[Event "Leiden Noteboom Memorial 69th"]
[Site "Leiden"]
[Date "2009.02.22"]
[Round "6"]
[White "Van Vliet, Harry"]
[Black "Sonder, Peter"]
[Result "1-0"]
[ECO "E73"]
[WhiteElo "2089"]
[BlackElo "2065"]
[PlyCount "47"]
[EventDate "2009.02.07"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 128 Extra"]
[Source "ChessBase"]
[SourceDate "2009.03.05"]
[SourceVersion "2"]
[SourceVersionDate "2009.03.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Bg5 Nbd7 7. f4 c5 8. d5 a6 9. a4 b6 10. Nf3 h6 11. Bh4 Nh7 12. Qd2 Re8 13. 0-0 Qc7 14. Rad1 Bb7 15. Bd3 f6 16. e5 f5 17. e6 Ndf6 18. Bxf6 Nxf6 19. Nh4 Kh7 20. Nxg6 Kxg6 21. Bxf5+ Kxf5 22. Qd3+ Ne4 23. Qxe4+ Kf6 24. Qh7 1-0

[Event "Leiden Noteboom Memorial 69th"]
[Site "Leiden"]
[Date "2009.02.21"]
[Round "4"]
[White "Sonder, Peter"]
[Black "Tempelman, Kristianne"]
[Result "1-0"]
[ECO "B21"]
[WhiteElo "2065"]
[BlackElo "1925"]
[PlyCount "53"]
[EventDate "2009.02.07"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 128 Extra"]
[Source "ChessBase"]
[SourceDate "2009.03.05"]
[SourceVersion "2"]
[SourceVersionDate "2009.03.25"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 d6 6. Bc4 e6 7. 0-0 Nge7 8. Bg5 a6 9. Qe2 Qc7 10. Rac1 Ng6 11. Bb3 Be7 12. Be3 0-0 13. Na4 b5 14. Nb6 Rb8 15. Nd5 Qd7 16. Nxe7+ Ncxe7 17. h4 e5 18. h5 Nf4 19. Bxf4 exf4 20. Qd2 Bb7 21. Qxf4 Nc6 22. Rcd1 Qe7 23. Rxd6 a5 24. Rfd1 a4 25. Rd7 Qe8 26. h6 axb3 27. Qg5 1-0

[Event "Vlissingen HZ op 12th"]
[Site "Vlissingen"]
[Date "2008.08.07"]
[Round "7"]
[White "Duinmaijer, Martin"]
[Black "Sonder, Peter"]
[Result "1-0"]
[ECO "C07"]
[WhiteElo "1816"]
[BlackElo "2079"]
[PlyCount "121"]
[EventDate "2008.08.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 125 Extra"]
[Source "ChessBase"]
[SourceDate "2008.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2008.09.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. c3 d5 4. exd5 Qxd5 5. Na3 Nf6 6. Bc4 Qd8 7. 0-0 e6 8. Nc2 Be7 9. d4 cxd4 10. Ncxd4 Bd7 11. Nxc6 Bxc6 12. Qxd8+ Rxd8 13. Nd4 Bd7 14. Bb5 0-0 15. Bxd7 Rxd7 16. Be3 Nd5 17. Nb3 Nxe3 18. fxe3 Rfd8 19. Kf2 f5 20. Ke2 Bg5 21. Nd4 Rd6 22. Rad1 g6 23. Nc2 Kf7 24. Rxd6 Rxd6 25. Rd1 Rb6 26. b4 Be7 27. a4 e5 28. b5 Ke6 29. g3 h6 30. c4 Rd6 31. Rd3 g5 32. Na1 Rxd3 33. Kxd3 Bb4 34. Nb3 Kd6 35. Nc1 h5 36. Nb3 a5 37. Ke2 b6 38. Kd3 Ba3 39. Ke2 Bb4 40. Kd3 Ke6 41. Ke2 e4 42. Kf2 Ke5 43. Ke2 Bd6 44. Kf2 Be7 45. Nd4 Bc5 46. Nb3 Be7 47. Nd4 Kf6 48. Nb3 Ba3 49. c5 bxc5 50. Nxa5 Bb4 51. Nc4 Ke6 52. a5 Kd7 53. a6 Kc7 54. b6+ Kb8 55. Ne5 Bc3 56. Nc6+ Kc8 57. b7+ Kc7 58. b8Q+ Kxc6 59. a7 Kd5 60. a8Q+ Kc4 61. Qbb7 1-0

[Event "Vlissingen HZ op 12th"]
[Site "Vlissingen"]
[Date "2008.08.03"]
[Round "3"]
[White "Akesson, Ralf"]
[Black "Sonder, Peter"]
[Result "1-0"]
[ECO "E94"]
[WhiteElo "2481"]
[BlackElo "2079"]
[PlyCount "107"]
[EventDate "2008.08.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 125 Extra"]
[Source "ChessBase"]
[SourceDate "2008.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2008.09.01"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. d4 0-0 6. Be2 Nbd7 7. 0-0 e5 8. Be3 c6 9. d5 c5 10. Ne1 Ne8 11. g4 g5 12. Qd2 f6 13. h4 h6 14. Kg2 Rf7 15. Rb1 Nf8 16. h5 b6 17. Nd3 Rb7 18. b4 Rab8 19. Rb2 Nd7 20. Rfb1 Bf8 21. f3 Ng7 22. Bd1 Rc7 23. Nb5 Rcb7 24. bxc5 dxc5 25. Ba4 Ne8 26. Qe2 Bd6 27. Nc3 Rc7 28. Bc6 Ba6 29. Nb5 Bxb5 30. cxb5 Bf8 31. a4 Nd6 32. Ra2 Qe7 33. Nb2 Qf7 34. Rba1 f5 35. Bxd7 Rxd7 36. gxf5 Ne8 37. Nc4 Bd6 38. Rh1 Nf6 39. Kf1 Re8 40. a5 Rb8 41. axb6 axb6 42. Bd2 Qe8 43. Bc3 Rdd8 44. Kg1 Rb7 45. Ra8 Bb8 46. Nxe5 Nxd5 47. exd5 Re7 48. Rxb8 Rxb8 49. d6 Ra7 50. Qc4+ Kh7 51. f6 Rba8 52. f7 Ra1+ 53. Kg2 R8a2+ 54. Kg3 1-0

[Event "Vlissingen HZ op 11th"]
[Site "Vlissingen"]
[Date "2007.08.09"]
[Round "7"]
[White "Sengupta, Deep"]
[Black "Sonder, Peter"]
[Result "1-0"]
[ECO "B33"]
[WhiteElo "2435"]
[BlackElo "2074"]
[PlyCount "73"]
[EventDate "2007.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 119 Extra"]
[Source "ChessBase"]
[SourceDate "2007.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2007.09.04"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Na3 a6 8. Nc4 Bg4 9. f3 Be6 10. Ne3 Rc8 11. Ncd5 Be7 12. Bd3 0-0 13. 0-0 Re8 14. a4 Bf8 15. Bd2 Nh5 16. g3 g6 17. a5 Bg7 18. Nb6 Rb8 19. b4 Rf8 20. c3 Ne7 21. Ned5 Nxd5 22. exd5 Bd7 23. c4 Bh3 24. Re1 f5 25. Ra3 Qe7 26. Qc2 Qf7 27. c5 e4 28. Bf1 Bxf1 29. Rxf1 Rbe8 30. fxe4 Rxe4 31. Qxe4 fxe4 32. Rxf7 Rxf7 33. c6 Rc7 34. Be3 bxc6 35. dxc6 Rxc6 36. b5 Rc7 37. Nd5 1-0

[Event "Vlissingen HZ op 11th"]
[Site "Vlissingen"]
[Date "2007.08.06"]
[Round "4"]
[White "Struk, Jerzy"]
[Black "Sonder, Peter"]
[Result "1-0"]
[ECO "B22"]
[WhiteElo "2240"]
[BlackElo "2074"]
[PlyCount "87"]
[EventDate "2007.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 119 Extra"]
[Source "ChessBase"]
[SourceDate "2007.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2007.09.04"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. c3 Nf6 4. e5 Nd5 5. d4 cxd4 6. Bc4 Nb6 7. Bb3 d5 8. exd6 Qxd6 9. 0-0 Be6 10. Na3 Bxb3 11. Qxb3 e6 12. Nb5 Qd8 13. Nbxd4 Nxd4 14. Nxd4 Be7 15. Rd1 Qc7 16. Qb5+ Nd7 17. Nf3 Rd8 18. Qa4 a6 19. Bf4 Qc6 20. Qxc6 bxc6 21. Rd4 f6 22. Rc4 e5 23. Be3 Rc8 24. Ra4 Nb8 25. Ba7 0-0 26. b3 Rfd8 27. Bxb8 Rxb8 28. Rxa6 Rbc8 29. Kf1 Rd3 30. Rc1 e4 31. Nd4 Kf7 32. Rxc6 Rxc6 33. Nxc6 Bd6 34. Ke2 Bf4 35. Rc2 h5 36. g3 Bc7 37. Rd2 Bb6 38. Rxd3 exd3+ 39. Kxd3 Bxf2 40. a4 g5 41. a5 f5 42. a6 f4 43. gxf4 g4 44. Ne5+ 1-0

[Event "Vlissingen HZ op 11th"]
[Site "Vlissingen"]
[Date "2007.08.05"]
[Round "3"]
[White "Sonder, Peter"]
[Black "Afek, Yochanan"]
[Result "1/2-1/2"]
[ECO "B22"]
[WhiteElo "2074"]
[BlackElo "2350"]
[PlyCount "177"]
[EventDate "2007.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 119 Extra"]
[Source "ChessBase"]
[SourceDate "2007.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2007.09.04"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 d5 4. exd5 Qxd5 5. cxd4 Nc6 6. Nf3 e5 7. Nc3 Bb4 8. Be2 exd4 9. 0-0 Qd8 10. Nb5 Nge7 11. a3 Bc5 12. Bf4 0-0 13. Bc7 Qd7 14. b4 Nd5 15. Bg3 Bb6 16. Bd3 Qg4 17. Nd6 Qh5 18. Re1 Bg4 19. b5 Nc3 20. Qc2 Bxf3 21. gxf3 Nd8 22. Re5 Qxf3 23. Rf5 Qg4 24. Rf4 Qg5 25. Bxh7+ Kh8 26. Rh4 Bc7 27. Bf5+ Kg8 28. Bh7+ Kh8 29. Ne4 Bxg3 30. hxg3 Qe5 31. Nxc3 g6 32. Bxg6+ Kg7 33. Bd3 dxc3 34. Rg4+ Kf6 35. Rf4+ Kg7 36. Re4 Qc5 37. Rae1 Ne6 38. Re5 Qe7 39. R1e4 Rfc8 40. Qc1 Qf6 41. Rg4+ Kf8 42. Rf5 Qh8 43. Rh4 Qg7 44. Bc4 Rxc4 45. Rxc4 Nd4 46. Rxd4 Qxd4 47. Qh6+ Qg7 48. Qd6+ Kg8 49. Qc5 b6 50. Qd5 Rc8 51. Rg5 c2 52. Rxg7+ Kxg7 53. Qg5+ Kf8 54. Qc1 Ke7 55. Kg2 Rc5 56. g4 Kd6 57. Kf3 Kd5 58. Ke3 Rc3+ 59. Kd2 Kd4 60. Ke2 Kc4 61. Qf4+ Kd5 62. Qxf7+ Kc5 63. Qf5+ Kc4 64. Qf4+ Kd5 65. Qc1 Kc4 66. Kd2 Kb3 67. g5 Rc8 68. f4 Rd8+ 69. Ke2 Re8+ 70. Kf3 Rd8 71. Ke2 Re8+ 72. Kf3 Rd8 73. Qe3+ Kb2 74. Qe5+ Kb1 75. Qe4 Rc8 76. g6 Kb2 77. Qe5+ Rc3+ 78. Qxc3+ Kxc3 79. g7 c1Q 80. g8Q Qf1+ 81. Ke4 Qe2+ 82. Kf5 Qxb5+ 83. Kg4 Qe2+ 84. Kf5 Qd3+ 85. Kg4 Qe2+ 86. Kf5 Qd3+ 87. Kg4 Qd1+ 88. Kf5 Qd3+ 89. Kg4 1/2-1/2

[Event "Vlissingen HZ op 10th"]
[Site "Vlissingen"]
[Date "2006.08.12"]
[Round "9"]
[White "Grooten, Herman"]
[Black "Sonder, Peter"]
[Result "1-0"]
[ECO "E93"]
[WhiteElo "2362"]
[BlackElo "2107"]
[PlyCount "71"]
[EventDate "2006.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 113 Extra"]
[Source "ChessBase"]
[SourceDate "2006.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2006.09.14"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Nf3 Nbd7 7. Bg5 e5 8. d5 h6 9. Bh4 a5 10. Nd2 Nc5 11. g4 Qd7 12. f3 Ne8 13. Bf2 Qe7 14. h4 Bd7 15. h5 Bf6 16. hxg6 Bg5 17. gxf7+ Rxf7 18. Qc2 Nf6 19. 0-0-0 Nh7 20. Kb1 Nf8 21. Nf1 a4 22. Ng3 Na6 23. Nf5 Bxf5 24. exf5 Nb4 25. Qe4 Nd7 26. c5 Na6 27. cxd6 cxd6 28. Qxa4 Rff8 29. Bxa6 Rxa6 30. Qb4 Nf6 31. Rhe1 Rc8 32. f4 Nxg4 33. fxg5 Nxf2 34. Rd2 Nh3 35. gxh6 Nf4 36. Qxf4 1-0

[Event "Vlissingen HZ op 10th"]
[Site "Vlissingen"]
[Date "2006.08.11"]
[Round "8"]
[White "Sonder, Peter"]
[Black "De Heer, Henk JJ"]
[Result "1-0"]
[ECO "B50"]
[WhiteElo "2107"]
[PlyCount "85"]
[EventDate "2006.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 113 Extra"]
[Source "ChessBase"]
[SourceDate "2006.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2006.09.14"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Bd3 g6 5. Bc2 Bg7 6. 0-0 0-0 7. d4 cxd4 8. cxd4 Bg4 9. Nc3 Nc6 10. Be3 Rc8 11. Re1 a6 12. Bd3 b5 13. a3 Bxf3 14. gxf3 e5 15. dxe5 Nxe5 16. f4 Nc4 17. Bxc4 Rxc4 18. Qd3 Nh5 19. Nd5 Qh4 20. b3 Rcc8 21. Rac1 Rxc1 22. Bxc1 Re8 23. Bd2 Nf6 24. Nc7 Rc8 25. Nxa6 Nh5 26. Nb4 Nxf4 27. Bxf4 Qxf4 28. Nd5 Qg5+ 29. Kf1 Qh4 30. Kg2 Re8 31. Re2 Be5 32. Qf3 h5 33. Rc2 Bd4 34. Re2 Re5 35. Kf1 f5 36. exf5 Rxe2 37. Kxe2 Qg5 38. fxg6 Qe5+ 39. Kf1 Qe6 40. Qxh5 Bg7 41. Qf5 Qe8 42. Nf6+ Bxf6 43. Qxf6 1-0

[Event "Vlissingen HZ op 10th"]
[Site "Vlissingen"]
[Date "2006.08.10"]
[Round "7"]
[White "Van Loon, Eric"]
[Black "Sonder, Peter"]
[Result "1/2-1/2"]
[ECO "C42"]
[BlackElo "2107"]
[PlyCount "43"]
[EventDate "2006.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 113 Extra"]
[Source "ChessBase"]
[SourceDate "2006.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2006.09.14"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Nc3 Nf6 6. d4 Be7 7. Bd3 0-0 8. h3 Na6 9. a3 c6 10. 0-0 Nc7 11. Ne2 Re8 12. Re1 Bd7 13. Ng3 g6 14. Bd2 Ne6 15. c3 Bf8 16. Qc1 c5 17. Bh6 Bg7 18. Bxg7 Kxg7 19. dxc5 dxc5 20. Ne5 Bc8 21. Bc4 h6 22. f4 1/2-1/2

[Event "Vlissingen HZ op 10th"]
[Site "Vlissingen"]
[Date "2006.08.08"]
[Round "5"]
[White "Sonder, Peter"]
[Black "Vedder, Richard"]
[Result "0-1"]
[ECO "B21"]
[WhiteElo "2107"]
[BlackElo "2229"]
[PlyCount "42"]
[EventDate "2006.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 113 Extra"]
[Source "ChessBase"]
[SourceDate "2006.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2006.09.14"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 d6 6. Bc4 a6 7. Bg5 Nf6 8. Bxf6 gxf6 9. Nh4 e6 10. 0-0 Be7 11. Qh5 Ne5 12. Bb3 Bd7 13. Kh1 Ng6 14. Nf5 Bc6 15. Ng7+ Kd7 16. Bxe6+ fxe6 17. f4 Qg8 18. Nxe6 Qxe6 19. e5 Nxf4 20. Rxf4 fxe5 21. Rf2 Raf8 0-1

[Event "Vlissingen HZ op 10th"]
[Site "Vlissingen"]
[Date "2006.08.07"]
[Round "4"]
[White "Karasik, Evgeni"]
[Black "Sonder, Peter"]
[Result "1-0"]
[ECO "B33"]
[WhiteElo "2289"]
[BlackElo "2107"]
[PlyCount "47"]
[EventDate "2006.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 113 Extra"]
[Source "ChessBase"]
[SourceDate "2006.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2006.09.14"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Bxf6 gxf6 10. Nd5 Bg7 11. Qh5 Ne7 12. Ne3 f5 13. exf5 e4 14. c3 d5 15. 0-0-0 Bb7 16. Qg5 Be5 17. Nac2 Qd6 18. g3 h5 19. Qh4 Rc8 20. Kb1 Qb6 21. Bg2 b4 22. Nxb4 d4 23. Qxe7+ Kxe7 24. Ned5+ 1-0

[Event "Vlissingen HZ op 10th"]
[Site "Vlissingen"]
[Date "2006.08.06"]
[Round "3"]
[White "Sonder, Peter"]
[Black "Lindenskov, Bjarne"]
[Result "1-0"]
[ECO "B21"]
[WhiteElo "2107"]
[PlyCount "33"]
[EventDate "2006.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 113 Extra"]
[Source "ChessBase"]
[SourceDate "2006.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2006.09.14"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 d6 6. Bc4 a6 7. Bg5 Qc7 8. Nd5 Qa5+ 9. Bd2 Qd8 10. Be3 Qa5+ 11. Kf1 e6 12. Bb6 exd5 13. Bxa5 dxc4 14. Bc3 Bg4 15. h3 Be6 16. Nd4 Nxd4 17. Bxd4 1-0

[Event "Bussum op"]
[Site "Bussum"]
[Date "2004.05.28"]
[Round "1"]
[White "Wustefeld, Emile"]
[Black "Sonder, Peter"]
[Result "1-0"]
[ECO "B26"]
[WhiteElo "2338"]
[BlackElo "2115"]
[PlyCount "61"]
[EventDate "2004.05.28"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 100 Extra"]
[Source "ChessBase"]
[SourceDate "2004.07.06"]
[SourceVersion "2"]
[SourceVersionDate "2004.07.06"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 e6 6. Be3 d6 7. Qd2 Nge7 8. Bh6 0-0 9. h4 Bxh6 10. Qxh6 f6 11. Qd2 e5 12. 0-0-0 Be6 13. f4 b5 14. h5 b4 15. Nd5 Bxd5 16. exd5 Nd4 17. hxg6 Nxg6 18. Nf3 Rb8 19. Nxd4 cxd4 20. Bh3 f5 21. Qh2 Qc7 22. fxe5 Nxe5 23. Rdf1 b3 24. axb3 Rxb3 25. Bxf5 Rxf5 26. Rxf5 Nxd3+ 27. Kd2 Qa5+ 28. Ke2 Nc1+ 29. Kd1 Rb7 30. Rg5+ Kh8 31. Qf2 1-0

[Event "Soest op"]
[Site "Soest"]
[Date "2000.06.04"]
[Round "6"]
[White "Sonder, Peter"]
[Black "Broekmeulen, Jasper"]
[Result "1/2-1/2"]
[ECO "B21"]
[PlyCount "100"]
[EventDate "2000.06.02"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 e6 5. Bc4 a6 6. Nf3 b5 7. Bb3 d6 8. 0-0 Ra7 9. Bg5 Be7 10. Qd4 Nc6 11. Qxg7 Bxg5 12. Qxh8 Kf8 13. Nxg5 Qxg5 14. Rad1 f6 15. Rxd6 Rg7 16. g3 Nce7 17. Rd8+ Kf7 18. Rfd1 Ng6 19. Qxg7+ Kxg7 20. Rxc8 b4 21. Ne2 N8e7 22. Nd4 Qe5 23. Nxe6+ Kh6 24. Rc5 Qxe4 25. Rd4 Qb1+ 26. Kg2 f5 27. Rxb4 Qxb2 28. Nf4 Qa3 29. Rcc4 a5 30. Ra4 Nxf4+ 31. Rxf4 Qc5 32. Rac4 Qd5+ 33. Kg1 Qe5 34. Rh4+ Kg7 35. Rcd4 Qe1+ 36. Kg2 Qc3 37. Rc4 Qe5 38. Rhd4 Ng6 39. h3 Kh6 40. Ra4 Qe2 41. Rd6 Qe7 42. Rad4 Qb7+ 43. Bd5 Qb5 44. Bc6 Qe5 45. Rh4+ Kg7 46. Rd7+ Ne7 47. Rhd4 Kf8 48. Rd8+ Kg7 49. R4d7 Kf6 50. Re8 Qc5 1/2-1/2

[Event "Soest op"]
[Site "Soest"]
[Date "2000.06.04"]
[Round "7"]
[White "Vermeulen, AG."]
[Black "Sonder, Peter"]
[Result "0-1"]
[ECO "B30"]
[PlyCount "51"]
[EventDate "2000.06.02"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. a3 g6 4. d4 cxd4 5. Nxd4 Bg7 6. Nxc6 bxc6 7. Nd2 e6 8. Nf3 d6 9. Bd3 Ne7 10. 0-0 0-0 11. Re1 Qc7 12. c3 Rb8 13. Bf4 Rxb2 14. Qc1 Qb6 15. Be3 c5 16. Nd2 Qb8 17. Nc4 Rb3 18. Bd2 Nc6 19. Bc2 Rb7 20. Ba4 Bd7 21. Bxc6 Bxc6 22. Na5 Rb6 23. Nxc6 Rxc6 24. Bh6 Rb6 25. Rd1 Qb7 26. h4 0-1

[Event "Soest op"]
[Site "Soest"]
[Date "2000.06.03"]
[Round "5"]
[White "Dgebuadze, Alexandre"]
[Black "Sonder, Peter"]
[Result "1-0"]
[ECO "B33"]
[WhiteElo "2540"]
[PlyCount "57"]
[EventDate "2000.06.02"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Bxf6 gxf6 10. Nd5 f5 11. exf5 Bxf5 12. c3 Bg7 13. Nc2 0-0 14. Nce3 Be6 15. g3 Rb8 16. Bg2 Qd7 17. Qh5 b4 18. g4 f5 19. gxf5 Bxf5 20. Nxf5 Qxf5 21. Qxf5 Rxf5 22. Ne3 Ne7 23. Nxf5 Nxf5 24. Be4 Ne7 25. c4 Rc8 26. b3 Nc6 27. Bxc6 Rxc6 28. Rd1 e4 29. Ke2 1-0

[Event "Soest op"]
[Site "Soest"]
[Date "2000.06.03"]
[Round "4"]
[White "Sonder, Peter"]
[Black "Van Sonderen, Paul"]
[Result "1-0"]
[ECO "C88"]
[PlyCount "43"]
[EventDate "2000.06.02"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 0-0 8. d4 Nxd4 9. Bxf7+ Rxf7 10. Nxe5 Nf3+ 11. Qxf3 Rf8 12. Qb3+ d5 13. exd5 Bd6 14. Bf4 Nh5 15. Bg3 Rf5 16. Nc6 Bxg3 17. hxg3 Qf6 18. Ne7+ Kh8 19. Nxf5 Bxf5 20. Nd2 Rf8 21. Nf3 Qb6 22. Qe3 1-0

[Event "Soest op"]
[Site "Soest"]
[Date "2000.06.02"]
[Round "2"]
[White "Sonder, Peter"]
[Black "Jongbloed, Ben"]
[Result "1-0"]
[ECO "B01"]
[PlyCount "73"]
[EventDate "2000.06.02"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Bc4 c6 6. Nf3 Bg4 7. h3 Bh5 8. Bd2 Qc7 9. Qe2 e6 10. 0-0 Bd6 11. Bg5 Nbd7 12. Rfe1 0-0 13. Rad1 Rfe8 14. g4 Bg6 15. Ne5 Nd5 16. Nxg6 hxg6 17. Ne4 b5 18. Bb3 a5 19. c3 N7f6 20. Bc2 Rab8 21. Qf3 Nxe4 22. Rxe4 c5 23. dxc5 Qxc5 24. Bb3 Nc7 25. Red4 Qxg5 26. Rxd6 a4 27. Rd7 f6 28. Rxc7 axb3 29. axb3 Red8 30. Qe2 Rxd1+ 31. Qxd1 f5 32. Qd6 fxg4 33. Qxe6+ Kh7 34. hxg4 Qc1+ 35. Kg2 Qf4 36. Rf7 Qg5 37. Rf3 1-0

[Event "Soest op"]
[Site "Soest"]
[Date "2000.06.02"]
[Round "1"]
[White "Van Run, Rieke"]
[Black "Sonder, Peter"]
[Result "1/2-1/2"]
[ECO "C45"]
[PlyCount "76"]
[EventDate "2000.06.02"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. Bc4 0-0 8. 0-0 Bb6 9. Na3 Re8 10. Ndb5 Ne5 11. Bd4 a6 12. Bxb6 axb5 13. Bd4 bxc4 14. f4 Qc6 15. fxe5 Qxe4 16. Nxc4 b5 17. Nd2 Qd5 18. Qf3 Bb7 19. a3 Ra6 20. Qxd5 Bxd5 21. Nf3 Ng6 22. Rae1 h6 23. Re3 Rae6 24. Rfe1 Ne7 25. Kf2 Nf5 26. R3e2 Bc4 27. Rd2 Bd5 28. Rde2 Ne7 29. Nd2 Ng6 30. g3 Ne7 31. Ne4 Bxe4 32. Rxe4 Nd5 33. R4e2 Kh7 34. Kf3 Rc8 35. Bc5 Rd8 36. Bd4 Kg6 37. h3 Ne7 38. g4 Nd5 1/2-1/2

