCount "110"]
[EventDate "2009.07.10"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 131 Extra"]
[Source "ChessBase"]
[SourceDate "2009.09.03"]
[SourceVersion "2"]
[SourceVersionDate "2009.09.16"]
[SourceQuality "1"]

1. Nf3 g6 2. c4 Bg7 3. d4 c6 4. e4 d6 5. Nc3 Nf6 6. Be2 Nbd7 7. 0-0 0-0 8. Be3 a6 9. Qc2 b5 10. a3 Nb6 11. cxb5 cxb5 12. d5 Bb7 13. Bd4 Rc8 14. Qb3 Nbd7 15. a4 b4 16. Qxb4 Qc7 17. Rfc1 a5 18. Qa3 Nc5 19. Nd2 Bh6 20. Nb5 Qb6 21. Be3 Bxe3 22. Qxe3 Nfd7 23. Nc4 Qd8 24. Bg4 Rb8 25. Bxd7 Qxd7 26. Nxa5 Nxa4 27. Nc6 Ra8 28. b4 Rfc8 29. Nbd4 e5 30. dxe6 fxe6 31. b5 Nc5 32. e5 dxe5 33. Rxa8 Rxa8 34. Nxe5 Qd5 35. Ndf3 Nb3 36. Re1 Qxb5 37. Ng4 Bd5 38. Nf6+ Kf7 39. Nxd5 Qxd5 40. Qh6 Kg8 41. Ng5 Ra7 42. h4 Nd4 43. Rb1 Qa8 44. Ne4 Ra1 45. Rxa1 Qxa1+ 46. Kh2 Ne2 47. Kh3 Qh1+ 48. Kg4 Qxg2+ 49. Ng3 Nxg3 50. fxg3 Qf1 51. Qg5 Qf5+ 52. Qxf5 exf5+ 53. Kg5 Kg7 54. g4 fxg4 55. Kxg4 Kf6 0-1

[Event "Leiden LCT op 3rd"]
[Site "Leiden"]
[Date "2009.07.12"]
[Round "3"]
[White "Aalders, Peter"]
[Black "Van Ginkel, Henk"]
[Result "1-0"]
[ECO "E97"]
[PlyCount "123"]
[EventDate "2009.07.10"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 131 Extra"]
[Source "ChessBase"]
[SourceDate "2009.09.03"]
[SourceVersion "2"]
[SourceVersionDate "2009.09.16"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 d6 3. d4 g6 4. Nc3 Bg7 5. e4 0-0 6. Be2 e5 7. 0-0 Nc6 8. d5 Ne7 9. b4 Ne8 10. c5 h6 11. a4 a5 12. Ba3 axb4 13. Bxb4 f5 14. Nd2 fxe4 15. Ndxe4 Nf5 16. Bd3 Nd4 17. cxd6 Nxd6 18. Nxd6 cxd6 19. Ne4 Nf5 20. a5 Rf7 21. Ra3 Bf8 22. Qd2 Nd4 23. f3 Bf5 24. Ng3 Bxd3 25. Qxd3 Kg7 26. Ne4 Ra6 27. Raa1 Qd7 28. Rab1 g5 29. Kh1 Ra8 30. Bd2 Be7 31. Rb6 Rff8 32. Rfb1 Rfb8 33. a6 Ra7 34. Ng3 Qe8 35. axb7 h5 36. Be3 h4 37. Ne4 Nf5 38. Bxg5 Bxg5 39. Nxg5 Qg6 40. Ne6+ Kh8 41. Kg1 Ra2 42. R6b2 Rxb2 43. Rxb2 h3 44. g4 Qh6 45. g5 Qh4 46. Rb1 Nd4 47. Qe4 Qh5 48. Nxd4 Qxg5+ 49. Kf1 Qg2+ 50. Ke1 exd4 51. Qxd4+ Qg7 52. Qxg7+ Kxg7 53. Kf2 Kf6 54. Ke3 Ke5 55. Rb5 Kf5 56. Kd4 Kf4 57. Rb3 Kf5 58. Rb6 Kf4 59. Kc4 Kxf3 60. Kb5 Kg2 61. Kc6 Kxh2 62. Kc7 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2009.06.30"]
[Round "7"]
[White "Van Os, Albert"]
[Black "Aalders, Peter"]
[Result "0-1"]
[ECO "C86"]
[WhiteElo "1875"]
[BlackElo "1804"]
[PlyCount "108"]
[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 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 b5 6. Bb3 Be7 7. c3 0-0 8. 0-0 d6 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. d5 c4 13. Be3 Bd7 14. Nbd2 Nb7 15. a4 Nc5 16. Rfc1 Nxa4 17. Bxa4 bxa4 18. Qxc4 Rfc8 19. Qd3 Rab8 20. Rc2 Be8 21. Qe2 Rb7 22. Ne1 Qb8 23. Nd3 a5 24. c4 Rbc7 25. f4 exf4 26. Bxf4 Nd7 27. Kh2 f6 28. Rac1 Ne5 29. Be3 Nxd3 30. Qxd3 Qb4 31. Bd4 Bg6 32. Bc3 Qb6 33. Bd4 Qb4 34. Bc3 Qb6 35. Ra1 Be8 36. Qg3 Qa6 37. Rcc1 Kh8 38. Rf1 Bf8 39. e5 dxe5 40. Bxe5 Rf7 41. Bf4 g5 42. Bxg5 fxg5 43. Qxg5 Qd6+ 44. Kh1 Rg7 45. Qf4 Bg6 46. Qxd6 Bxd6 47. Rxa4 Bb4 48. Nf3 Rxc4 49. Raa1 Be4 50. Rad1 Bd6 51. Rd2 Rf7 52. Rdd1 Rc2 53. b3 Rg7 54. Rg1 Bxf3 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2009.06.23"]
[Round "6"]
[White "Aalders, Peter"]
[Black "Hilarius, Sander"]
[Result "1/2-1/2"]
[ECO "D58"]
[WhiteElo "1804"]
[BlackElo "1935"]
[PlyCount "82"]
[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 e6 3. Nc3 Nf6 4. Bg5 Be7 5. Nf3 h6 6. Bh4 0-0 7. e3 b6 8. Be2 Bb7 9. Bxf6 Bxf6 10. cxd5 exd5 11. b4 Nd7 12. 0-0 c5 13. bxc5 bxc5 14. Rb1 cxd4 15. Nxd4 Nc5 16. Na4 Nxa4 17. Qxa4 Qe8 18. Qxe8 Rfxe8 19. Rxb7 Bxd4 20. Bf3 Bb6 21. Bxd5 Red8 22. Bxf7+ Kh8 23. g3 Rd2 24. Rb1 Rc8 25. Rb5 Rc1+ 26. Kg2 Bxe3 27. Rb2 Rcc2 28. Rxc2 Rxc2 29. Rb8+ Kh7 30. Bg8+ Kg6 31. Rf8 Bb6 32. Rf3 Rd2 33. Bf7+ Kh7 34. h4 g5 35. h5 Rd7 36. Bg6+ Kg7 37. Rf5 Rd2 38. a4 Ra2 39. Be8 Re2 40. Bc6 Re6 41. Bb5 Rf6 1/2-1/2

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2009.06.09"]
[Round "4"]
[White "Kuipers, Joris"]
[Black "Aalders, Peter"]
[Result "0-1"]
[ECO "D00"]
[WhiteElo "1561"]
[BlackElo "1804"]
[PlyCount "58"]
[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. Bf4 Nf6 3. e3 c5 4. Nd2 Nc6 5. c3 Qb6 6. Qb3 c4 7. Qc2 g6 8. e4 dxe4 9. Nxe4 Nxe4 10. Qxe4 Qxb2 11. Rc1 Bf5 12. Qe2 Qa3 13. Qxc4 Rc8 14. Bd3 Bxd3 15. Qxd3 Bg7 16. Qb1 0-0 17. Ne2 e5 18. dxe5 Nxe5 19. 0-0 Qa6 20. Nd4 Nd3 21. Be3 Nxc1 22. Rxc1 Rfd8 23. Nb5 b6 24. Nxa7 Rxc3 25. Rxc3 Bxc3 26. g3 Qxa7 27. Bxb6 Qb7 28. Qc2 Qxb6 29. Qxc3 Qb1+ 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2009.06.02"]
[Round "3"]
[White "Aalders, Peter"]
[Black "De Beule, Eddy"]
[Result "0-1"]
[ECO "D11"]
[WhiteElo "1804"]
[BlackElo "1931"]
[PlyCount "69"]
[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. Nf3 d5 2. d4 c6 3. c4 dxc4 4. a4 e6 5. e3 b5 6. b3 Bb4+ 7. Bd2 Bxd2+ 8. Qxd2 cxb3 9. axb5 Ne7 10. Nc3 0-0 11. Bd3 cxb5 12. Nxb5 Bb7 13. 0-0 a5 14. Rfb1 a4 15. Nc3 Bxf3 16. gxf3 Nf5 17. Bxf5 exf5 18. Rxa4 Rxa4 19. Nxa4 Qd5 20. Nc3 Qxf3 21. Qd1 Qh3 22. Rxb3 Nd7 23. Nd5 Rd8 24. Nf4 Qh4 25. Qf3 Nf6 26. Qg3 Qh6 27. Nd3 Nd7 28. Qc7 Qg5+ 29. Kf1 h5 30. Rb5 Nf8 31. Ne5 Qf6 32. Rb8 Rxb8 33. Qxb8 Qe6 34. Qd8 g6 35. Nd7 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2009.05.19"]
[Round "1"]
[White "Aalders, Peter"]
[Black "Heemskerk, Wim"]
[Result "0-1"]
[ECO "D58"]
[WhiteElo "1804"]
[BlackElo "2182"]
[PlyCount "94"]
[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. Nf3 d5 2. d4 Nf6 3. c4 e6 4. Nc3 Be7 5. Bg5 h6 6. Bh4 0-0 7. e3 b6 8. Be2 Bb7 9. Bxf6 Bxf6 10. cxd5 exd5 11. 0-0 Nd7 12. Rc1 c6 13. Qa4 a5 14. Rfd1 Re8 15. Bf1 Qe7 16. g3 Qe6 17. Bg2 g5 18. Qc2 Kg7 19. Re1 g4 20. Nd2 c5 21. Ne2 Bg5 22. dxc5 bxc5 23. Nb3 Rec8 24. Nf4 Qe5 25. h4 Be7 26. Qd1 Nf6 27. Nd3 Qb8 28. Nbxc5 Bc6 29. b3 Bb5 30. Na4 Rxc1 31. Nxc1 Bb4 32. Ne2 Bxe1 33. Qxe1 Bxa4 34. bxa4 Qb4 35. Qa1 Rc8 36. Nf4 Qc3 37. Qxc3 Rxc3 38. Nxd5 Rc1+ 39. Kh2 Rc2 40. Nxf6 Kxf6 41. Kg1 Ke5 42. Bf1 Rxa2 43. Bb5 Rb2 44. Be8 f6 45. Kg2 Rb4 46. Bd7 Ke4 47. Bb5 Rxb5 0-1

