[Event "Haarlem AKN op 10th"]
[Site "Haarlem"]
[Date "2001.07.07"]
[Round "3"]
[White "Grondsma, Henk"]
[Black "Geerts, Alexander"]
[Result "0-1"]
[ECO "B23"]
[PlyCount "100"]
[EventDate "2001.07.06"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 c5 2. f4 Nc6 3. Nf3 e6 4. Nc3 d6 5. Bb5 Nge7 6. Bxc6+ Nxc6 7. d3 g6 8. 0-0 Bg7 9. Ne2 0-0 10. c3 b6 11. Rb1 Rb8 12. Be3 e5 13. Ng3 d5 14. fxe5 dxe4 15. Nxe4 Nxe5 16. Bf4 Bg4 17. Nf2 Bxf3 18. gxf3 Qd5 19. Ng4 Nxg4 20. Bxb8 Ne3 21. Qe2 Nxf1 22. Bf4 Qf5 23. Qe4 Nxh2 24. Bxh2 Qg5+ 25. Kf1 Qh5 26. Kg2 Qg5+ 27. Kf1 h5 28. Bd6 Rc8 29. Re1 h4 30. Qb7 Qf5 31. Kf2 Rd8 32. Be7 Rxd3 33. Bxh4 Rd2+ 34. Re2 Rxe2+ 35. Kxe2 Qc2+ 36. Kf1 Qc1+ 37. Be1 Qxb2 38. Qxa7 Bxc3 39. Bxc3 Qxc3 40. Qb8+ Kg7 41. Qxb6 Qxf3+ 42. Kg1 Qd1+ 43. Kf2 Qd2+ 44. Kf3 Qc3+ 45. Ke2 c4 46. a3 Qd3+ 47. Ke1 c3 48. Qc5 Qd2+ 49. Kf1 c2 50. Qe5+ Kh7 0-1

[Event "Haarlem AKN op 10th"]
[Site "Haarlem"]
[Date "2001.07.07"]
[Round "4"]
[White "Van der Marel, Eric J"]
[Black "Grondsma, Henk"]
[Result "1-0"]
[ECO "B14"]
[PlyCount "101"]
[EventDate "2001.07.06"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. e3 d5 6. a3 Bxc3+ 7. bxc3 cxd4 8. exd4 Qa5 9. Bd2 0-0 10. Bd3 dxc4 11. Bxc4 Qc7 12. Bd3 b6 13. 0-0 Bb7 14. Ne5 Nbd7 15. Nxd7 Qxd7 16. Qe2 Rac8 17. Rac1 Qd6 18. Rfe1 Nd5 19. g3 f5 20. c4 Nf6 21. Bb4 Qc6 22. d5 exd5 23. Bxf8 d4 24. f3 Kxf8 25. Bxf5 Re8 26. Qf2 Qc5 27. Be4 Bxe4 28. fxe4 Rxe4 29. Rf1 Qxa3 30. Rce1 Qe7 31. Rxe4 Qxe4 32. Rd1 d3 33. Qf4 Qxf4 34. gxf4 Nh5 35. Rxd3 Nxf4 36. Rd7 Ng6 37. Rxa7 Ne5 38. Rc7 g6 39. Kf2 h5 40. Ke3 Ng4+ 41. Kf4 Nxh2 42. Rb7 g5+ 43. Kxg5 Nf3+ 44. Kf6 Ke8 45. Ke6 Kd8 46. Kd6 Kc8 47. Rxb6 h4 48. c5 Nd2 49. Rb4 Nf3 50. c6 Ng5 51. Rf4 1-0

[Event "Haarlem AKN op 10th"]
[Site "Haarlem"]
[Date "2001.07.06"]
[Round "2"]
[White "Broersen, Sjors"]
[Black "Grondsma, Henk"]
[Result "0-1"]
[ECO "B14"]
[PlyCount "94"]
[EventDate "2001.07.06"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 e6 6. Bg5 Be7 7. Nf3 0-0 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. 0-0 Nxc3 12. bxc3 Qc7 13. Bd3 Nd7 14. c4 b6 15. Re1 h6 16. Rc1 Bb7 17. c5 Bxf3 18. Qxf3 Nf6 19. Bb5 Rad8 20. Red1 Rd5 21. Qg3 Qxg3 22. hxg3 Rfd8 23. Bc4 R5d7 24. c6 Rc7 25. Ba6 Rd6 26. Bb7 Nd5 27. Rc4 Ne7 28. Rdc1 Nf5 29. Kf1 Rxd4 30. Rxd4 Nxd4 31. Rc4 e5 32. f4 f6 33. Kf2 Kf7 34. Ke3 Nf5+ 35. Kd3 Nd6 36. Ra4 Nxb7 37. cxb7 Rxb7 38. Ke4 exf4 39. gxf4 Re7+ 40. Kd5 f5 41. Kd6 Kf6 42. Kc6 g5 43. g3 gxf4 44. Rxf4 Re4 45. Rf3 Ra4 46. a3 Kg5 47. Kd5 Kg4 0-1

[Event "Haarlem ACCOM op"]
[Site "Haarlem"]
[Date "1991.??.??"]
[Round "4"]
[White "Brugman, Nico"]
[Black "Grondsma, Henk"]
[Result "0-1"]
[ECO "E27"]
[PlyCount "73"]
[EventDate "1991.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 0-0 6. Bg5 c5 7. Qc2 cxd4 8. cxd4 Nc6 9. Nf3 Qa5+ 10. Bd2 Qc7 11. e3 d5 12. Bd3 Bd7 13. 0-0 dxc4 14. Bxc4 Rac8 15. Bd3 Qd8 16. Qb2 Na5 17. Rac1 Bc6 18. Rfe1 Bxf3 19. Rxc8 Qxc8 20. Bxa5 Bc6 21. e4 Qd7 22. Bc3 Ne8 23. Bb4 Nd6 24. e5 Nb5 25. Bxh7+ Kxh7 26. Bxf8 Qd5 27. f3 Nxd4 28. Qf2 Kg8 29. Bb4 Nf5 30. Qxa7 Nd4 31. Qc5 Nxf3+ 32. gxf3 Qxf3 33. Re2 Qxe2 34. Qf2 Qxe5 35. Qd2 Qa1+ 36. Kf2 Qf6+ 37. Kg3 0-1

[Event "Haarlem ACCOM op2"]
[Site "Haarlem"]
[Date "1987.??.??"]
[Round "7"]
[White "Ariese, Ruud"]
[Black "Grondsma, Henk"]
[Result "1-0"]
[ECO "B00"]
[PlyCount "33"]
[EventDate "1987.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 b6 2. Nc3 Bb7 3. d3 d6 4. f4 g6 5. Nf3 Bg7 6. Be3 Nf6 7. h3 0-0 8. g4 Nc6 9. Qd2 e5 10. f5 gxf5 11. gxf5 d5 12. Rg1 dxe4 13. Bh6 exf3 14. Bxg7 Qd4 15. Qf2 Rfe8 16. Bxf6+ Kf8 17. Rg8+ 1-0

[Event "Haarlem ACCOM op2"]
[Site "Haarlem"]
[Date "1987.??.??"]
[Round "6"]
[White "Grondsma, Henk"]
[Black "Kool, Gerard J"]
[Result "1-0"]
[ECO "B21"]
[PlyCount "60"]
[EventDate "1987.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 c5 2. f4 e6 3. Nf3 d6 4. Bb5+ Bd7 5. Bxd7+ Nxd7 6. 0-0 Ngf6 7. d3 g6 8. e5 Nd5 9. c4 Nc7 10. Nc3 Nb6 11. Ne4 dxe5 12. fxe5 Nd7 13. Nfg5 Nxe5 14. Qa4+ b5 15. cxb5 Qd4+ 16. Qxd4 cxd4 17. Bf4 Bg7 18. Bxe5 Bxe5 19. Nxf7 Bg7 20. Nxh8 Bxh8 21. Rac1 Nd5 22. Nd6+ Ke7 23. Rc6 Bf6 24. Ne4 Be5 25. Ng5 Nf4 26. g3 Nxd3 27. Rf7+ Ke8 28. Rxe6+ Kd8 29. Rf8+ Kd7 30. Rxa8 Nb4 1-0

[Event "Haarlem ACCOM op2"]
[Site "Haarlem"]
[Date "1987.??.??"]
[Round "2"]
[White "Grondsma, Henk"]
[Black "Kuyper, A."]
[Result "0-1"]
[ECO "C25"]
[PlyCount "106"]
[EventDate "1987.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 e5 2. Bc4 Nf6 3. Nc3 Bc5 4. Nge2 Nc6 5. 0-0 0-0 6. d3 d6 7. Na4 Bb6 8. Nxb6 axb6 9. f4 Bg4 10. c3 exf4 11. Bxf4 Nh5 12. d4 Qe7 13. Qc2 Kh8 14. Ng3 h6 15. Rae1 Nxf4 16. Rxf4 Be6 17. b3 Bxc4 18. bxc4 Ra5 19. Nf5 Qg5 20. Qd2 Rxa2 21. Qxa2 Qxf4 22. Qc2 g6 23. Rf1 Qg5 24. Ng3 Qe3+ 25. Kh1 Kg7 26. Rf3 Qe1+ 27. Nf1 Ra8 28. h3 Ra1 29. c5 bxc5 30. Qb3 Nd8 31. Qd5 cxd4 32. Qxd4+ Kg8 33. Qf6 Ra8 34. Kh2 Qxe4 35. Re3 Qc6 36. Re7 Ra5 37. Ne3 Rc5 38. Ng4 Rh5 39. Rxf7 Nxf7 40. Qxg6+ Kf8 41. Qxh5 Qxc3 42. Qb5 b6 43. Qf1 h5 44. Nh6 Qe5+ 45. Kh1 Qe6 46. Nxf7 Qxf7 47. Qb5 Ke7 48. Qg5+ Kd7 49. Qb5+ Kd8 50. Qg5+ Kc8 51. Qb5 Kb7 52. Kg1 c6 53. Qd3 d5 0-1

[Event "Haarlem ACCOM op2"]
[Site "Haarlem"]
[Date "1987.??.??"]
[Round "5"]
[White "Schuit, Adrie"]
[Black "Grondsma, Henk"]
[Result "1-0"]
[ECO "B12"]
[PlyCount "59"]
[EventDate "1987.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nd2 Qb6 4. Ngf3 Bg4 5. c3 Nd7 6. Qc2 e6 7. Bd3 Ne7 8. 0-0 c5 9. exd5 Nxd5 10. Nc4 Qd8 11. Nce5 Bxf3 12. Nxf3 Rc8 13. Re1 cxd4 14. Nxd4 Bc5 15. Nb3 Bb6 16. Be4 N7f6 17. Bg5 Qc7 18. Rad1 Kf8 19. Bf3 Nb4 20. Qd2 Rd8 21. Qxd8+ Qxd8 22. Rxd8+ Bxd8 23. cxb4 h6 24. Be3 b6 25. Bc6 Be7 26. Rd1 Ng4 27. Rd7 Ne5 28. Rxa7 Nxc6 29. Ra8+ Bd8 30. Rc8 1-0

[Event "Haarlem ACCOM op2"]
[Site "Haarlem"]
[Date "1987.??.??"]
[Round "1"]
[White "Zweers, T."]
[Black "Grondsma, Henk"]
[Result "1-0"]
[ECO "E11"]
[PlyCount "127"]
[EventDate "1987.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bd2 0-0 5. Nf3 c5 6. dxc5 Bxc5 7. e3 Nc6 8. a3 a6 9. Be2 d5 10. b4 Ba7 11. cxd5 exd5 12. 0-0 Re8 13. Rc1 Bd7 14. Qb3 d4 15. exd4 Nxd4 16. Nxd4 Bxd4 17. Bf3 Be6 18. Qb1 Bc4 19. Rfd1 Bd3 20. Qb3 Re6 21. Be1 Qe8 22. Nd5 Nxd5 23. Qxd3 Bb2 24. Rb1 Nf4 25. Qb3 Bf6 26. Bxb7 Ra7 27. Qf3 Be5 28. Bc6 Qe7 29. g3 Nh3+ 30. Kf1 Rc7 31. Bd5 Rf6 32. Qg4 Nxf2 33. Bxf2 Rc2 34. Kg1 Rfxf2 35. Rbc1 Rg2+ 36. Bxg2 Qa7+ 37. Kh1 Rxc1 38. Rxc1 g6 39. Rf1 Kg7 40. Bd5 f6 41. Qe6 Kh6 42. Qh3+ Kg7 43. Qg2 Qe3 44. Qf3 Qh6 45. Re1 Qd2 46. Rd1 Qg5 47. Bc4 h5 48. Rd7+ Kh6 49. Bxa6 Qc1+ 50. Kg2 Qb2+ 51. Qf2 Qxa3 52. Be2 Qxb4 53. Rd8 Qe4+ 54. Bf3 Qa4 55. Rd2 Qe8 56. Re2 Qf7 57. Be4 Qc4 58. Qe3+ Kg7 59. Rd2 Qa4 60. Qd3 Qb4 61. Bxg6 h4 62. Bf5 Qb7+ 63. Be4 h3+ 64. Kh1 1-0

[Event "Alkmaar ACCOM op-A"]
[Site "Alkmaar"]
[Date "1985.??.??"]
[Round "3"]
[White "Grondsma, Henk"]
[Black "Adema, Ruud"]
[Result "0-1"]
[ECO "B12"]
[PlyCount "80"]
[EventDate "1985.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nf3 e6 5. Bd3 Bxd3 6. Qxd3 f6 7. 0-0 Nd7 8. c4 f5 9. Ng5 Qe7 10. cxd5 cxd5 11. Nc3 a6 12. b4 h6 13. Qh3 g6 14. Bd2 Bg7 15. Nf3 g5 16. g4 f4 17. Rfc1 Nb6 18. Qf1 Qf7 19. Ne1 Ne7 20. Nd3 Nc6 21. f3 Nc4 22. Qf2 Nxd2 23. Qxd2 Nxd4 24. Kg2 Nc6 25. Qe2 0-0 26. Na4 Rfe8 27. Rc3 Rad8 28. Nac5 Qc7 29. Nxa6 bxa6 30. Qc2 Nxb4 31. Nxb4 Qxe5 32. Rc1 Qxc3 33. Qxc3 Bxc3 34. Rxc3 Rb8 35. a3 a5 36. Nd3 Rec8 37. Rc5 Rxc5 38. Nxc5 Rb2+ 39. Kg1 Kf7 40. a4 Ke7 0-1

[Event "Alkmaar ACCOM op-A"]
[Site "Alkmaar"]
[Date "1985.??.??"]
[Round "1"]
[White "Grondsma, Henk"]
[Black "Tromp, Andreas"]
[Result "0-1"]
[ECO "C32"]
[PlyCount "50"]
[EventDate "1985.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. c4 Bc5 6. dxe4 Nxe4 7. Qe2 0-0 8. Nd2 Qh4+ 9. g3 Nxg3 10. Ndf3 Nxe2+ 11. Nxh4 Nxg1 12. Bd2 Bg4 13. Bc3 Nf3+ 14. Nxf3 Bxf3 15. b4 Be3 16. Bh3 Bxh1 17. Ke2 Bxd5 18. Kxe3 Bxc4 19. Rg1 g6 20. f5 Nc6 21. b5 Bxb5 22. fxg6 Rfe8+ 23. Kf4 fxg6 24. Bf6 Kf7 25. Bg5 Nd4 0-1

[Event "Alkmaar ACCOM op-A"]
[Site "Alkmaar"]
[Date "1985.??.??"]
[Round "5"]
[White "Grondsma, Henk"]
[Black "Van Diepen, Peter"]
[Result "0-1"]
[ECO "C02"]
[PlyCount "148"]
[EventDate "1985.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Qb6 5. Nf3 Bd7 6. Be2 Bb5 7. 0-0 Bxe2 8. Qxe2 Nd7 9. Be3 c4 10. Qc2 Ne7 11. Nh4 Nc6 12. f4 g6 13. Nd2 Bh6 14. Rf3 0-0-0 15. b3 cxb3 16. Nxb3 Na5 17. Nxa5 Qxa5 18. c4 dxc4 19. Qxc4+ Kb8 20. Rb1 Nb6 21. Qb3 Rc8 22. d5 Qxd5 23. Bxb6 axb6 24. Qxb6 Qc5+ 25. Qxc5 Rxc5 26. g3 Rhc8 27. Rb2 Rc1+ 28. Kg2 Bf8 29. Rfb3 R8c7 30. Nf3 h6 31. Nd4 Bc5 32. Nb5 Rd7 33. Kh3 Rcd1 34. Nc3 R1d4 35. Nb5 Rd2 36. Kg4 b6 37. Nd6 Rd4 38. Rc2 Ka8 39. Nb5 Rd1 40. h4 h5+ 41. Kg5 Be7+ 42. Kh6 Bf8+ 43. Kg5 Be7+ 44. Kh6 Rd8 45. Kg7 R1d7 46. Kxf7 Bxh4+ 47. Kxg6 Rg8+ 48. Kh6 Rh8+ 49. Kg6 Rg8+ 50. Kh6 Bxg3 51. Nc7+ Kb7 52. Nxe6 Re7 53. Nd8+ Ka6 54. Ra3+ Kb5 55. Rb2+ Kc4 56. Rc2+ Kd5 57. Rd3+ Ke4 58. Rxg3 Rxg3 59. Rc6 Re8 60. Nf7 Rf8 61. Rg6 Rxg6+ 62. Kxg6 h4 63. e6 Kd5 64. f5 h3 65. e7 Re8 66. f6 h2 67. Ng5 h1Q 68. f7 Qb1+ 69. Kh5 Rh8+ 70. Kg4 Qg1+ 71. Kf5 Qf2+ 72. Kg6 Qc2+ 73. Kf6 Rh6+ 74. Kg7 Qg6+ 0-1

[Event "Alkmaar ACCOM op-A"]
[Site "Alkmaar"]
[Date "1985.??.??"]
[Round "6"]
[White "Kool, Gerard J"]
[Black "Grondsma, Henk"]
[Result "1-0"]
[ECO "B18"]
[PlyCount "59"]
[EventDate "1985.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Nf3 e6 7. Ne5 Bd6 8. Bf4 Qc7 9. Nxg6 hxg6 10. Bxd6 Qxd6 11. Qd2 Nf6 12. 0-0-0 Nbd7 13. Be2 0-0-0 14. h3 Qd5 15. Kb1 Qxg2 16. Bf1 Qf3 17. Rg1 Ne4 18. Nxe4 Qxe4 19. Rg4 Qd5 20. Rf4 Qh5 21. Rxf7 Rdf8 22. Rxf8+ Rxf8 23. Re1 Nb6 24. Qe3 Rf6 25. b3 Nd5 26. Qg3 Qh6 27. Re2 Qh5 28. Kb2 Nf4 29. Re4 Qf5 30. Re5 1-0

[Event "Alkmaar ACCOM op-A"]
[Site "Alkmaar"]
[Date "1985.??.??"]
[Round "4"]
[White "Van der Berg, A."]
[Black "Grondsma, Henk"]
[Result "0-1"]
[ECO "D45"]
[PlyCount "104"]
[EventDate "1985.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 c6 2. c4 d5 3. Nf3 Nf6 4. e3 e6 5. Bd3 Be7 6. 0-0 0-0 7. Nc3 h6 8. Qc2 dxc4 9. Bxc4 b5 10. Bd3 Bb7 11. Rd1 Na6 12. a3 Nc7 13. Ne4 Nxe4 14. Bxe4 Rc8 15. b4 Nd5 16. Bb2 f5 17. Bd3 Bd6 18. Rac1 a5 19. bxa5 Qxa5 20. Qb3 Ra8 21. Ne5 Qa4 22. Qxa4 Rxa4 23. Nd7 Rd8 24. Nc5 Bxc5 25. Rxc5 Rda8 26. Bc2 R4a7 27. Bb3 Ra6 28. Rdc1 Rb6 29. h3 Kf7 30. Kh2 g6 31. Re1 Rba6 32. Rec1 Nb6 33. Re5 Re8 34. Rec5 Na4 35. Bxa4 Rxa4 36. Kg3 Rea8 37. f3 b4 38. axb4 Rxb4 39. Bc3 Rb5 40. Be1 Rb2 41. R1c2 Rb3 42. R2c3 Rb1 43. Rc1 Rba1 44. Rxa1 Rxa1 45. Bc3 Ra3 46. e4 Kf6 47. d5+ Ke7 48. dxc6 Bc8 49. exf5 exf5 50. Bb4 Ra4 51. Rb5+ Kd8 52. Ba5+ Ke7 0-1

[Event "Alkmaar op-A"]
[Site "Alkmaar"]
[Date "1983.??.??"]
[Round "?"]
[White "Boots, Arie"]
[Black "Grondsma, Henk"]
[Result "0-1"]
[ECO "E27"]
[PlyCount "43"]
[EventDate "1983.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 0-0 6. Bg5 h6 7. Bh4 d5 8. e3 Nbd7 9. cxd5 exd5 10. h3 c6 11. Bd3 Re8 12. Ne2 Qa5 13. 0-0 Ne4 14. Qc2 Ndf6 15. f3 Ng5 16. Bxg5 hxg5 17. e4 dxe4 18. fxe4 c5 19. d5 c4 20. Qd2 cxd3 21. Qxg5 dxe2 22. Rxf6 0-1

[Event "Alkmaar op-A"]
[Site "Alkmaar"]
[Date "1983.??.??"]
[Round "?"]
[White "De Jong, Huib"]
[Black "Grondsma, Henk"]
[Result "1-0"]
[ECO "A13"]
[PlyCount "59"]
[EventDate "1983.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. c4 Nf6 2. Nf3 e6 3. g3 c6 4. Bg2 d5 5. 0-0 Bd6 6. d3 e5 7. Qc2 d4 8. c5 Bc7 9. e3 0-0 10. Nbd2 Bf5 11. exd4 exd4 12. Nb3 Re8 13. Nbxd4 Bg6 14. Rd1 Nd5 15. a3 Nd7 16. b4 Ne5 17. Bb2 Qf6 18. Rd2 Rad8 19. Ne1 b5 20. cxb6 Bxb6 21. Ndf3 Nxf3+ 22. Nxf3 Qd6 23. Nh4 Rd7 24. Nxg6 fxg6 25. Qc4 Rf7 26. Rc1 Rxf2 27. Rxf2 Rf8 28. Bd4 Bxd4 29. Qxd4 Rxf2 30. Bxd5+ 1-0

[Event "Alkmaar op-A"]
[Site "Alkmaar"]
[Date "1983.??.??"]
[Round "?"]
[White "Grondsma, Henk"]
[Black "Brugman, Nico"]
[Result "0-1"]
[ECO "D53"]
[PlyCount "94"]
[EventDate "1983.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. e3 Nc6 6. c5 0-0 7. a3 a6 8. Bd3 e5 9. dxe5 Nxe5 10. b4 c6 11. Nge2 Re8 12. 0-0 Nfd7 13. Bxe7 Qxe7 14. Nd4 Nf6 15. Qc2 Nxd3 16. Qxd3 Ng4 17. Qe2 Ne5 18. h3 Qf6 19. Nd1 Qg6 20. f4 Nd7 21. g4 Qf6 22. Ra2 Nf8 23. g5 Qe7 24. Qf3 Bd7 25. Re1 Ng6 26. Nc3 Nh4 27. Qg3 Nf5 28. Nxf5 Bxf5 29. Rd2 Rad8 30. Ree2 Qc7 31. h4 b6 32. cxb6 Qxb6 33. Na4 Qa7 34. Nc5 a5 35. Ra2 d4 36. exd4 Rxe2 37. Rxe2 axb4 38. Qe3 Kf8 39. d5 Qa8 40. Qe7+ Kg8 41. d6 bxa3 42. Ra2 Re8 43. Rxa3 Qb8 44. Qb7 Qxd6 45. Ra8 Qxc5+ 46. Kh2 Qf2+ 47. Kh1 Be4# 0-1

[Event "Alkmaar op-A"]
[Site "Alkmaar"]
[Date "1983.??.??"]
[Round "?"]
[White "Grondsma, Henk"]
[Black "Verhagen, Ad"]
[Result "1-0"]
[ECO "D25"]
[PlyCount "131"]
[EventDate "1983.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. e3 Bg4 4. c4 dxc4 5. Bxc4 e6 6. Qa4+ c6 7. Be2 Nbd7 8. 0-0 Nb6 9. Qc2 Be7 10. h3 Bf5 11. Bd3 Bxd3 12. Qxd3 0-0 13. Nc3 Qc7 14. b3 Qd8 15. Qc2 Qc7 16. Bb2 Rac8 17. Rac1 Nbd5 18. Nxd5 exd5 19. Ne5 Bd6 20. Qf5 Rce8 21. Rc2 Re6 22. g4 Ne4 23. g5 Bxe5 24. dxe5 Nxg5 25. f3 Rg6 26. Kh1 Nxh3 27. f4 Qe7 28. Rh2 Ng5 29. fxg5 Qxg5 30. Qh3 Rh6 31. Qxh6 gxh6 32. Rg1 Kg7 33. Rxg5+ hxg5 34. e6+ f6 35. e7 Re8 36. Rf2 h6 37. Kg2 c5 38. Kg3 d4 39. exd4 Rxe7 40. dxc5 Re6 41. Rd2 Kg6 42. Rd7 Re3+ 43. Kf2 Rh3 44. Kg2 Re3 45. Bc1 Re2+ 46. Kf3 Rc2 47. Be3 Rxa2 48. Rxb7 h5 49. c6 Rc2 50. c7 h4 51. Bxa7 h3 52. Bg1 Rc3+ 53. Kf2 Rc2+ 54. Kg3 Rc3+ 55. Kf2 Rc2+ 56. Kg3 Rc3+ 57. Kh2 g4 58. b4 f5 59. Bc5 Rc2+ 60. Kg3 Rc3+ 61. Kf4 Rc4+ 62. Ke5 Re4+ 63. Kd5 h2 64. c8Q h1Q 65. Qg8+ Kf6 66. Rf7# 1-0

[Event "Alkmaar op-A"]
[Site "Alkmaar"]
[Date "1983.??.??"]
[Round "?"]
[White "Grondsma, Henk"]
[Black "Zaal, R."]
[Result "1-0"]
[ECO "D12"]
[PlyCount "59"]
[EventDate "1983.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. e3 Bf5 4. c4 c6 5. c5 Nbd7 6. b4 Qc7 7. Bb2 e6 8. Be2 Be7 9. 0-0 0-0 10. Ne5 Nxe5 11. dxe5 Nd7 12. f4 b6 13. cxb6 Qxb6 14. Bd4 Qxb4 15. a3 Qa5 16. Nd2 c5 17. Bb2 Rab8 18. Ra2 Nb6 19. g4 Be4 20. Nxe4 dxe4 21. Qc2 Nd5 22. Qxe4 Qd2 23. Bd3 Qxe3+ 24. Qxe3 Nxe3 25. Rf3 Nd5 26. Be4 Rfd8 27. f5 exf5 28. gxf5 Bg5 29. Ba1 Rb1+ 30. Bxb1 1-0

[Event "Alkmaar op-A"]
[Site "Alkmaar"]
[Date "1983.??.??"]
[Round "?"]
[White "Van Egmond, Joost"]
[Black "Grondsma, Henk"]
[Result "1-0"]
[ECO "B09"]
[PlyCount "111"]
[EventDate "1983.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 Bg4 6. Be3 0-0 7. h3 Bxf3 8. Qxf3 c6 9. e5 dxe5 10. dxe5 Ne8 11. Bc4 Nc7 12. 0-0 e6 13. Rad1 Nd5 14. Ne4 Nd7 15. Bf2 a5 16. Nc5 Nxc5 17. Bxc5 Re8 18. Bxd5 cxd5 19. Bd4 Qc7 20. Rd2 Rac8 21. g4 Rf8 22. Re2 Qc4 23. Qd3 Qxd3 24. cxd3 Rc6 25. b4 axb4 26. Rb2 Rb8 27. Rxb4 Bf8 28. Rb3 Ra6 29. Rf2 Ra4 30. Be3 Ba3 31. Rc2 b5 32. Kg2 b4 33. Bc5 Rc8 34. d4 Ra6 35. Kf3 Rcc6 36. Ke2 Ra4 37. Kd1 Rc8 38. Rf2 Rb8 39. f5 gxf5 40. gxf5 exf5 41. Rg3+ Kh8 42. Rxf5 Rg8 43. Rxg8+ Kxg8 44. Rg5+ Kh8 45. Be7 h6 46. Bf6+ Kh7 47. Rg7+ Kh8 48. Rxf7+ Kg8 49. Rd7 Bb2 50. e6 Rxa2 51. Rd8+ Kh7 52. e7 Ra1+ 53. Ke2 Bc3 54. Bh4 b3 55. e8Q b2 56. Qg8# 1-0

[Event "Alkmaar op-C"]
[Site "Alkmaar"]
[Date "1982.??.??"]
[Round "?"]
[White "Bosma, Bartele"]
[Black "Grondsma, Henk"]
[Result "0-1"]
[ECO "B56"]
[PlyCount "40"]
[EventDate "1982.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 e5 5. Nb3 Nf6 6. Nc3 Be6 7. Be3 Nc6 8. Bd3 Be7 9. Qe2 0-0 10. 0-0-0 a6 11. h3 Rc8 12. f4 Bxb3 13. axb3 exf4 14. Bxf4 Qa5 15. Qd2 Nb4 16. Na4 b5 17. c3 bxa4 18. Bc4 axb3 19. Qd4 Qa1+ 20. Kd2 Qxb2+ 0-1

[Event "Alkmaar op-C"]
[Site "Alkmaar"]
[Date "1982.??.??"]
[Round "?"]
[White "Grondsma, Henk"]
[Black "Beerendonk, A."]
[Result "1-0"]
[ECO "E60"]
[PlyCount "41"]
[EventDate "1982.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. b4 d6 4. e3 Bg7 5. Nf3 0-0 6. Bd3 Nbd7 7. b5 e5 8. Qc2 Re8 9. Nc3 exd4 10. Nxd4 Nc5 11. 0-0 Nxd3 12. Qxd3 Be6 13. Nce2 Nh5 14. f4 a6 15. Bb2 axb5 16. Nxe6 Rxe6 17. Bxg7 bxc4 18. Qxc4 Kxg7 19. f5 d5 20. Qd4+ Rf6 21. g4 1-0

[Event "Alkmaar op-C"]
[Site "Alkmaar"]
[Date "1982.??.??"]
[Round "?"]
[White "Grondsma, Henk"]
[Black "De Groot, Pieter"]
[Result "1-0"]
[ECO "C32"]
[PlyCount "49"]
[EventDate "1982.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e5 2. f4 d5 3. exd5 e4 4. Bc4 Nf6 5. Ne2 c6 6. dxc6 Nxc6 7. 0-0 Bc5+ 8. Kh1 Ng4 9. Qe1 Qb6 10. d4 Bxd4 11. Nxd4 Qxd4 12. Bb3 e3 13. Qe2 0-0 14. Rf3 Nf2+ 15. Kg1 Bg4 16. Bxe3 Bxf3 17. Qxf2 Qd1+ 18. Qf1 Qxf1+ 19. Kxf1 Rfe8 20. Bf2 Be2+ 21. Kg1 Rad8 22. Nc3 a6 23. Bb6 Rd6 24. Re1 Ne7 25. Bc5 1-0

[Event "Alkmaar op-C"]
[Site "Alkmaar"]
[Date "1982.??.??"]
[Round "?"]
[White "Grondsma, Henk"]
[Black "Van der Bruinhorst, G."]
[Result "0-1"]
[ECO "C34"]
[PlyCount "76"]
[EventDate "1982.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e5 2. f4 exf4 3. Nf3 h6 4. Bc4 d6 5. 0-0 Be6 6. Bxe6 fxe6 7. d4 g5 8. c4 Qd7 9. e5 Nc6 10. exd6 Qxd6 11. d5 exd5 12. cxd5 0-0-0 13. Nc3 Nce7 14. Kh1 Bg7 15. Nd4 Nxd5 16. Nf5 Qd7 17. Nxg7 Nxc3 18. Qxd7+ Rxd7 19. bxc3 Rxg7 20. c4 Rf7 21. Re1 Ne7 22. Bb2 Rg8 23. Re6 Nf5 24. Rae1 Kd7 25. c5 Re7 26. Rxe7+ Nxe7 27. Bf6 Nd5 28. Rd1 Kc6 29. Bd4 Re8 30. Bg7 h5 31. Bh6 g4 32. Rf1 Kxc5 33. Kg1 Re4 34. Bg5 Kd4 35. Bh4 Re2 36. Rd1+ Ke4 37. Kf1 Rxa2 38. Bf2 Ne3+ 0-1

