[Event "NED-chT 0001"]
[Site "Netherlands"]
[Date "2001.04.22"]
[Round "9.9"]
[White "Van der Heijden, Coen"]
[Black "Kerkhoff, Leo"]
[Result "1-0"]
[ECO "C57"]
[BlackElo "2260"]
[PlyCount "49"]
[EventDate "2000.11.18"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]
[WhiteTeam "Magnus/BSG Bussum"]
[BlackTeam "Rotterdam SO"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 b5 6. Bf1 Nd4 7. c3 Nxd5 8. Ne4 Qh4 9. Ng3 Nc6 10. Bxb5 Bb7 11. 0-0 0-0-0 12. Re1 Nf4 13. Qa4 Nxg2 14. Re4 Nf4 15. Bxc6 Bxc6 16. Qxc6 Qg4 17. Qa6+ Kb8 18. d4 Rd6 19. Qb5+ Rb6 20. Qe8+ Kb7 21. Qxe5 Bd6 22. Qd5+ c6 23. Qxf7+ Ka8 24. Bxf4 Qd1+ 25. Kg2 1-0

[Event "NED-chT 0001"]
[Site "Netherlands"]
[Date "2001.03.04"]
[Round "6.10"]
[White "Kerkhoff, Leo"]
[Black "Duijn, Richard"]
[Result "0-1"]
[ECO "B83"]
[WhiteElo "2260"]
[BlackElo "2241"]
[PlyCount "58"]
[EventDate "2000.11.18"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]
[WhiteTeam "Rotterdam SO"]
[BlackTeam "Amstelveen Zukertort"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nxc6 bxc6 7. Bd3 d6 8. 0-0 Be7 9. b3 0-0 10. Bb2 Bg4 11. Be2 Be6 12. Qd3 Nd7 13. Na4 Qc7 14. c4 f5 15. Bf3 f4 16. c5 dxc5 17. Qc3 c4 18. bxc4 Rab8 19. Bd1 f3 20. gxf3 Bh3 21. c5 Bxf1 22. Kxf1 Kh8 23. Bb3 Rbe8 24. Rd1 Bg5 25. Rd6 Nb8 26. Be6 Bf4 27. Qd3 Bxh2 28. Nc3 Qb7 29. Bb3 Qe7 0-1

[Event "NED-chT 0001"]
[Site "Netherlands"]
[Date "2001.03.03"]
[Round "5.8"]
[White "Sielecki, Christof"]
[Black "Kerkhoff, Leo"]
[Result "1/2-1/2"]
[ECO "A30"]
[WhiteElo "2410"]
[BlackElo "2260"]
[PlyCount "93"]
[EventDate "2000.11.18"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]
[WhiteTeam "ING/ESGOO Enschede"]
[BlackTeam "Rotterdam SO"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. Nf3 Nf6 2. g3 g6 3. b3 Bg7 4. Bb2 0-0 5. Bg2 c5 6. c4 Nc6 7. 0-0 a6 8. d4 cxd4 9. Nxd4 Nxd4 10. Qxd4 Ne8 11. Qd2 Bxb2 12. Qxb2 Qa5 13. Nc3 Nc7 14. Rfd1 d6 15. Nd5 Nxd5 16. Rxd5 Qc7 17. c5 dxc5 18. Qe5 Qxe5 19. Rxe5 Be6 20. Bxb7 Ra7 21. Bd5 Bxd5 22. Rxd5 Rc8 23. Rc1 Rac7 24. Rc4 a5 25. Kf1 Kf8 26. Ke1 Ke8 27. Ra4 Ra8 28. Rh4 h5 29. g4 e6 30. Rd1 Ke7 31. gxh5 Rh8 32. h6 g5 33. Rh5 Kf6 34. h4 gxh4 35. Rxh4 Kg5 36. Rh3 Rxh6 37. Rxh6 Kxh6 38. Rc1 Kg6 39. Kd2 Kf6 40. Kd3 Ke5 41. Kc4 Kd6 42. Rd1+ Kc6 43. Rd8 a4 44. e4 axb3 45. axb3 Ra7 46. Rf8 Rd7 47. Rb8 1/2-1/2

[Event "NED-chT 0001"]
[Site "Netherlands"]
[Date "2001.01.06"]
[Round "3.9"]
[White "Kerkhoff, Leo"]
[Black "Kuijf, Marinus"]
[Result "1/2-1/2"]
[ECO "C02"]
[WhiteElo "2260"]
[BlackElo "2453"]
[PlyCount "79"]
[EventDate "2000.11.18"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]
[WhiteTeam "Rotterdam SO"]
[BlackTeam "Ordina Breda"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. a3 c4 7. Nbd2 Na5 8. g3 f5 9. exf6 Nxf6 10. Bh3 Bd6 11. 0-0 0-0 12. Re1 Bc7 13. Ne5 Bxe5 14. dxe5 Nd7 15. Nf3 Nb3 16. Be3 Ndc5 17. Rb1 Qc7 18. Bxc5 Nxc5 19. Nd4 Qe7 20. f4 Bd7 21. Bg2 Rad8 22. h4 a6 23. Qg4 Kh8 24. Re3 b5 25. Rf1 a5 26. Qg5 Qe8 27. h5 Bc8 28. f5 h6 29. Qh4 exf5 30. e6 Nxe6 31. Nxe6 Bxe6 32. Rfe1 Rd6 33. Bxd5 Rxd5 34. Rxe6 Qc8 35. Qf4 Qc5+ 36. Kf1 Rd7 37. R1e5 Qc7 38. Rxb5 Rd1+ 39. Ke2 Qd7 40. Rxh6+ 1/2-1/2

[Event "NED-chT 9900"]
[Site "Netherlands"]
[Date "2000.05.20"]
[Round "9"]
[White "Douven, Rudy C"]
[Black "Kerkhoff, Leo"]
[Result "1-0"]
[ECO "E94"]
[WhiteElo "2389"]
[BlackElo "2265"]
[PlyCount "70"]
[EventDate "2000.02.05"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 076 Extra"]
[Source "ChessBase"]
[SourceDate "2000.07.11"]
[SourceVersion "1"]
[SourceVersionDate "2000.07.11"]
[SourceQuality "1"]
[WhiteTeam "Hilversum HSG"]
[BlackTeam "Rotterdam"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 0-0 5. e4 d6 6. Be2 e5 7. 0-0 c6 8. dxe5 dxe5 9. Qxd8 Rxd8 10. Nxe5 Nxe4 11. Nxe4 Bxe5 12. Bg5 Rf8 13. Rad1 Kg7 14. Bc1 f5 15. f4 Bc7 16. Nd6 Na6 17. b3 Bxd6 18. Rxd6 Re8 19. Bb2+ Kf7 20. Be5 Be6 21. Rfd1 Nc5 22. Bf3 Re7 23. Bd4 Nd7 24. h3 Nf6 25. Bc3 Rd7 26. Rxd7+ Nxd7 27. g4 Nf6 28. g5 Ne4 29. Be5 Ke7 30. Rd3 a5 31. a4 Bd7 32. Bc7 b5 33. cxb5 cxb5 34. axb5 Bxb5 35. Rd5 Bc6 1-0

[Event "Rheinhausen-ch 3rd"]
[Site "Rheinhausen"]
[Date "1999.??.??"]
[Round "?"]
[White "Kerkhoff, Leo"]
[Black "Reisloh, Carsten"]
[Result "1-0"]
[ECO "C62"]
[WhiteElo "2265"]
[PlyCount "117"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. h3 Nf6 5. d3 Be7 6. c3 0-0 7. 0-0 Bd7 8. Ba4 Qe8 9. Bc2 d5 10. exd5 Nxd5 11. Re1 Bd6 12. d4 Nb6 13. c4 Bb4 14. Nc3 f6 15. c5 Bxc3 16. bxc3 Nc8 17. dxe5 Nxe5 18. Nxe5 fxe5 19. Qd5+ Qe6 20. Qxb7 Qf6 21. Re2 Qc6 22. Qb1 Qxc5 23. Bxh7+ Kh8 24. Bd3 Nd6 25. Qc2 Bf5 26. Be3 Qd5 27. Bxf5 Nxf5 28. c4 Qc6 29. Rd1 a6 30. Qc3 Rae8 31. Rd5 Nxe3 32. Rxe3 Rf5 33. Qd3 Qf6 34. Qe2 Qg5 35. Rd7 Rc8 36. Rg3 Qc1+ 37. Rd1 Qf4 38. Rf3 Qg5 39. Rxf5 Qxf5 40. Rd5 Re8 41. c5 Qe6 42. Rd2 g6 43. Qe4 Kg7 44. c6 Re7 45. Qa4 Qc8 46. Qe4 Qe6 47. Re2 Kf6 48. Qh4+ Kg7 49. Qa4 Qc8 50. f4 Kf6 51. fxe5+ Rxe5 52. Rf2+ Rf5 53. Qd4+ Kf7 54. Rd2 Kg8 55. Qd7 Qb8 56. Qe6+ Kg7 57. Rd7+ Kh6 58. Qe3+ Kh5 59. Rh7# 1-0

[Event "Rheinhausen-ch 3rd"]
[Site "Rheinhausen"]
[Date "1999.??.??"]
[Round "?"]
[White "Kerkhoff, Leo"]
[Black "Weyandt, Manfred"]
[Result "0-1"]
[ECO "B01"]
[WhiteElo "2265"]
[PlyCount "34"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. h3 Bf5 5. Nf3 Nf6 6. d3 h6 7. Be2 Nbd7 8. a3 e6 9. Be3 c5 10. Qd2 Be7 11. d4 a6 12. Bd3 Bxd3 13. Qxd3 Rc8 14. Nd2 cxd4 15. Nb3 Nc5 16. Nxc5 Bxc5 17. Bxd4 Rd8 0-1

[Event "Rheinhausen-ch 3rd"]
[Site "Rheinhausen"]
[Date "1999.??.??"]
[Round "?"]
[White "Schanzenbach, Heiko"]
[Black "Kerkhoff, Leo"]
[Result "1-0"]
[ECO "C68"]
[BlackElo "2265"]
[PlyCount "87"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. 0-0 Bg4 6. h3 Bxf3 7. Qxf3 Bd6 8. d3 h6 9. Be3 Nf6 10. Nd2 Qd7 11. c3 c5 12. Rfd1 0-0 13. Bxh6 gxh6 14. Qxf6 Kh7 15. Nf3 Rae8 16. Nh4 Re6 17. Qf3 Rg8 18. Nf5 Reg6 19. g3 Qe6 20. Kh1 Qf6 21. h4 Rg4 22. Qe3 R4g6 23. Rg1 Qe6 24. b3 Rg4 25. Rg2 R4g6 26. Rag1 Rg4 27. Qe2 Qf6 28. f3 R4g6 29. g4 Qe6 30. g5 Bf8 31. d4 cxd4 32. cxd4 f6 33. Qe3 b6 34. gxh6 Rxg2 35. Rxg2 exd4 36. Qxd4 Rxg2 37. Kxg2 Kg6 38. Qe3 Qg8 39. Kh2 Qh7 40. Qg1+ Kf7 41. Qc1 Kg6 42. h5+ Kxh5 43. Qg1 Qg6 44. h7 1-0

[Event "Rheinhausen-ch 3rd"]
[Site "Rheinhausen"]
[Date "1999.??.??"]
[Round "?"]
[White "Stempel, Markus"]
[Black "Kerkhoff, Leo"]
[Result "1-0"]
[ECO "A85"]
[BlackElo "2265"]
[PlyCount "88"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 e6 4. Nf3 f5 5. e3 Nf6 6. Bd3 Bd6 7. 0-0 Nbd7 8. b3 Nf8 9. a4 Ng6 10. Ba3 Ne4 11. Qc2 0-0 12. Bxd6 Qxd6 13. Nd2 Qe7 14. f3 Nxd2 15. Qxd2 Qf6 16. Bc2 Bd7 17. e4 Ne7 18. a5 a6 19. Na4 Rab8 20. Nc5 Be8 21. Rad1 f4 22. Qb4 Qf7 23. Nxa6 Rd8 24. Qxb7 Bd7 25. Qb4 Ra8 26. Nc5 Rfb8 27. Qc3 Be8 28. Ra1 Ng6 29. Rfb1 Nf8 30. Qd3 g6 31. Qd2 Ra7 32. cxd5 cxd5 33. b4 Bc6 34. Bd3 Bb5 35. Qe2 Bxd3 36. Qxd3 Qc7 37. a6 Rb6 38. b5 Qd8 39. Rc1 Qe8 40. Rab1 Rc7 41. exd5 exd5 42. Re1 Qf7 43. Na4 Rd6 44. b6 Rc4 1-0

[Event "Rheinhausen-ch 2nd"]
[Site "Rheinhausen"]
[Date "1998.??.??"]
[Round "?"]
[White "Kerkhoff, Leo"]
[Black "Honacker, W."]
[Result "1-0"]
[ECO "B06"]
[WhiteElo "2270"]
[PlyCount "107"]
[EventDate "1998.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. f4 d6 4. Nf3 Nd7 5. Bd3 c5 6. d5 Ngf6 7. c3 0-0 8. Nbd2 a6 9. Nf1 b5 10. Bd2 Qc7 11. Ng3 Nb6 12. Qc1 Re8 13. 0-0 e5 14. fxe5 dxe5 15. h3 Bd7 16. Bg5 Nc8 17. Nh4 Qd6 18. Rf2 Rb8 19. Qd2 Rb6 20. Raf1 Qe7 21. Nf3 Qf8 22. Nh2 Qe7 23. Rf3 Rf8 24. Qf2 Nxe4 25. Nxe4 f6 26. Be3 c4 27. Bxb6 Nxb6 28. Qxb6 cxd3 29. Rxd3 f5 30. Nc5 e4 31. Rdd1 e3 32. Rfe1 e2 33. Rd2 Qe3+ 34. Kh1 Qxd2 35. Nf3 Qe3 36. Nxd7 Qxb6 37. Nxb6 Re8 38. Ng1 b4 39. Rxe2 Rb8 40. Na4 bxc3 41. Nxc3 g5 42. Rc2 h5 43. g3 g4 44. h4 Be5 45. Nge2 Kh7 46. Na4 Rb4 47. b3 Re4 48. Kg2 f4 49. gxf4 Bxf4 50. Nxf4 Rxf4 51. Rd2 Kg7 52. d6 Rf8 53. Nc5 Ra8 54. d7 1-0

[Event "Rheinhausen-ch 2nd"]
[Site "Rheinhausen"]
[Date "1998.??.??"]
[Round "?"]
[White "Kerkhoff, Leo"]
[Black "Klaus, Helmut"]
[Result "0-1"]
[ECO "B23"]
[WhiteElo "2270"]
[PlyCount "41"]
[EventDate "1998.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 b6 3. f4 Bb7 4. Nf3 e6 5. b3 Nf6 6. e5 Nd5 7. Nxd5 Bxd5 8. c3 Be7 9. d4 cxd4 10. cxd4 Bxf3 11. Qxf3 Bb4+ 12. Kf2 Nc6 13. Qd3 Nxd4 14. a3 Be7 15. Be3 Nf5 16. Be2 Nxe3 17. Kxe3 Bc5+ 18. Kf3 f6 19. Rhd1 fxe5 20. Qe4 Bd4 21. Bb5 0-1

[Event "Rheinhausen-ch 2nd"]
[Site "Rheinhausen"]
[Date "1998.??.??"]
[Round "?"]
[White "Mazurkiewicz, Kazimierz"]
[Black "Kerkhoff, Leo"]
[Result "1-0"]
[ECO "A28"]
[BlackElo "2270"]
[PlyCount "79"]
[EventDate "1998.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. d4 exd4 5. Nxd4 h6 6. g3 d6 7. Nxc6 bxc6 8. Bg2 Bb7 9. b4 a6 10. b5 axb5 11. cxb5 d5 12. Qb3 Qd6 13. 0-0 Qb4 14. Bf4 Bd6 15. Bxd6 Qxd6 16. a4 0-0 17. a5 Rfd8 18. a6 Bc8 19. e4 d4 20. e5 Qxe5 21. Rfe1 Qd6 22. Bxc6 Ra7 23. Nd5 Be6 24. Nxf6+ gxf6 25. Qf3 Kg7 26. Qa3 Bd5 27. Qxd6 Rxd6 28. Bxd5 Rxd5 29. Rab1 Kf8 30. Kf1 Rd6 31. Ke2 Rb6 32. Rec1 Kg7 33. Kd3 c6 34. Rxc6 Rxc6 35. bxc6 Rxa6 36. Rc1 Ra8 37. Kxd4 Kf8 38. c7 Rc8 39. Kd5 Ke7 40. Kc6 1-0

[Event "NED-chT"]
[Site "Netherlands"]
[Date "1997.??.??"]
[Round "?"]
[White "Kerkhoff, Leo"]
[Black "Van Gisbergen, Stan"]
[Result "0-1"]
[ECO "C84"]
[WhiteElo "2270"]
[BlackElo "2260"]
[PlyCount "108"]
[EventDate "1997.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2007"]
[Source "ChessBase"]
[SourceDate "2006.11.23"]
[SourceVersion "1"]
[SourceVersionDate "2006.11.23"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d4 exd4 6. 0-0 Be7 7. Re1 0-0 8. e5 Ne8 9. Bf4 f6 10. Bxc6 dxc6 11. Qxd4 Qxd4 12. Nxd4 f5 13. Nf3 g6 14. Bg5 Bxg5 15. Nxg5 Ng7 16. f4 h6 17. Nh3 Ne6 18. Nd2 b6 19. Rad1 Bb7 20. Nc4 Rad8 21. Ne3 c5 22. c3 Be4 23. Rxd8 Rxd8 24. Rd1 Rxd1+ 25. Nxd1 Kf7 26. Kf2 c4 27. g3 Nc5 28. Ke3 Ke6 29. Kd4 Bb1 30. a3 Bd3 31. Nhf2 Be2 32. Ke3 Bxd1 33. Nxd1 Kd5 34. Kf3 b5 35. h3 a5 36. Ne3+ Ke6 37. g4 Na4 38. gxf5+ gxf5 39. Nd1 c5 40. Kg3 b4 41. cxb4 axb4 42. axb4 cxb4 43. Kf3 b3 44. Ke3 c3 45. bxc3 b2 46. Nxb2 Nxb2 47. Kd4 Na4 48. c4 Nb6 49. Kc5 Nd7+ 50. Kd4 Nf8 51. c5 Ng6 52. c6 Nxf4 53. c7 Kd7 54. e6+ Nxe6+ 0-1

[Event "NED-chT 9697"]
[Site "Netherlands"]
[Date "1996.??.??"]
[Round "?"]
[White "Cuijpers, Frans Andre"]
[Black "Kerkhoff, Leo"]
[Result "1-0"]
[ECO "C73"]
[WhiteElo "2435"]
[BlackElo "2270"]
[PlyCount "68"]
[EventDate "1996.??.??"]
[EventType "team"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. Bxc6+ bxc6 6. d4 f6 7. Nc3 Ne7 8. Be3 Ng6 9. Qe2 Be7 10. 0-0-0 Be6 11. h4 h5 12. dxe5 fxe5 13. Ng5 Bg8 14. g3 Bf6 15. f4 Qc8 16. f5 Nf8 17. g4 hxg4 18. Qxg4 Rb8 19. h5 Qb7 20. b3 Qb4 21. Bd2 a5 22. Rdf1 Qa3+ 23. Kd1 Ke7 24. Nf3 Bf7 25. Bg5 Nd7 26. Bc1 Qc5 27. Bd2 d5 28. Ng5 d4 29. Na4 Qa3 30. Nxf7 Kxf7 31. Qe2 Rhd8 32. Qc4+ Kf8 33. h6 d3 34. h7 dxc2+ 1-0

[Event "NED-chT 9697"]
[Site "Netherlands"]
[Date "1996.??.??"]
[Round "?"]
[White "Hania, Jan"]
[Black "Kerkhoff, Leo"]
[Result "1-0"]
[ECO "C25"]
[WhiteElo "2315"]
[BlackElo "2270"]
[PlyCount "117"]
[EventDate "1996.??.??"]
[EventType "team"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nc6 3. g3 Bc5 4. Bg2 a6 5. d3 d6 6. Nge2 h5 7. Nd5 Nge7 8. Be3 Bxe3 9. Nxe3 Nd4 10. c3 Nxe2 11. Qxe2 c5 12. h4 Be6 13. f4 f6 14. Bf3 Bf7 15. Bg2 Qd7 16. a3 0-0-0 17. 0-0-0 Kb8 18. Kb1 Bb3 19. Rd2 Qa4 20. Bf3 b5 21. Qf2 Ka8 22. Bd1 Rb8 23. Bxb3 Qxb3 24. Nc2 Nc6 25. Na1 Qe6 26. Rc1 Rhc8 27. b4 cxb4 28. axb4 Rc7 29. Ra2 Kb7 30. Kb2 exf4 31. gxf4 f5 32. e5 a5 33. bxa5 b4 34. c4 dxe5 35. Nb3 Qf6 36. Kb1 Ka8 37. a6 exf4 38. Qxf4 Qe5 39. Qf3 Ka7 40. Re2 Qf6 41. d4 Rb6 42. Qf4 Qd8 43. d5 Nb8 44. Nd4 Re7 45. c5 Rxa6 46. Nb5+ Kb7 47. Qxb4 Ka8 48. Rxe7 Qxe7 49. d6 Qe2 50. Nc7+ Ka7 51. Nxa6 Qd3+ 52. Kb2 Nxa6 53. Qb3 Qd4+ 54. Qc3 Qxh4 55. Ra1 Qf2+ 56. Kb3 Qg2 57. Qd3 Qb7+ 58. Kc2 Qg2+ 59. Kc3 1-0

[Event "NED-chT 9596"]
[Site "Netherlands"]
[Date "1995.??.??"]
[Round "?"]
[White "Brink, Jan"]
[Black "Kerkhoff, Leo"]
[Result "0-1"]
[ECO "C30"]
[BlackElo "2270"]
[PlyCount "78"]
[EventDate "1995.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. d4 exd4 5. Bd3 Nc6 6. 0-0 Nge7 7. Qe1 d5 8. Nbd2 Nb4 9. f5 Nxd3 10. cxd3 f6 11. Kh1 0-0 12. Nb3 Bb6 13. Nfxd4 dxe4 14. Qxe4 Re8 15. Qg4 Qd5 16. Bh6 g6 17. Qh4 Nxf5 18. Nxf5 Bxf5 19. Qxf6 Qe5 20. Qg5 Be3 21. Qxe3 Qxe3 22. Bxe3 Rxe3 23. Kg1 Bxd3 24. Rfe1 Rae8 25. Rxe3 Rxe3 26. Rc1 Re2 27. Rd1 Bc4 28. Rd7 Bxb3 29. axb3 Rxb2 30. Rd8+ Kg7 31. Rd7+ Kf6 32. Rxh7 Rxb3 33. Rxc7 Rb2 34. Rd7 a5 35. g4 b5 36. h4 a4 37. Rd6+ Ke5 38. Rxg6 a3 39. Ra6 a2 0-1

[Event "NED-chT 9596"]
[Site "Netherlands"]
[Date "1995.??.??"]
[Round "?"]
[White "Kerkhoff, Leo"]
[Black "Krudde, Fitzgerald"]
[Result "0-1"]
[ECO "B87"]
[WhiteElo "2270"]
[BlackElo "2255"]
[PlyCount "76"]
[EventDate "1995.??.??"]
[EventType "team"]
[EventRounds "9"]
[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 Nf6 5. Nc3 a6 6. Bc4 b5 7. Bb3 e6 8. Qf3 Bb7 9. 0-0 Nbd7 10. Re1 Qb6 11. Be3 Nc5 12. Bxe6 fxe6 13. Nxe6 Qc6 14. Bxc5 dxc5 15. Nd5 Kf7 16. Nxf6 Qxe6 17. Nd5+ Kg8 18. Nc7 Qe7 19. Nxa8 Bxa8 20. a4 b4 21. Qd3 Qe6 22. Qd8 Bc6 23. Rad1 h5 24. Re3 Rh6 25. Rf3 Rf6 26. Rxf6 Qxf6 27. Qc8 Bxe4 28. Rd8 Bxc2 29. a5 Bf5 30. Qa8 c4 31. h3 c3 32. bxc3 bxc3 33. Re8 c2 34. Re1 Kh7 35. Qd5 Ba3 36. g4 Bg6 37. gxh5 Bf5 38. Qc4 Qg5+ 0-1

[Event "NED-chT 9596"]
[Site "Netherlands"]
[Date "1995.??.??"]
[Round "?"]
[White "Kerkhoff, Leo"]
[Black "Los, Sander"]
[Result "0-1"]
[ECO "B73"]
[WhiteElo "2270"]
[BlackElo "2365"]
[PlyCount "122"]
[EventDate "1995.??.??"]
[EventType "team"]
[EventRounds "9"]
[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 Nf6 5. Nc3 g6 6. Be2 Bg7 7. 0-0 0-0 8. Be3 Nc6 9. Kh1 d5 10. exd5 Nxd5 11. Nxd5 Qxd5 12. c4 Qe5 13. Nxc6 bxc6 14. Bf3 Bf5 15. Bxc6 Rac8 16. Qa4 Qxb2 17. Rac1 Bd4 18. Bxd4 Qxd4 19. c5 Qxa4 20. Bxa4 Rc7 21. Rc3 Rfc8 22. c6 Be4 23. Kg1 e6 24. Rfc1 Kf8 25. Bb5 Rb8 26. Ba6 Rb6 27. Bb7 Ke7 28. a4 Kd6 29. a5 Rb2 30. h4 h6 31. a6 g5 32. hxg5 hxg5 33. Rd1+ Bd5 34. Rh3 g4 35. Rh8 f5 36. Rd8+ Ke7 37. Ra8 g3 38. fxg3 Rxg2+ 39. Kf1 Rxg3 40. Rxa7 Bxc6 41. Rc1 Bb5+ 42. Kf2 Rxc1 43. Kxg3 Kd6 44. Ra8 Ke5 45. Rc8 Rxc8 46. Bxc8 Bc6 47. Bb7 Kd6 48. Bc8 Bd5 49. a7 Ke5 50. Ba6 Kf6 51. Kf4 e5+ 52. Ke3 Ke7 53. Bc4 Ba8 54. Bg8 Kd6 55. Bh7 f4+ 56. Kd3 Kc7 57. Kc4 Kb6 58. Bf5 Kxa7 59. Kc5 e4 60. Kd4 e3 61. Bg4 Kb6 0-1

[Event "NED-chT 9596"]
[Site "Netherlands"]
[Date "1995.??.??"]
[Round "?"]
[White "Kerkhoff, Leo"]
[Black "Nieuwenhuis, Pieter"]
[Result "0-1"]
[ECO "B34"]
[WhiteElo "2270"]
[BlackElo "2315"]
[PlyCount "118"]
[EventDate "1995.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Bg7 5. Nc3 Nc6 6. Be3 Nf6 7. Be2 0-0 8. 0-0 d5 9. exd5 Nxd5 10. Nxd5 Qxd5 11. Bf3 Qc4 12. Nxc6 bxc6 13. Qd3 Ba6 14. Rfd1 Bxb2 15. Rab1 Bc3 16. Qxc4 Bxc4 17. Bxc6 Rac8 18. Bd5 Be2 19. Rdc1 Rfd8 20. Bb3 Rc7 21. h3 Kg7 22. Ba4 Rd5 23. Rb8 h5 24. Bb3 Rd6 25. Ra8 a6 26. Ra7 Rxa7 27. Bxa7 f5 28. Rb1 Rd7 29. Be3 Kf6 30. Ba4 Rd6 31. Bc5 Rd5 32. Rb6+ e6 33. Be3 Bc4 34. Rc6 Be5 35. f4 Rd1+ 36. Kh2 Bd4 37. c3 Bxe3 38. Bxd1 Bb5 39. Rc8 Bxf4+ 40. g3 Be5 41. c4 Bd7 42. Rh8 Kf7 43. Ra8 h4 44. Rxa6 hxg3+ 45. Kg2 Bc8 46. Ra7+ Kf6 47. c5 Bb8 48. Rh7 e5 49. c6 Bd6 50. Kxg3 f4+ 51. Kg2 e4 52. Bg4 f3+ 53. Kh1 Ba6 54. Rd7 Bc7 55. Rd1 Ke5 56. Kg1 Kf4 57. Rd7 Kg3 58. Rf7 Bb6+ 59. Kh1 Bf1 0-1

[Event "NED-chT 9596"]
[Site "Netherlands"]
[Date "1995.??.??"]
[Round "?"]
[White "Kouwenhoven, Marisca"]
[Black "Kerkhoff, Leo"]
[Result "0-1"]
[ECO "C55"]
[WhiteElo "2010"]
[BlackElo "2270"]
[PlyCount "52"]
[EventDate "1995.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. 0-0 Nxe4 5. Nc3 Nxc3 6. dxc3 Qe7 7. Qd5 d6 8. Ng5 Nd8 9. f4 c6 10. Qf3 d5 11. Bb3 e4 12. Qf2 h6 13. Nh3 Bf5 14. Be3 Ne6 15. c4 d4 16. Bxd4 Nxd4 17. Qxd4 Qc5 18. Qxc5 Bxc5+ 19. Kh1 0-0-0 20. Ba4 Rd2 21. a3 e3 22. Ng1 Be4 23. Nf3 Bxf3 24. gxf3 e2 25. Rfb1 Bf2 26. c3 Re8 0-1

[Event "NED-chT 9495"]
[Site "Netherlands"]
[Date "1994.??.??"]
[Round "9"]
[White "Boersma, Paul"]
[Black "Kerkhoff, Leo"]
[Result "1-0"]
[ECO "E94"]
[WhiteElo "2360"]
[BlackElo "2270"]
[PlyCount "58"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. d4 0-0 6. Be2 c6 7. 0-0 e5 8. d5 c5 9. Bg5 h6 10. Bh4 a6 11. Nd2 Qe8 12. Rb1 Nh7 13. b4 cxb4 14. Rxb4 f5 15. exf5 gxf5 16. Bh5 Qd7 17. Na4 Qc7 18. Nb6 Ra7 19. f4 Qc5+ 20. Bf2 Qxb4 21. Nxc8 Rxc8 22. Bxa7 Nd7 23. Be3 b5 24. Bg6 bxc4 25. Bxf5 Nhf6 26. fxe5 dxe5 27. Ne4 Nxe4 28. Bxe4 c3 29. Qg4 Rf8 1-0

[Event "NED-chT 9495"]
[Site "Netherlands"]
[Date "1994.??.??"]
[Round "8"]
[White "Kerkhoff, Leo"]
[Black "Los, Sander"]
[Result "0-1"]
[ECO "B70"]
[WhiteElo "2270"]
[BlackElo "2340"]
[PlyCount "68"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Bc4 Bg7 7. h3 0-0 8. Bb3 a6 9. 0-0 b5 10. a4 b4 11. Nd5 e6 12. Nxf6+ Qxf6 13. Nf3 Qe7 14. Bf4 Rd8 15. Bg5 Bf6 16. Bxf6 Qxf6 17. Qd2 Nc6 18. Qh6 Nd4 19. Ng5 Qg7 20. Qxg7+ Kxg7 21. Rfd1 Nxb3 22. cxb3 e5 23. Rac1 h6 24. Nf3 Be6 25. Rc6 d5 26. Nxe5 dxe4 27. Rxd8 Rxd8 28. Rxa6 Rd1+ 29. Kh2 Rd2 30. Rb6 Rxf2 31. Rxb4 e3 32. Nd3 e2 33. Kg3 Rf1 34. a5 Bf5 0-1

[Event "NED-chT 9495"]
[Site "Netherlands"]
[Date "1994.??.??"]
[Round "2"]
[White "Kerkhoff, Leo"]
[Black "Martens, Martin"]
[Result "1-0"]
[ECO "B42"]
[WhiteElo "2270"]
[BlackElo "2415"]
[PlyCount "87"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Bd3 a6 6. 0-0 Qc7 7. Kh1 d5 8. exd5 Nxd5 9. c4 Nf6 10. Qf3 Bc5 11. Nb3 Bd6 12. c5 Be5 13. N1d2 Qc6 14. Ne4 Nxe4 15. Bxe4 Qc7 16. Bd2 Nc6 17. Rfe1 Bd7 18. Bc3 Bxc3 19. Qxc3 0-0 20. Rad1 Rad8 21. Rd6 f5 22. Bxc6 Bxc6 23. Rdxe6 Qf4 24. Qg3 Qxg3 25. hxg3 f4 26. gxf4 Rxf4 27. f3 Ra4 28. a3 h6 29. Rd6 Rc8 30. Nd4 Rc4 31. b4 Rc3 32. Nxc6 bxc6 33. Ree6 Rxa3 34. Rxc6 Rb8 35. Rb6 Ra8 36. Re7 a5 37. c6 Rc3 38. b5 a4 39. Rbb7 a3 40. Rxg7+ Kf8 41. Rh7 Kg8 42. Rbg7+ Kf8 43. Rh8+ Kxg7 44. Rxa8 1-0

[Event "NED-chT 9495"]
[Site "Netherlands"]
[Date "1994.??.??"]
[Round "3"]
[White "Kerkhoff, Leo"]
[Black "Roebers, Jan"]
[Result "1-0"]
[ECO "C84"]
[WhiteElo "2270"]
[PlyCount "43"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d4 exd4 6. 0-0 Be7 7. Re1 b5 8. Bb3 d6 9. Bd5 Bd7 10. Nxd4 Nxd5 11. Nxc6 Bxc6 12. exd5 Bb7 13. Bg5 f6 14. Bf4 Qd7 15. Nc3 0-0 16. a4 b4 17. Ne2 Rae8 18. c4 bxc3 19. bxc3 Qf5 20. c4 Qe4 21. Rc1 f5 22. f3 1-0

[Event "NED-chT 9495"]
[Site "Netherlands"]
[Date "1994.??.??"]
[Round "1"]
[White "Kerkhoff, Leo"]
[Black "Van der Vliet, Fredrik"]
[Result "0-1"]
[ECO "B80"]
[WhiteElo "2270"]
[BlackElo "2330"]
[PlyCount "56"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e6 7. f3 b5 8. Qd2 Nbd7 9. g4 h6 10. h4 Bb7 11. Rg1 b4 12. Na4 e5 13. Nf5 d5 14. g5 hxg5 15. hxg5 g6 16. gxf6 gxf5 17. exd5 Qa5 18. b3 f4 19. Bf2 Qxd5 20. 0-0-0 Qxd2+ 21. Rxd2 Bxf3 22. Nb6 Rd8 23. Bxa6 Nxb6 24. Bxb6 Rxd2 25. Kxd2 Kd7 26. Bb5+ Ke6 27. Rg5 Bd6 28. Bd3 Kxf6 0-1

[Event "NED-chT 9495"]
[Site "Netherlands"]
[Date "1994.??.??"]
[Round "4"]
[White "Klip, Hans"]
[Black "Kerkhoff, Leo"]
[Result "0-1"]
[ECO "C54"]
[WhiteElo "2345"]
[BlackElo "2270"]
[PlyCount "142"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "9"]
[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. d3 Nc6 4. Nf3 Bc5 5. c3 Bb6 6. 0-0 d6 7. Bb3 h6 8. Nbd2 Nh5 9. Nc4 Qf6 10. Nfxe5 Nxe5 11. Nxe5 Qxe5 12. d4 Qa5 13. e5 g6 14. Qf3 Be6 15. Qxb7 Rd8 16. Qc6+ Ke7 17. Bxe6 fxe6 18. a4 dxe5 19. b4 Qd5 20. Qxd5 Rxd5 21. a5 Bxd4 22. cxd4 exd4 23. Re1 g5 24. Bb2 Nf4 25. Rad1 Rhd8 26. g3 Ng6 27. Re4 e5 28. h4 gxh4 29. f4 hxg3 30. fxe5 Nxe5 31. Kg2 Kf6 32. Rdxd4 Kf5 33. Rf4+ Kg6 34. Kxg3 Nd3 35. Rf6+ Kh7 36. Rf7+ Kg6 37. Rg7+ Kf5 38. Rf7+ Ke6 39. Rf6+ Ke7 40. Re4+ Kd7 41. Bd4 Nxb4 42. Bxa7 Rxa5 43. Rxb4 Rxa7 44. Rxh6 Ra5 45. Kf4 Re8 46. Rh7+ Kd6 47. Re4 Rf8+ 48. Ke3 c5 49. Rh6+ Kd5 50. Rh5+ Kc6 51. Ree5 Rd8 52. Rhf5 Rd4 53. Re8 Ra3+ 54. Ke2 Kb5 55. Rb8+ Kc4 56. Rc8 Ra2+ 57. Ke1 Ra5 58. Rb8 Rh4 59. Kf2 Rh3 60. Kg2 Rd3 61. Rb2 Kc3 62. Rff2 c4 63. Rbc2+ Kb4 64. Rb2+ Rb3 65. Rbc2 Rg5+ 66. Kf1 Rb1+ 67. Ke2 Kb3 68. Ke3 c3 69. Kd3 Rg3+ 70. Kd4 Rb2 71. Rxc3+ Rxc3 0-1

[Event "NED-chT 9495"]
[Site "Netherlands"]
[Date "1994.??.??"]
[Round "6"]
[White "Timmer, Robert"]
[Black "Kerkhoff, Leo"]
[Result "1/2-1/2"]
[ECO "E68"]
[WhiteElo "2300"]
[BlackElo "2270"]
[PlyCount "198"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 0-0 5. Nf3 d6 6. d4 Nbd7 7. 0-0 e5 8. e4 Re8 9. Re1 exd4 10. Nxd4 Nc5 11. h3 a5 12. Qc2 Ng4 13. Rd1 Ne5 14. b3 a4 15. Rb1 axb3 16. axb3 Bd7 17. Be3 Qc8 18. Kh2 Nc6 19. Nxc6 Bxc6 20. Nd5 b6 21. Bg5 Bxd5 22. cxd5 Qa6 23. b4 Qa4 24. Qxa4 Nxa4 25. Rbc1 Nc3 26. Re1 Ra2 27. Be3 Rb2 28. e5 Ne2 29. Rxc7 Bxe5 30. Bxb6 Rb8 31. Be3 R8xb4 32. Bh6 Rb8 33. Re7 Nd4 34. R1xe5 dxe5 35. g4 Nb5 36. Kg3 Rb3+ 37. Kh4 Nd6 38. Rd7 Ne8 39. d6 Rd3 40. Re7 Rxd6 41. Rxe5 Ng7 42. Ra5 Rd3 43. Bd5 Rd8 44. Ba2 Ne6 45. Bxe6 fxe6 46. Be3 Kf7 47. Ra4 R8d7 48. Rf4+ Kg7 49. Re4 R3d6 50. Kg3 Rc6 51. Ra4 Kf7 52. Bf4 Ke7 53. Bg5+ Kd6 54. Rd4+ Kc7 55. Bf4+ Kc8 56. Rb4 Rb7 57. Ra4 Rc3+ 58. Be3 Kd7 59. Rd4+ Kc6 60. Rd8 Rc4 61. Rd1 e5 62. Rd2 Rd7 63. Ra2 Kd5 64. Rd2+ Rd4 65. Ra2 Rd3 66. Ra4 Rf7 67. Kg2 Rd4 68. Ra5+ Ke4 69. Bh6 Rc4 70. Ra2 Rc3 71. Re2+ Kd4 72. Be3+ Kd3 73. Rd2+ Ke4 74. Bh6 Rff3 75. Re2+ Kd5 76. Bg7 Rf7 77. Bxe5 Re7 78. Bxc3 Rxe2 79. Bf6 Ke4 80. Bg5 Ra2 81. Bh6 Ra5 82. Be3 Ra8 83. Bh6 Ra7 84. Be3 Rf7 85. Bh6 Kd3 86. Bg5 Ke2 87. Be3 Rf3 88. Bb6 Rb3 89. Be3 Rxe3 90. fxe3 Kxe3 91. Kg3 g5 92. h4 h6 93. hxg5 hxg5 94. Kg2 Kf4 95. Kf2 Kxg4 96. Kg2 Kf4 97. Kf2 g4 98. Kg2 g3 99. Kg1 Kf3 1/2-1/2

[Event "NED-chT 9495"]
[Site "Netherlands"]
[Date "1994.??.??"]
[Round "7"]
[White "Vosselman, Jan M"]
[Black "Kerkhoff, Leo"]
[Result "1-0"]
[ECO "E93"]
[WhiteElo "2305"]
[BlackElo "2270"]
[PlyCount "71"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 Nbd7 7. h3 e5 8. d5 Nc5 9. Qc2 a5 10. g4 Ne8 11. Be3 Bd7 12. 0-0-0 a4 13. Kb1 f5 14. exf5 gxf5 15. Nd2 Na6 16. f3 Nb4 17. Qc1 a3 18. bxa3 Na6 19. Nb3 c6 20. Bg5 Qb6 21. Na4 Qc7 22. Be3 c5 23. Nc3 Qb8 24. Bh6 Nac7 25. Rhg1 b5 26. gxf5 Bxf5+ 27. Ka1 bxc4 28. Bxc4 Bg6 29. h4 Rxf3 30. h5 Bxh5 31. Be2 Rf5 32. Bd3 Rf4 33. Rdf1 Kh8 34. Bxg7+ Nxg7 35. Rxf4 exf4 36. Qxf4 1-0

[Event "NED-chT"]
[Site "Netherlands"]
[Date "1993.??.??"]
[Round "3"]
[White "Bertholee, Rob"]
[Black "Kerkhoff, Leo"]
[Result "1-0"]
[ECO "C44"]
[WhiteElo "2350"]
[BlackElo "2270"]
[PlyCount "85"]
[EventDate "1993.??.??"]
[EventType "team"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 1997"]
[Source "ChessBase"]
[SourceDate "1996.11.15"]
[SourceVersion "1"]
[SourceVersionDate "1996.11.15"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. c3 Nf6 4. d4 Nxe4 5. d5 Bc5 6. dxc6 Bxf2+ 7. Ke2 bxc6 8. Qa4 f5 9. Nbd2 0-0 10. Nxe4 fxe4 11. Qxe4 d5 12. Qxe5 Re8 13. Qxe8+ Qxe8+ 14. Kxf2 Qe7 15. Be2 Rb8 16. Re1 a5 17. Bd3 Qd6 18. Re8+ Kf7 19. Re2 Kg8 20. Re8+ Kf7 21. Re2 Kg8 22. h3 c5 23. b3 Bd7 24. Bg5 a4 25. Be7 Qb6 26. Kf1 Re8 27. b4 cxb4 28. cxb4 Bb5 29. Bxb5 Qxb5 30. Kf2 c5 31. bxc5 Rxe7 32. Rxe7 Qb2+ 33. Kg3 Qxa1 34. c6 Kf8 35. Rb7 Qf6 36. c7 Qd6+ 37. Kf2 Qc5+ 38. Kf1 Qc1+ 39. Ne1 Qf4+ 40. Kg1 Qc1 41. Kh2 Ke8 42. Nd3 Qc6 43. Rb8+ 1-0

[Event "NED-chT"]
[Site "Netherlands"]
[Date "1993.??.??"]
[Round "9"]
[White "Grooten, Herman"]
[Black "Kerkhoff, Leo"]
[Result "1-0"]
[ECO "E90"]
[WhiteElo "2410"]
[BlackElo "2270"]
[PlyCount "81"]
[EventDate "1993.??.??"]
[EventType "team"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 1997"]
[Source "ChessBase"]
[SourceDate "1996.11.15"]
[SourceVersion "1"]
[SourceVersionDate "1996.11.15"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 Nbd7 7. Be3 Ng4 8. Bg5 h6 9. Bh4 c5 10. d5 a6 11. Nd2 Ngf6 12. f4 b5 13. cxb5 axb5 14. Bxb5 Ba6 15. Bxa6 Rxa6 16. Qe2 Qb6 17. Nc4 Qb4 18. 0-0 Rfa8 19. e5 dxe5 20. a3 Qb7 21. fxe5 Nh7 22. Bxe7 Nxe5 23. d6 Nxc4 24. Qxc4 Ng5 25. Rae1 Qxb2 26. Bxg5 Qxc3 27. Qxf7+ Kh8 28. d7 hxg5 29. Re8+ Kh7 30. Qg8+ Kh6 31. Rxa8 Rxa8 32. Qxa8 Qd4+ 33. Kh1 Qxd7 34. Qf3 c4 35. a4 c3 36. Qh3+ Qxh3 37. gxh3 Bd4 38. Rc1 Kh5 39. a5 g4 40. hxg4+ Kxg4 41. a6 1-0

[Event "NED-chT"]
[Site "Netherlands"]
[Date "1993.??.??"]
[Round "1"]
[White "Kerkhoff, Leo"]
[Black "Kuijf, Marinus"]
[Result "0-1"]
[ECO "B55"]
[WhiteElo "2270"]
[BlackElo "2440"]
[PlyCount "106"]
[EventDate "1993.??.??"]
[EventType "team"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 1997"]
[Source "ChessBase"]
[SourceDate "1996.11.15"]
[SourceVersion "1"]
[SourceVersionDate "1996.11.15"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nxc6 bxc6 6. Bd3 Nf6 7. 0-0 Be7 8. c4 0-0 9. Nc3 d6 10. Kh1 Be6 11. Qe2 Rb8 12. b3 Rb7 13. Bb2 Re8 14. Rad1 Bf8 15. Bb1 Rd7 16. Rd3 Bg4 17. Qd2 Nh5 18. f3 Be6 19. g3 Nf6 20. Rd1 d5 21. cxd5 cxd5 22. Nxd5 Nxd5 23. exd5 Bf5 24. Re3 Bxb1 25. Rxb1 Rxd5 26. Qe1 Bc5 27. Re2 f6 28. Rc1 Bb6 29. Qb4 Kh8 30. Kg2 Qd7 31. h4 Rd8 32. Rcc2 Rd3 33. Bc1 Rd4 34. Rc4 Rd3 35. Rce4 Bd4 36. Rd2 Rxd2+ 37. Qxd2 Qc6 38. Bb2 Bb6 39. Qe1 Rd3 40. Qe2 Qd5 41. Bc1 Qd7 42. Rc4 Rd1 43. g4 h5 44. Rc8+ Qxc8 45. Qxd1 hxg4 46. fxg4 Qc6+ 47. Kh2 Qe4 48. h5 f5 49. h6 gxh6 50. Bxh6 Bd4 51. Bg5 f4 52. Qh1 Qh7+ 53. Kg2 f3+ 0-1

[Event "NED-chT"]
[Site "Netherlands"]
[Date "1993.??.??"]
[Round "2"]
[White "Kerkhoff, Leo"]
[Black "Pliester, Leon"]
[Result "0-1"]
[ECO "B40"]
[WhiteElo "2270"]
[BlackElo "2385"]
[PlyCount "126"]
[EventDate "1993.??.??"]
[EventType "team"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 1997"]
[Source "ChessBase"]
[SourceDate "1996.11.15"]
[SourceVersion "1"]
[SourceVersionDate "1996.11.15"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nxc6 bxc6 6. Bd3 Nf6 7. 0-0 e5 8. c4 Be7 9. Nc3 d6 10. b3 0-0 11. Bb2 Rb8 12. Qe2 Nd7 13. Na4 Re8 14. Rad1 Qc7 15. Bb1 Nf8 16. g3 Ne6 17. f4 c5 18. fxe5 dxe5 19. Qh5 Bf6 20. Rxf6 gxf6 21. Nc3 Nd4 22. Nd5 Qd8 23. Rf1 Rb6 24. Bxd4 cxd4 25. Nxb6 axb6 26. Bd3 Re6 27. b4 Qf8 28. a3 Bd7 29. Rc1 Qa8 30. Ra1 Qa4 31. Qe2 Re8 32. Qb2 Bc6 33. Rf1 Re6 34. c5 bxc5 35. bxc5 Kg7 36. Qb4 Qa8 37. Re1 Re8 38. Qb2 Rb8 39. Qf2 Rb3 40. Rf1 Qd8 41. Bc4 Rc3 42. Qe2 d3 43. Qg4+ Kf8 44. Bd5 Bxd5 45. exd5 Rxc5 46. Qh4 Rxd5 47. Qxh7 Qb6+ 48. Kg2 d2 49. Rd1 Qe3 50. Qh5 Rd3 51. Kf1 Qe4 52. Rxd2 Rxd2 53. Qh6+ Ke7 54. Qxd2 Qh1+ 55. Ke2 Qxh2+ 56. Kd1 Qxd2+ 57. Kxd2 f5 58. Kd3 Kd6 59. Kc4 Kc6 60. Kb4 Kb6 61. a4 e4 62. Kc3 Ka5 63. Kb3 f6 0-1

[Event "NED-chT"]
[Site "Netherlands"]
[Date "1993.??.??"]
[Round "5"]
[White "Kerkhoff, Leo"]
[Black "Van der Lijn, Dik"]
[Result "1-0"]
[ECO "B00"]
[WhiteElo "2270"]
[PlyCount "117"]
[EventDate "1993.??.??"]
[EventType "team"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 1997"]
[Source "ChessBase"]
[SourceDate "1996.11.15"]
[SourceVersion "1"]
[SourceVersionDate "1996.11.15"]
[SourceQuality "1"]

1. e4 Nc6 2. d4 d5 3. e5 Bf5 4. Bd3 Nxd4 5. Bxf5 Nxf5 6. Qd3 Qd7 7. Ne2 e6 8. Bg5 Be7 9. Bf4 g5 10. Bd2 c5 11. c4 d4 12. Na3 h5 13. Ng3 Nh4 14. 0-0-0 a6 15. Ne4 Ng6 16. Bxg5 Bxg5+ 17. Nxg5 Nxe5 18. Qg3 f6 19. Rhe1 0-0-0 20. f4 h4 21. Qh3 d3 22. Rd2 fxg5 23. Rxe5 gxf4 24. Rxc5+ Kb8 25. Re5 Rh6 26. Qf3 Qd4 27. Re4 Qg1+ 28. Rd1 Qxh2 29. Rxf4 Qg3 30. Qxg3 hxg3 31. Rf3 Rg6 32. Rdxd3 Rxd3 33. Rxd3 Kc7 34. Nc2 Nf6 35. Nd4 Ne4 36. Re3 Nc5 37. b4 Rg4 38. Nc2 Ne4 39. Kd1 Kd7 40. Ke2 Nd6 41. c5 Nf5 42. Rd3+ Ke7 43. a3 Rf4 44. Rf3 Rc4 45. Ne3 Nxe3 46. Rxe3 a5 47. Kd3 Rg4 48. Re4 Rg5 49. Kc4 axb4 50. axb4 Rg8 51. Kb5 Rg7 52. Kb6 Kf6 53. b5 Kf5 54. Re3 e5 55. Rf3+ Kg4 56. c6 bxc6 57. bxc6 e4 58. Rf8 e3 59. c7 1-0

[Event "NED-chT"]
[Site "Netherlands"]
[Date "1993.??.??"]
[Round "6"]
[White "Tondivar, Babak"]
[Black "Kerkhoff, Leo"]
[Result "1/2-1/2"]
[ECO "E90"]
[WhiteElo "2265"]
[BlackElo "2270"]
[PlyCount "91"]
[EventDate "1993.??.??"]
[EventType "team"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 1997"]
[Source "ChessBase"]
[SourceDate "1996.11.15"]
[SourceVersion "1"]
[SourceVersionDate "1996.11.15"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. h3 e5 7. d5 Nbd7 8. Be3 Nc5 9. Nd2 c6 10. b4 cxd5 11. cxd5 Ncd7 12. g4 a5 13. a3 axb4 14. axb4 Rxa1 15. Qxa1 Ne8 16. Rg1 Kh8 17. Bd3 f5 18. exf5 e4 19. Ndxe4 Ne5 20. Be2 gxf5 21. gxf5 Bxf5 22. Qd1 Qh4 23. Ng3 Qxb4 24. Nxf5 Rxf5 25. Bd2 Qd4 26. Rg2 Nd3+ 27. Bxd3 Qxd3 28. Qg4 Re5+ 29. Kd1 Re7 30. Qg3 Qc4 31. Kc2 b5 32. Qd3 Rc7 33. Qxc4 Rxc4 34. Rg4 Rc5 35. Kb3 Nf6 36. Rb4 Nxd5 37. Rxb5 Rxb5+ 38. Nxb5 Be5 39. Bb4 Nxb4 40. Kxb4 Kg7 41. Kc4 Kf7 42. Kd5 Ke7 43. Na3 Bh2 44. Nc4 Bg1 45. f4 Bc5 46. Ke4 1/2-1/2

[Event "NED-chT"]
[Site "Netherlands"]
[Date "1992.??.??"]
[Round "?"]
[White "Kerkhoff, Leo"]
[Black "Baltus, Pieter"]
[Result "1-0"]
[ECO "B32"]
[WhiteElo "2270"]
[PlyCount "109"]
[EventDate "1992.??.??"]
[EventType "team"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nxc6 bxc6 6. Bd3 Nf6 7. 0-0 Be7 8. b3 0-0 9. Bb2 d6 10. Kh1 Be6 11. Nd2 Qa5 12. Qe2 Rad8 13. a3 h6 14. Rad1 Bg4 15. f3 Be6 16. Nc4 Qc7 17. Bc3 Qc8 18. Ne3 Nh5 19. g3 Bh3 20. Rf2 Qc7 21. f4 Nf6 22. Qf3 Qc8 23. f5 h5 24. Bf1 Bxf1 25. Rfxf1 g5 26. fxg6 fxg6 27. Qg2 Ng4 28. Nxg4 Qxg4 29. h3 Qe6 30. Kh2 Kg7 31. Qg1 Rxf1 32. Rxf1 Rd7 33. Qe3 Bf6 34. Bd2 Kg8 35. Qh6 Bg7 36. Qg5 Kh7 37. g4 Rf7 38. Rxf7 Qxf7 39. gxh5 Qf2+ 40. Qg2 Qxg2+ 41. Kxg2 gxh5 42. c4 Bf6 43. b4 c5 44. b5 Bd8 45. a4 Kg6 46. a5 Bc7 47. Kf3 Kf6 48. Ke2 Ke6 49. Kd3 Kd7 50. Kc2 Bd8 51. Kb3 Kc8 52. Ka4 Kb8 53. a6 Bb6 54. Ba5 Kc7 55. Bxb6+ 1-0

[Event "NED-chT"]
[Site "Netherlands"]
[Date "1992.??.??"]
[Round "?"]
[White "Kerkhoff, Leo"]
[Black "De Vries, Eelco"]
[Result "1-0"]
[ECO "B80"]
[WhiteElo "2270"]
[BlackElo "2235"]
[PlyCount "49"]
[EventDate "1992.??.??"]
[EventType "team"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 d6 5. Nc3 a6 6. Be3 Qc7 7. Qd2 Nc6 8. 0-0-0 Nf6 9. f3 b5 10. Nxc6 Qxc6 11. g4 Bb7 12. Kb1 Be7 13. h4 0-0 14. Ne2 Qc7 15. Nd4 Nd7 16. g5 d5 17. g6 hxg6 18. h5 e5 19. hxg6 exd4 20. Bf4 Qd8 21. Qh2 fxg6 22. Bd3 Nc5 23. Rdg1 Nxd3 24. Qh7+ Kf7 25. Qxg6+ 1-0

[Event "NED-chT"]
[Site "Netherlands"]
[Date "1992.??.??"]
[Round "?"]
[White "Kerkhoff, Leo"]
[Black "Van der Fliert, Wilhelm G"]
[Result "1-0"]
[ECO "B01"]
[WhiteElo "2270"]
[PlyCount "41"]
[EventDate "1992.??.??"]
[EventType "team"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 Bf5 6. b4 Qxb4 7. Bd2 Qd6 8. Rb1 b6 9. Nb5 Qd8 10. Bf4 Nd5 11. Bc4 Nxf4 12. Ne5 Nxg2+ 13. Kf1 e6 14. Qf3 Nh4 15. Qxa8 Be7 16. Nxc7+ Qxc7 17. Bb5+ Kd8 18. Nc6+ Kc8 19. Nxa7+ Qxa7 20. Qxa7 Bd8 21. Rb3 1-0

[Event "NED-chT"]
[Site "Netherlands"]
[Date "1992.??.??"]
[Round "?"]
[White "Kuijf, Marinus"]
[Black "Kerkhoff, Leo"]
[Result "1-0"]
[ECO "C73"]
[WhiteElo "2440"]
[BlackElo "2270"]
[PlyCount "95"]
[EventDate "1992.??.??"]
[EventType "team"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. Bxc6+ bxc6 6. d4 exd4 7. Qxd4 c5 8. Qd3 Bb7 9. Nc3 Nf6 10. 0-0 Be7 11. Bf4 0-0 12. Rad1 Re8 13. Rfe1 Bf8 14. Bg5 h6 15. Bh4 Be7 16. e5 dxe5 17. Qc4 Nd7 18. Nxe5 Nxe5 19. Rxe5 Qxd1+ 20. Nxd1 Bxh4 21. Rxe8+ Rxe8 22. Ne3 Be7 23. Qb3 Bc6 24. Qd3 Bb5 25. Qd5 g6 26. Qb7 Bd6 27. b3 Re6 28. a4 Be8 29. Kf1 Bxh2 30. g3 Bxg3 31. fxg3 Rxe3 32. Qxc7 Rc3 33. Qe5 Rf3+ 34. Ke2 Bc6 35. Qd6 Be4 36. Qxa6 Rc3 37. Kd2 Rxc2+ 38. Kd1 Bf5 39. Qb7 Rc3 40. a5 Be6 41. a6 Bxb3+ 42. Kd2 Rc2+ 43. Kd3 c4+ 44. Kd4 Rd2+ 45. Kc5 Ra2 46. a7 c3 47. Qxb3 c2 48. Qxa2 1-0

[Event "NED-chT"]
[Site "Netherlands"]
[Date "1992.??.??"]
[Round "?"]
[White "Van Dijk, Harold"]
[Black "Kerkhoff, Leo"]
[Result "0-1"]
[ECO "E66"]
[BlackElo "2270"]
[PlyCount "90"]
[EventDate "1992.??.??"]
[EventType "team"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 0-0 5. 0-0 d6 6. c4 Nc6 7. Nc3 a6 8. d5 Na5 9. Nd2 c5 10. Qc2 Rb8 11. b3 b5 12. cxb5 axb5 13. Bb2 e6 14. dxe6 fxe6 15. Nce4 Bb7 16. Rad1 Nxe4 17. Bxg7 Kxg7 18. Nxe4 Bxe4 19. Qxe4 Rf6 20. Qc2 Qb6 21. e4 e5 22. f4 Nc6 23. fxe5 Rxf1+ 24. Rxf1 Nxe5 25. Qd2 Qd8 26. Rd1 Nf7 27. Qd5 Qe7 28. Bf1 Rb6 29. h4 Ne5 30. Be2 g5 31. h5 g4 32. Kg2 Qg5 33. Qd2 Qxh5 34. Rh1 Qg6 35. Qf4 Rb7 36. Rf1 Rf7 37. Qe3 Rxf1 38. Bxf1 Nf3 39. Qc3+ Nd4 40. Qe3 Qh5 41. a4 Nf3 42. Bxb5 Qh2+ 43. Kf1 Qh1+ 44. Ke2 Qe1+ 45. Kd3 Ne5+ 0-1

[Event "NED-chT"]
[Site "Netherlands"]
[Date "1987.??.??"]
[Round "?"]
[White "Bartels, Hans A"]
[Black "Kerkhoff, Leo"]
[Result "0-1"]
[ECO "E95"]
[WhiteElo "2315"]
[BlackElo "2215"]
[PlyCount "62"]
[EventDate "1987.??.??"]
[EventType "team"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1997"]
[Source "ChessBase"]
[SourceDate "1996.11.15"]
[SourceVersion "1"]
[SourceVersionDate "1996.11.15"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Nf3 Nbd7 7. 0-0 e5 8. Re1 c6 9. Bf1 Ng4 10. h3 exd4 11. Nxd4 Qb6 12. hxg4 Bxd4 13. Be3 Bxe3 14. Rxe3 Qc5 15. Be2 Nf6 16. g3 Be6 17. a3 Bxc4 18. Bxc4 Qxc4 19. g5 Ne8 20. e5 dxe5 21. Rxe5 f6 22. Re4 Qc5 23. Qb3+ Rf7 24. gxf6 Nxf6 25. Rf4 Qe7 26. Rd1 Raf8 27. Rd3 Nh5 28. Re3 Qd7 29. Rfe4 Kh8 30. Re2 Nxg3 31. fxg3 Qh3 0-1

[Event "NED-chT"]
[Site "Netherlands"]
[Date "1987.??.??"]
[Round "?"]
[White "Kerkhoff, Leo"]
[Black "Booij, Johan"]
[Result "1-0"]
[ECO "B63"]
[WhiteElo "2215"]
[PlyCount "93"]
[EventDate "1987.??.??"]
[EventType "team"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1997"]
[Source "ChessBase"]
[SourceDate "1996.11.15"]
[SourceVersion "1"]
[SourceVersionDate "1996.11.15"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 Nxd4 8. Qxd4 Bd7 9. 0-0-0 Qa5 10. f4 Bc6 11. Bxf6 gxf6 12. Kb1 Rg8 13. f5 Qe5 14. Qf2 Be7 15. Bd3 Kf8 16. g3 Bd8 17. Qd2 Ba5 18. Qh6+ Rg7 19. Ne2 exf5 20. exf5 Bxh1 21. Rxh1 Bb6 22. g4 Be3 23. Qh3 Re8 24. Qf3 Re7 25. h4 Bb6 26. g5 Rg8 27. Qh5 Be3 28. Qh6+ Ke8 29. Qxh7 Rf8 30. Qg7 fxg5 31. f6 Re6 32. hxg5 Qxg5 33. Bb5+ Qxb5 34. Qxf8+ Kd7 35. Qxf7+ Kc6 36. Qxe6 Qxe2 37. f7 Qf3 38. Qc4+ Bc5 39. Re1 Qf2 40. Qe4+ Kb6 41. f8Q Qxf8 42. a4 Qf2 43. Rd1 Qg3 44. Qc4 Qf3 45. Rd3 Qh1+ 46. Ka2 Qc6 47. b4 1-0

[Event "FRG Hochschul-ch"]
[Site "Aachen"]
[Date "1982.??.??"]
[Round "3.1"]
[White "Grzesik, Thomas"]
[Black "Kerkhoff, Leo"]
[Result "1-0"]
[ECO "C68"]
[WhiteElo "2310"]
[BlackElo "2270"]
[PlyCount "87"]
[EventDate "1982.11.??"]
[EventType "team"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. 0-0 Bg4 6. h3 Bh5 7. g4 Bg6 8. Nxe5 Qh4 9. Qf3 Bd6 10. Nxg6 hxg6 11. Kg2 0-0-0 12. d3 f5 13. gxf5 Rf8 14. Qg4 gxf5 15. Qxh4 Rxh4 16. Nc3 f4 17. f3 Rf6 18. Rh1 Rg6+ 19. Kf1 Rg3 20. Ne2 Rgxh3 21. Rxh3 Rxh3 22. Kg2 Rh4 23. d4 g5 24. Bd2 Kd7 25. Rh1 Rxh1 26. Kxh1 c5 27. c3 b5 28. b4 cxb4 29. cxb4 Bf8 30. Bc3 Bg7 31. Nc1 Ne7 32. Nd3 Nc6 33. Nc5+ Kd6 34. Nb3 Nd8 35. Kg2 Ne6 36. Kh3 Ke7 37. Kg4 Kd6 38. Kf5 Ke7 39. Nc5 Bxd4 40. Nxe6 Bxc3 41. Nxc7 g4 42. Nd5+ Kd6 43. Nxc3 gxf3 44. e5+ 1-0

[Event "EU-Cup 03rd round of 32"]
[Site "Nordre"]
[Date "1980.??.??"]
[Round "1.2"]
[White "Kerkhoff, Leo"]
[Black "Bang, Erik BH"]
[Result "0-1"]
[ECO "C84"]
[BlackElo "2275"]
[PlyCount "158"]
[EventDate "1980.??.??"]
[EventType "team-match"]
[EventRounds "2"]
[EventCountry "DEN"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Rotterdam Volmac"]
[BlackTeam "Nordre"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "DEN"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d4 exd4 5. 0-0 a6 6. Ba4 Be7 7. Re1 0-0 8. e5 Ne8 9. c3 dxc3 10. Nxc3 d6 11. exd6 Nxd6 12. Nd5 Bf6 13. Nxf6+ Qxf6 14. Bg5 Qg6 15. Bxc6 bxc6 16. Be7 Re8 17. Bxd6 Rxe1+ 18. Qxe1 Qxd6 19. Rd1 Qf8 20. Qe4 Bb7 21. Ng5 g6 22. Qh4 h6 23. Ne4 c5 24. Nf6+ Kg7 25. Ng4 h5 26. Qf6+ Kg8 27. Ne5 Re8 28. Nd7 Qe7 29. h3 Qe2 30. Rf1 Qd2 31. Nxc5 Bxg2 32. Kxg2 Qd5+ 33. Qf3 Qxc5 34. Rd1 Qe7 35. Rd5 Qe6 36. b4 Qe4 37. Qxe4 Rxe4 38. a3 Rc4 39. Ra5 Rc6 40. Kf3 Kf8 41. Ke4 Ke7 42. f4 Re6+ 43. Kf3 Rc6 44. Kg3 f6 45. Kh4 Kf7 46. Kg3 Ke7 47. Kh4 Rc4 48. Rxa6 Rxf4+ 49. Kg3 Rc4 50. b5 Rc3+ 51. Kg2 h4 52. a4 g5 53. Ra8 Ra3 54. Kh2 Rb3 55. Rb8 Rb2+ 56. Kg1 Ra2 57. Ra8 Kd6 58. Ra7 Ra3 59. Kg2 f5 60. Ra6+ Ke5 61. Rc6 Rxa4 62. Rxc7 Rb4 63. Rc5+ Ke4 64. Kg1 Rb2 65. Kf1 g4 66. Kg1 g3 67. Rc4+ Ke3 68. Rc3+ Kd4 69. Ra3 Rxb5 70. Ra4+ Ke3 71. Ra3+ Kf4 72. Ra4+ Kg5 73. Ra8 Rb2 74. Rg8+ Kf4 75. Ra8 Rh2 76. Rh8 Rxh3 77. Rh7 Rh2 78. Rh8 Rc2 79. Ra8 Kg4 0-1

[Event "EU-Cup 03rd round of 32"]
[Site "Nordre"]
[Date "1980.??.??"]
[Round "1.1"]
[White "Kristensen, Leif"]
[Black "Kerkhoff, Leo"]
[Result "1-0"]
[ECO "C25"]
[WhiteElo "2220"]
[PlyCount "115"]
[EventDate "1980.??.??"]
[EventType "team-match"]
[EventRounds "2"]
[EventCountry "DEN"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Nordre"]
[BlackTeam "Rotterdam Volmac"]
[WhiteTeamCountry "DEN"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nc3 Nc6 3. Bc4 Bc5 4. Qg4 g6 5. Qf3 Nf6 6. Nge2 0-0 7. d3 Nd4 8. Nxd4 exd4 9. Bg5 dxc3 10. Bxf6 cxb2 11. Bxb2 Bb4+ 12. Kf1 c6 13. Qf4 d5 14. exd5 Bd6 15. Qd4 f6 16. dxc6+ Kg7 17. h4 Qc7 18. h5 Be5 19. Qc5 Re8 20. Bxe5 Qxe5 21. Qxe5 fxe5 22. hxg6 hxg6 23. Bd5 Re7 24. Rb1 Rb8 25. cxb7 Bxb7 26. Rh4 a5 27. Rb6 Bxd5 28. Rxb8 Bxa2 29. Ra4 Bf7 30. Rxa5 e4 31. Rc5 exd3 32. cxd3 Rd7 33. Ke2 Be6 34. Ke3 Bf5 35. d4 Re7+ 36. Re5 Ra7 37. f3 Ra3+ 38. Kf4 Kf6 39. Rb6+ Kg7 40. g4 Bd3 41. Re7+ Kf8 42. Rc7 Ra8 43. Kg5 Rd8 44. Rbb7 Ba6 45. Ra7 Bd3 46. Rh7 Bc4 47. d5 Bxd5 48. Rhd7 Rxd7 49. Rxd7 Bxf3 50. Rd6 Be4 51. Rxg6 Kf7 52. Ra6 Kg7 53. Ra7+ Kh8 54. Kf6 Bf3 55. g5 Bd5 56. Rd7 Bc4 57. Rd4 Ba2 58. g6 1-0

[Event "NED-chT"]
[Site "Netherlands"]
[Date "1980.??.??"]
[Round "9"]
[White "Van Mil, Johan"]
[Black "Kerkhoff, Leo"]
[Result "1-0"]
[ECO "E90"]
[PlyCount "62"]
[EventDate "1980.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 Nbd7 7. Be3 Ng4 8. Bg5 h6 9. Bh4 c5 10. d5 a6 11. 0-0 Rb8 12. a4 Ngf6 13. Nd2 Ne8 14. f4 Nc7 15. e5 g5 16. fxg5 Nxe5 17. gxh6 Bxh6 18. Nf3 Ng6 19. Bd3 f5 20. Bg5 Bg7 21. Nh4 Nxh4 22. Bxh4 Qe8 23. Rf3 e5 24. dxe6 Bxe6 25. Qf1 Qf7 26. Re1 Rbe8 27. Kh1 d5 28. cxd5 Nxd5 29. Rxe6 Qxe6 30. Nxd5 Bxb2 31. Nc7 Qh6 1-0

[Event "Lloyds Bank op-03"]
[Site "London"]
[Date "1979.??.??"]
[Round "9"]
[White "Harman, Ronald FA"]
[Black "Kerkhoff, Leo"]
[Result "1-0"]
[ECO "C46"]
[PlyCount "53"]
[EventDate "1979.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ENG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 g6 4. d4 exd4 5. Nd5 Bg7 6. Bg5 Nce7 7. Nxd4 c6 8. Nc3 h6 9. Bh4 Qa5 10. Be2 d5 11. 0-0 dxe4 12. Nb3 Qe5 13. Bg3 Qf5 14. f3 e3 15. Ne4 Qd5 16. Qe1 Qh5 17. Nd6+ Kf8 18. Bc4 Nd5 19. Bxd5 Qxd5 20. Rd1 Qg5 21. h4 Qf6 22. Qxe3 Ne7 23. Ne4 Nf5 24. Qc5+ Kg8 25. Nxf6+ Bxf6 26. Be5 Be7 27. Qxe7 1-0

[Event "Lloyds Bank op-03"]
[Site "London"]
[Date "1979.??.??"]
[Round "7"]
[White "Kerkhoff, Leo"]
[Black "Leow, Leslie M"]
[Result "0-1"]
[ECO "B99"]
[BlackElo "2280"]
[PlyCount "118"]
[EventDate "1979.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ENG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Qc7 9. 0-0-0 Nbd7 10. Bd3 h6 11. Bh4 g5 12. fxg5 Ne5 13. Qe2 Nfg4 14. h3 hxg5 15. Bg3 Nf6 16. Rhf1 Bd7 17. Qf2 0-0-0 18. Nf3 Nh5 19. Kb1 Rh7 20. Bh2 Bf6 21. Nxe5 Bxe5 22. Bxe5 dxe5 23. g3 Rf8 24. Be2 f6 25. Bg4 Kb8 26. Rd3 Ng7 27. Rfd1 Bc6 28. Qc5 Rhh8 29. Rd6 Rd8 30. a4 Rxd6 31. Rxd6 f5 32. Be2 Rxh3 33. Qxe5 Bd7 34. Qd4 Kc8 35. Rb6 Bc6 36. a5 Rxg3 37. exf5 Nxf5 38. Qh8+ Kd7 39. Bxa6 bxa6 40. Qh7+ Ne7 41. Rxa6 Bb7 42. Rb6 Rg1+ 43. Ka2 Qc4+ 44. Rb3 Ba6 45. Qh2 Rg4 46. Qf2 Nc6 47. Qf7+ Ne7 48. Qf2 Ke8 49. Ka3 Rd4 50. Rb8+ Kd7 51. Qf8 Qc5+ 52. Ka2 Qxa5+ 53. Kb1 Nc6 54. Qe8+ Kd6 55. Qf8+ Kc7 56. Nb5+ Bxb5 57. Qc8+ Kd6 58. Qf8+ Ke5 59. Qc5+ Ke4 0-1

[Event "Lloyds Bank op-03"]
[Site "London"]
[Date "1979.??.??"]
[Round "3"]
[White "Kerkhoff, Leo"]
[Black "Yeo, Michael J"]
[Result "1-0"]
[ECO "C71"]
[BlackElo "2200"]
[PlyCount "67"]
[EventDate "1979.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ENG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. d4 b5 6. Bb3 Nxd4 7. Nxd4 exd4 8. c3 dxc3 9. Nxc3 Nf6 10. e5 dxe5 11. Bxf7+ Ke7 12. Qb3 c5 13. Bd5 c4 14. Qd1 Nxd5 15. Qf3 Rb8 16. Bg5+ Nf6 17. Rd1 Qe8 18. Bxf6+ gxf6 19. Nd5+ Kf7 20. Nxf6 Bb4+ 21. Kf1 Qe6 22. Nd7+ Ke7 23. Nxb8 e4 24. Qg3 Rf8 25. Qc7+ Kf6 26. Nc6 e3 27. Nd4 Qg4 28. f3 Kg6 29. Qe5 Qg5 30. Qe4+ Bf5 31. Nxf5 Qxf5 32. Qxe3 Rf6 33. h4 h6 34. Qe8+ 1-0

[Event "Lloyds Bank op-03"]
[Site "London"]
[Date "1979.??.??"]
[Round "2"]
[White "Petursson, Margeir"]
[Black "Kerkhoff, Leo"]
[Result "1-0"]
[ECO "E92"]
[WhiteElo "2420"]
[PlyCount "83"]
[EventDate "1979.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ENG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Nf3 e5 7. dxe5 dxe5 8. Qxd8 Rxd8 9. Bg5 Re8 10. Nd5 Nxd5 11. cxd5 c6 12. Bc4 cxd5 13. Bxd5 Na6 14. Ke2 Nb4 15. Bb3 Bd7 16. Rhc1 Rac8 17. Nd2 Nc6 18. Be3 Nd4+ 19. Bxd4 exd4 20. Kd3 Bh6 21. Rxc8 Rxc8 22. Bd5 Kf8 23. a4 b5 24. axb5 Bxb5+ 25. Bc4 Bxd2 26. Bxb5 Rb8 27. Bc4 Rxb2 28. Rxa7 Be1 29. Rxf7+ Ke8 30. Kxd4 Rxf2 31. Rxh7 Rxg2 32. Kd5 Rb2 33. e5 g5 34. Ke6 Rb6+ 35. Kf5 Bd2 36. Be6 Rb4 37. Bf7+ Kf8 38. e6 Rh4 39. Bh5 Bb4 40. Kf6 Be7+ 41. Kg6 Bd6 42. e7+ 1-0

[Event "Lloyds Bank op-03"]
[Site "London"]
[Date "1979.??.??"]
[Round "8"]
[White "Stebbings, Anthony"]
[Black "Kerkhoff, Leo"]
[Result "1/2-1/2"]
[ECO "C74"]
[PlyCount "42"]
[EventDate "1979.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ENG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 f5 6. exf5 Bxf5 7. d4 e4 8. Ng5 d5 9. f3 h6 10. fxe4 hxg5 11. exf5 Bd6 12. Qg4 Nf6 13. Qxg5 Kf8 14. h3 Rh5 15. Qe3 Ng4 16. Qf3 Qh4+ 17. Kf1 Re8 18. Bd2 Nge5 19. dxe5 Nxe5 20. Qf4 Ng4 21. Qf3 Ne5 1/2-1/2

[Event "NED corr"]
[Site "Netherlands"]
[Date "1976.??.??"]
[Round "?"]
[White "De Ruiter"]
[Black "Kerkhoff, Leo"]
[Result "0-1"]
[ECO "C73"]
[PlyCount "50"]
[EventDate "1976.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr 2000"]
[Source "ChessBase"]
[SourceDate "2000.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. Bxc6+ bxc6 6. d4 f6 7. 0-0 Ne7 8. c4 Ng6 9. Nc3 Be7 10. Be3 0-0 11. Qa4 Bd7 12. Qa5 Kh8 13. c5 d5 14. Nd2 f5 15. dxe5 f4 16. Bd4 f3 17. exd5 Bg5 18. Nce4 cxd5 19. Ng3 Bxd2 20. Qxd2 Nh4 21. Rfd1 fxg2 22. Qc3 Nf3+ 23. Kxg2 Qh4 24. e6 Qxh2+ 25. Kf1 Bb5+ 0-1

[Event "Netherlands"]
[Site "Netherlands"]
[Date "1973.??.??"]
[Round "?"]
[White "Zuidema, Coen"]
[Black "Kerkhoff, Leo"]
[Result "1-0"]
[ECO "C72"]
[PlyCount "89"]
[EventDate "1973.??.??"]
[EventType "game"]
[EventRounds "1"]
[EventCountry "NED"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. 0-0 Bg4 6. h3 h5 7. d4 b5 8. Bb3 Nxd4 9. hxg4 hxg4 10. Ng5 Nh6 11. f4 d5 12. Bxd5 Bc5 13. Be3 Qd6 14. Re1 0-0-0 15. b4 Nf3+ 16. Nxf3 Bxe3+ 17. Rxe3 Qb6 18. Nd4 exf4 19. Rc3 Nf5 20. Rc5 Ne3 21. Rc6 Nxd1 22. Rxb6 cxb6 23. Nd2 Ne3 24. Nc6 Rd6 25. Ne5 Rdh6 26. Kf2 Rh2 27. Rg1 Nxg2 28. Nxg4 Ne3+ 29. Nxh2 Rxh2+ 30. Ke1 Nxc2+ 31. Kd1 Ne3+ 32. Kc1 Nxd5 33. exd5 g6 34. Rg4 Rh5 35. Rxf4 Rxd5 36. Rxf7 Rd4 37. Rf6 Rxb4 38. Rxb6 Ra4 39. Kb2 g5 40. Nb3 g4 41. Rg6 g3 42. Rxg3 Rb4 43. Rg6 a5 44. Rd6 a4 45. Rd4 1-0

[Event "NED Team-ch"]
[Site "Netherlands"]
[Date "1972.??.??"]
[Round "?"]
[White "Dekker, Kees"]
[Black "Kerkhoff, Leo"]
[Result "1-0"]
[ECO "C72"]
[PlyCount "61"]
[EventDate "1972.??.??"]
[EventType "team"]
[EventRounds "9"]
[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 d6 5. 0-0 Bg4 6. h3 h5 7. d4 b5 8. Bb3 Nxd4 9. hxg4 hxg4 10. Ng5 Nh6 11. f4 d5 12. Bxd5 Bc5 13. Be3 Qd6 14. b4 Bb6 15. Nxf7 Nxf7 16. Bxf7+ Kf8 17. Qxg4 exf4 18. Bd5 f3 19. Nd2 Qh2+ 20. Kf2 fxg2 21. Qxg2 Ke7 22. Qxh2 Rxh2+ 23. Kg3 Rah8 24. Bg5+ Ke8 25. Nf3 Ne2+ 26. Kg4 Rg2+ 27. Kf5 Ng3+ 28. Ke6 Nxf1 29. Rxf1 Bf2 30. Rd1 Rxg5 31. Bc6+ 1-0

[Event "NED-ch25"]
[Site "Leeuwarden"]
[Date "1970.04.04"]
[Round "11"]
[White "Kerkhoff, Leo"]
[Black "Vogel, Jaap"]
[Result "1/2-1/2"]
[ECO "C00"]
[PlyCount "80"]
[EventDate "1970.03.23"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 e6 2. d3 d5 3. Nd2 Nf6 4. Ngf3 Bc5 5. e5 Nfd7 6. g3 Be7 7. Bg2 c5 8. 0-0 Nc6 9. Re1 Qc7 10. Qe2 b6 11. c3 Bb7 12. Nf1 h6 13. h4 0-0-0 14. a3 Na5 15. Bf4 c4 16. d4 Kb8 17. Ne3 Rdg8 18. Nf5 Bf8 19. Nd6 Bxd6 20. exd6 Qd8 21. h5 Ka8 22. Rab1 Rf8 23. Nd2 Nf6 24. b3 cxb3 25. c4 dxc4 26. Bxb7+ Kxb7 27. Nxc4 Nxc4 28. Qxc4 Nd5 29. Rec1 Qd7 30. Qxb3 Rc8 31. Qf3 Rxc1+ 32. Rxc1 Rc8 33. Rc7+ Rxc7 34. dxc7 Kc8 35. Qd3 Nxc7 36. Qh7 f6 37. Bxh6 gxh6 38. Qxh6 Qxd4 39. Qh8+ Kb7 40. h6 Qd1+ 1/2-1/2

[Event "NED-ch25"]
[Site "Leeuwarden"]
[Date "1970.04.02"]
[Round "10"]
[White "Zuidema, Coen"]
[Black "Kerkhoff, Leo"]
[Result "1-0"]
[ECO "C26"]
[PlyCount "59"]
[EventDate "1970.03.23"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. g3 Bc5 4. Bg2 Nc6 5. Nge2 d6 6. 0-0 Bg4 7. h3 Be6 8. Nd5 Qd7 9. Kh2 h5 10. c3 h4 11. g4 Bxd5 12. exd5 Ne7 13. d4 Bb6 14. c4 Ng6 15. Bg5 Nxg4+ 16. hxg4 Qxg4 17. Be3 h3 18. Bh1 exd4 19. Nxd4 Ne5 20. Qxg4 Nxg4+ 21. Kg3 Nxe3 22. fxe3 Bxd4 23. exd4 f6 24. Be4 Kf7 25. Bf5 Rh5 26. Be6+ Kg6 27. Rh1 Rg5+ 28. Kf3 f5 29. Rxh3 Kf6 30. Rah1 1-0

[Event "NED-ch25"]
[Site "Leeuwarden"]
[Date "1970.04.01"]
[Round "9"]
[White "Kerkhoff, Leo"]
[Black "Jongsma, Alexander"]
[Result "1/2-1/2"]
[ECO "A05"]
[PlyCount "37"]
[EventDate "1970.03.23"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nf6 3. d3 Nc6 4. Nbd2 g6 5. g3 Bg7 6. Bg2 0-0 7. 0-0 d6 8. c3 Rb8 9. a4 a6 10. h3 Qc7 11. Nh4 b5 12. f4 b4 13. c4 Nd4 14. Ndf3 Nd7 15. g4 b3 16. Nxd4 cxd4 17. Qf3 a5 18. f5 Nc5 19. g5 1/2-1/2

[Event "NED-ch25"]
[Site "Leeuwarden"]
[Date "1970.03.31"]
[Round "8"]
[White "Hartoch, Robert G"]
[Black "Kerkhoff, Leo"]
[Result "1/2-1/2"]
[ECO "E69"]
[PlyCount "64"]
[EventDate "1970.03.23"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. c4 g6 2. d4 Nf6 3. Nf3 Bg7 4. g3 0-0 5. Bg2 d6 6. 0-0 Nbd7 7. Nc3 c6 8. e4 e5 9. Rb1 a5 10. h3 exd4 11. Nxd4 Re8 12. Bf4 Ne5 13. b3 Nfd7 14. Be3 Nc5 15. Qc2 Qe7 16. Rbd1 a4 17. Rfe1 axb3 18. axb3 Na6 19. Na2 Nd7 20. Kh2 Nf6 21. Bf4 Nh5 22. Bc1 Nc5 23. Nc3 Ne6 24. Nde2 Nc5 25. Nf4 Nxf4 26. Bxf4 Be5 27. Bc1 Qc7 28. b4 Na6 29. Na2 Qb6 30. f4 Bg7 31. Be3 Nxb4 32. Qb1 c5 1/2-1/2

[Event "NED-ch25"]
[Site "Leeuwarden"]
[Date "1970.03.30"]
[Round "7"]
[White "Kerkhoff, Leo"]
[Black "Langeweg, Kick"]
[Result "0-1"]
[ECO "B49"]
[PlyCount "80"]
[EventDate "1970.03.23"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 a6 6. Be3 Qc7 7. Be2 b5 8. 0-0 Bb7 9. Nxc6 Bxc6 10. Qd4 b4 11. Nb1 e5 12. Qb6 Qxb6 13. Bxb6 Bxe4 14. Nd2 Bc6 15. Nc4 f6 16. f4 e4 17. f5 Be7 18. Bh5+ Kf8 19. Rfe1 Nh6 20. Na5 Rc8 21. Nxc6 Rxc6 22. Bf2 d5 23. Rad1 Rd6 24. Bg3 Rd8 25. Bc7 Rd7 26. Bb6 Nxf5 27. Rxe4 g6 28. Bg4 Rb7 29. Rxe7 Nxe7 30. Bc5 Kf7 31. Bxe7 Rxe7 32. Rxd5 f5 33. Bf3 Rc8 34. Ra5 Rxc2 35. h4 Rxb2 36. Rxa6 Kg7 37. Ra5 Rd7 38. h5 Rd3 39. hxg6 hxg6 40. Ra4 Ra3 0-1

[Event "NED-ch25"]
[Site "Leeuwarden"]
[Date "1970.03.28"]
[Round "6"]
[White "Scholl, Eddie C"]
[Black "Kerkhoff, Leo"]
[Result "0-1"]
[ECO "C72"]
[PlyCount "84"]
[EventDate "1970.03.23"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. 0-0 Bg4 6. h3 h5 7. d4 b5 8. Bb3 Nxd4 9. hxg4 hxg4 10. Ng5 Nh6 11. f4 d5 12. Bxd5 Bc5 13. Be3 Qd6 14. b4 Bb6 15. Nxf7 Nxf7 16. Bxf7+ Kf8 17. fxe5 Nf3+ 18. Kf2 Bxe3+ 19. Kxe3 Qb6+ 20. Ke2 Rh2 21. Qd5 Rxg2+ 22. Kd3 Ke7 23. Rxf3 Rd8 24. Qxd8+ Kxd8 25. Re3 c5 26. bxc5 Qxc5 27. Nd2 Qxe5 28. Nb3 Qc7 29. Bd5 Rxc2 30. Kd4 Qb6+ 31. Kd3 Rc3+ 32. Kxc3 Qxe3+ 33. Kb4 g3 34. Rf1 g2 35. Rf8+ Ke7 36. Rf7+ Ke8 37. Rxg7 Qe1+ 38. Ka3 g1Q 39. Rxg1 Qxg1 40. Kb4 Kd8 41. Bb7 Kc7 42. Bxa6 Kb6 0-1

[Event "NED-ch25"]
[Site "Leeuwarden"]
[Date "1970.03.27"]
[Round "5"]
[White "Kerkhoff, Leo"]
[Black "Kort, Jacob"]
[Result "1/2-1/2"]
[ECO "C44"]
[PlyCount "94"]
[EventDate "1970.03.23"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. c3 dxc3 5. Nxc3 d6 6. Bc4 Be6 7. Bxe6 fxe6 8. Qb3 Qc8 9. Ng5 Nd8 10. f4 Be7 11. f5 Bxg5 12. Bxg5 Nf7 13. fxe6 Nxg5 14. Qb5+ c6 15. Qxg5 g6 16. 0-0 Qxe6 17. e5 d5 18. Ne2 Qe7 19. Qe3 Qb4 20. Rf4 Qb6 21. Nd4 0-0-0 22. Raf1 Kb8 23. e6 Ne7 24. Qe5+ Kc8 25. Kh1 Qc7 26. Qf6 Rhe8 27. Nf3 Nf5 28. Rxf5 gxf5 29. Ng5 Qe7 30. Qxf5 h6 31. Nf7 Qxe6 32. Qxe6+ Rxe6 33. Nxd8 Kxd8 34. h4 Ke7 35. Rf3 Re4 36. g3 Re1+ 37. Kg2 Re2+ 38. Kh3 Rxb2 39. Kg4 c5 40. Kh5 Rb6 41. g4 d4 42. g5 hxg5 43. hxg5 c4 44. g6 Rxg6 45. Kxg6 c3 46. Rf4 c2 47. Re4+ Kf8 1/2-1/2

[Event "NED-ch25"]
[Site "Leeuwarden"]
[Date "1970.03.26"]
[Round "4"]
[White "Van Baarle, John"]
[Black "Kerkhoff, Leo"]
[Result "1/2-1/2"]
[ECO "E97"]
[PlyCount "42"]
[EventDate "1970.03.23"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. e4 0-0 6. Be2 e5 7. 0-0 Nc6 8. Be3 Ng4 9. Bg5 f6 10. Bh4 g5 11. Bg3 Nh6 12. dxe5 dxe5 13. Qb3 g4 14. Rad1 Bd7 15. c5+ Kh8 16. Nh4 Qc8 17. Nd5 Be6 18. Qe3 Nd4 19. f4 c6 20. Nc3 Qd8 21. Kh1 Qe7 1/2-1/2

[Event "NED-ch25"]
[Site "Leeuwarden"]
[Date "1970.03.25"]
[Round "3"]
[White "Kerkhoff, Leo"]
[Black "Marcus, Joost"]
[Result "0-1"]
[ECO "B18"]
[PlyCount "94"]
[EventDate "1970.03.23"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. f4 e6 8. h5 Bh7 9. Nf3 Nf6 10. Bd3 Bxd3 11. Qxd3 Nbd7 12. Bd2 Qc7 13. 0-0-0 c5 14. Ne5 cxd4 15. Qxd4 Bc5 16. Qa4 0-0 17. Nxd7 Nxd7 18. Rh3 Bd6 19. Ne2 Nb6 20. Qe4 Rfd8 21. Nd4 Qc4 22. Kb1 Bc5 23. Bc3 Nd5 24. Rg3 Nxc3+ 25. bxc3 Qd5 26. Qe2 Rd6 27. Rgd3 Ra6 28. Nb3 Qc6 29. Rd8+ Rxd8 30. Rxd8+ Kh7 31. Qd3+ f5 32. Qg3 g5 33. fxg5 Bd6 34. g6+ Kg7 35. Qd3 Qc7 36. Qd4+ e5 37. Qd5 Kf6 38. Qg8 Kg5 39. g7 Qxc3 40. Qf7 Qe1+ 41. Nc1 Rb6+ 42. Qb3 Ba3 43. g8Q+ Kh4 44. Qgc4+ e4 45. g3+ Kh3 46. g4+ Kh4 47. Rd1 Qxd1 0-1

[Event "NED-ch25"]
[Site "Leeuwarden"]
[Date "1970.03.24"]
[Round "2"]
[White "De Ruiter, Tom"]
[Black "Kerkhoff, Leo"]
[Result "1/2-1/2"]
[ECO "D00"]
[PlyCount "23"]
[EventDate "1970.03.23"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. f4 d5 2. Nf3 g6 3. e3 Bg7 4. d4 Nf6 5. Bd3 0-0 6. Nbd2 c5 7. c3 Qc7 8. Ne5 Nfd7 9. Qf3 Nxe5 10. fxe5 Nc6 11. 0-0 Be6 12. Qf4 1/2-1/2

[Event "NED-ch25"]
[Site "Leeuwarden"]
[Date "1970.03.23"]
[Round "1"]
[White "Van der Weide, Piet"]
[Black "Kerkhoff, Leo"]
[Result "1/2-1/2"]
[ECO "C25"]
[PlyCount "119"]
[EventDate "1970.03.23"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 g5 5. d4 Bg7 6. d5 Ne5 7. h4 h6 8. d6 c6 9. Nd4 Qf6 10. Nf5 b6 11. Qh5 Ng6 12. Bc4 Bf8 13. Bd2 Bxd6 14. Nxd6+ Qxd6 15. 0-0-0 Qe5 16. Nd5 cxd5 17. Bc3 Qxc3 18. bxc3 dxc4 19. hxg5 hxg5 20. Qxg5 Rxh1 21. Rxh1 Bb7 22. Rh7 Bxe4 23. Qb5 Rc8 24. Kb2 Nf6 25. Rh2 Ke7 26. Qa6 Rc7 27. Qa3+ d6 28. Kb1 Ng4 29. Rh1 Bxg2 30. Re1+ N6e5 31. Qc1 f3 32. Qg5+ Kd7 33. Rd1 f2 34. Qf5+ Kc6 35. Qh5 f1Q 36. Rxf1 Bxf1 37. Qh1+ Kc5 38. Qxf1 Kb5 39. Qd1 Kc6 40. Qh1+ Kd7 41. Qa8 Ke7 42. Kc1 Ke6 43. Kd2 Re7 44. Qc8+ Kd5 45. a4 Nf6 46. Ke3 Nc6+ 47. Kf3 Kc5 48. Qa6 d5 49. Qc8 Ne4 50. Qh8 Ne5+ 51. Kg2 Nxc3 52. Qf6 Re6 53. Qd8 a5 54. Kg3 Nxa4 55. Kf4 Nc3 56. Kf5 Ne4 57. Qf8+ Kd4 58. c3+ Kxc3 59. Qa3+ Kd4 60. Qe3+ 1/2-1/2

[Event "NED-chT"]
[Site "Netherlands"]
[Date "1969.??.??"]
[Round "?"]
[White "Kerkhoff, Leo"]
[Black "Piket, Joop J"]
[Result "1-0"]
[ECO "B10"]
[PlyCount "49"]
[EventDate "1969.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 c6 2. d3 g6 3. Nd2 Bg7 4. g3 d5 5. Bg2 Nh6 6. Ngf3 0-0 7. 0-0 f5 8. exd5 cxd5 9. Nb3 Nf7 10. d4 Nd7 11. Re1 Nf6 12. Ng5 Nxg5 13. Bxg5 Ne4 14. Bf4 a5 15. f3 a4 16. fxe4 axb3 17. exd5 bxa2 18. c3 Qb6 19. Rxe7 Qxb2 20. Qe1 Ra5 21. d6 Qb5 22. Bf1 Qd5 23. Rc7 Kh8 24. Qe7 Rg8 25. Be5 1-0

[Event "NED-chT"]
[Site "Netherlands"]
[Date "1969.??.??"]
[Round "?"]
[White "Kuijpers, Frans"]
[Black "Kerkhoff, Leo"]
[Result "0-1"]
[ECO "E81"]
[PlyCount "70"]
[EventDate "1969.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 c6 6. Be3 a6 7. Bd3 b5 8. Nge2 0-0 9. 0-0 e5 10. a4 b4 11. Na2 exd4 12. Bxd4 c5 13. Bf2 Nc6 14. Nac1 Ne8 15. Rb1 Nc7 16. Qd2 Ne6 17. Rd1 Qf6 18. Bc2 Rd8 19. Qe1 Bb7 20. b3 Rd7 21. Bg3 Ncd4 22. Nxd4 Nxd4 23. Qd2 h5 24. Ne2 h4 25. Bf2 Nxc2 26. Qxc2 h3 27. Rd3 hxg2 28. Bxc5 dxc5 29. Rxd7 Qxf3 30. Rxb7 Bh6 31. Nf4 Bxf4 32. Qxg2 Qe3+ 33. Kh1 Rd8 34. Rf1 Rd2 35. Rf3 Qxe4 0-1

[Event "Match/Nation GER-NED"]
[Site "Krefeld"]
[Date "1967.04.29"]
[Round "1.10"]
[White "Jahr, Ulrich"]
[Black "Kerkhoff, Leo"]
[Result "1-0"]
[ECO "C44"]
[PlyCount "81"]
[EventDate "1967.04.29"]
[EventType "team"]
[EventRounds "2"]
[EventCountry "GER"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. c3 Nf6 4. d4 Nxe4 5. d5 Bc5 6. dxc6 Bxf2+ 7. Ke2 bxc6 8. Qa4 f5 9. Nbd2 0-0 10. Nxe4 fxe4 11. Qxe4 d5 12. Qxe5 Re8 13. Qxe8+ Qxe8+ 14. Kxf2 Qe4 15. Be2 Bg4 16. Re1 Bxf3 17. Bxf3 Qh4+ 18. Kf1 Rf8 19. Be3 Qxh2 20. Bc5 Qh1+ 21. Kf2 Qh4+ 22. Kg1 Rf5 23. Re8+ Kf7 24. Rf8+ Kg6 25. Rxf5 Kxf5 26. Bxa7 g5 27. a4 g4 28. Bf2 g3 29. Be1 d4 30. Rd1 c5 31. a5 Qh2+ 32. Kf1 Qh1+ 33. Ke2 Qh4 34. a6 dxc3 35. a7 Qc4+ 36. Rd3 cxb2 37. a8Q b1Q 38. Qf8+ Kg6 39. Qe8+ Kf5 40. Qh5+ Kf6 41. Qh6+ 1-0

[Event "Match/Nation NED-ENG"]
[Site "Vlissingen"]
[Date "1966.09.17"]
[Round "1.10"]
[White "Kerkhoff, Leo"]
[Black "Whiteley, Andrew Jonathan"]
[Result "1/2-1/2"]
[ECO "B79"]
[PlyCount "179"]
[EventDate "1966.09.17"]
[EventType "team-match"]
[EventRounds "2"]
[EventCountry "NED"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]
[WhiteTeam "Netherlands"]
[BlackTeam "England"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "ENG"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 Nc6 8. Qd2 0-0 9. Bc4 Bd7 10. Bb3 Qa5 11. h4 Ne5 12. h5 Nxh5 13. g4 Nf6 14. 0-0-0 Rfc8 15. Bh6 Bxh6 16. Rxh6 Rxc3 17. bxc3 Rc8 18. Kb2 Nc4+ 19. Bxc4 Rxc4 20. Nb3 Qe5 21. Qe3 Bxg4 22. Rd4 d5 23. Rh1 Bd7 24. f4 Qe6 25. f5 Qe5 26. Nd2 Rc5 27. Nf3 Qc7 28. e5 Rb5+ 29. Kc1 Qb6 30. exf6 Rb1+ 31. Kd2 Rxh1 32. Qxe7 gxf5 33. Qxd7 Qxf6 34. Qxd5 Qh6+ 35. Ke2 Qg6 36. Qd8+ Kg7 37. Qg5 Rh2+ 38. Kd3 Rf2 39. Qxg6+ hxg6 40. Ne1 f4 41. c4 g5 42. Kc3 Re2 43. Nf3 g4 44. Nh4 Rf2 45. c5 g3 46. Rd7 Rh2 47. Nf3 g2 48. Rd2 Kf6 49. Ng1 Kf5 50. Kd3 Kg4 51. Ke2 Rh5 52. Kf2 Rxc5 53. Kxg2 Rc3 54. Kf2 Ra3 55. c4 Rc3 56. Rd4 Rc2+ 57. Ne2 Rxa2 58. Rxf4+ Kg5 59. Rxf7 Rc2 60. Rc7 Kf6 61. Ke3 Ke5 62. Kd3 Rb2 63. Nc3 Kd6 64. Rh7 a6 65. Ne4+ Kc6 66. Kd4 Rg2 67. Rh6+ Kc7 68. Kd5 Rg7 69. Nc5 Rg5+ 70. Kd4 Rg4+ 71. Kc3 Rg3+ 72. Kb4 Rg1 73. Rh7+ Kc6 74. Nb3 b6 75. Nd4+ Kd6 76. Nf5+ Ke6 77. Ne3 Rb1+ 78. Kc3 Ke5 79. Re7+ Kd6 80. Ra7 b5 81. Rxa6+ Kc5 82. Kc2 Rb4 83. Ra5 Kb6 84. Ra1 Kc5 85. Ra5 Kb6 86. Ra3 Kc5 87. Kc3 Rxc4+ 88. Nxc4 b4+ 89. Kb3 bxa3 90. Nxa3 1/2-1/2

[Event "Ivan Parcetic Memorial-02"]
[Site "Sombor"]
[Date "1966.09.09"]
[Round "13"]
[White "Kerkhoff, Leo"]
[Black "Malich, Burkhard"]
[Result "0-1"]
[ECO "B82"]
[PlyCount "106"]
[EventDate "1966.08.25"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "YUG"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 d6 6. Be3 Nf6 7. f4 Be7 8. Qf3 e5 9. Nxc6 bxc6 10. fxe5 dxe5 11. Bc4 0-0 12. 0-0 Ng4 13. Bxf7+ Kh8 14. Qe2 Nxe3 15. Qxe3 Ba6 16. Rf3 Qd4 17. Qxd4 exd4 18. Na4 Be2 19. Rf2 Bb5 20. Bb3 Rxf2 21. Kxf2 Rf8+ 22. Kg1 c5 23. c4 Bc6 24. Re1 g6 25. h3 Rb8 26. Rf1 Kg7 27. Bd1 Rf8 28. Rxf8 Bxf8 29. Bc2 d3 30. Bd1 Kf6 31. Kf2 Ke5 32. Nc3 Kd4 33. Ba4 Bxa4 34. Nxa4 Kxc4 35. e5 Kd5 36. e6 c4 37. b3 cxb3 38. axb3 Kd4 39. Ke1 Bb4+ 40. Kf2 Be7 41. Kf3 h5 42. g4 hxg4+ 43. hxg4 Bh4 44. Kf4 d2 45. Nb2 Be7 46. Nd1 Kd3 47. Kf3 a5 48. Kf2 Bc5+ 49. Kf3 g5 50. e7 Bxe7 51. Nf2+ Kc2 52. Ke2 Bc5 53. Nd1 Bd4 0-1

[Event "Ivan Parcetic Memorial-02"]
[Site "Sombor"]
[Date "1966.09.07"]
[Round "12"]
[White "Minev, Nikolay Nikolaev"]
[Black "Kerkhoff, Leo"]
[Result "1/2-1/2"]
[ECO "C46"]
[PlyCount "35"]
[EventDate "1966.08.25"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "YUG"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 g6 4. d4 exd4 5. Nxd4 Bg7 6. Be3 Nge7 7. Be2 0-0 8. 0-0 d5 9. exd5 Nb4 10. Ndb5 Nexd5 11. Bc5 Re8 12. Nxd5 Nxd5 13. Bf3 a6 14. Bxd5 axb5 15. Qf3 Qf6 16. Rfe1 Bd7 17. Qxf6 Bxf6 18. c3 1/2-1/2

[Event "Ivan Parcetic Memorial-02"]
[Site "Sombor"]
[Date "1966.09.06"]
[Round "11"]
[White "Buljovcic, Ivan"]
[Black "Kerkhoff, Leo"]
[Result "1/2-1/2"]
[ECO "C50"]
[PlyCount "49"]
[EventDate "1966.08.25"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "YUG"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. Nf3 d6 6. h3 Ne7 7. 0-0 Ng6 8. d4 exd4 9. Nxd4 0-0 10. Nb3 Bb6 11. Re1 a6 12. Be3 Bxe3 13. Rxe3 Nf4 14. Ne2 N6h5 15. Nxf4 Nxf4 16. Qd4 Be6 17. Rae1 Qg5 18. Rg3 Qe5 19. Bxe6 Nxe6 20. Qxe5 dxe5 21. Rd3 Rfd8 22. Rd5 f6 23. Red1 b6 24. c4 c5 25. Rxd8+ 1/2-1/2

[Event "Ivan Parcetic Memorial-02"]
[Site "Sombor"]
[Date "1966.09.05"]
[Round "10"]
[White "Kerkhoff, Leo"]
[Black "Minic, Dragoljub"]
[Result "0-1"]
[ECO "B49"]
[PlyCount "66"]
[EventDate "1966.08.25"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "YUG"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Be2 Nf6 6. Nc3 Qc7 7. 0-0 Nc6 8. Be3 Bb4 9. Nxc6 bxc6 10. Na4 Bd6 11. f4 Nxe4 12. Nb6 Rb8 13. Nc4 Be7 14. Qd4 Nf6 15. f5 e5 16. Nxe5 Rb4 17. Nc4 d5 18. a3 Rxc4 19. Bxc4 dxc4 20. Qxc4 0-0 21. Bc5 Ng4 22. g3 Ne5 23. Qc3 Bxc5+ 24. Qxc5 Nd7 25. Qe7 Qb6+ 26. Rf2 Nf6 27. Qb4 Qa7 28. Re1 Bxf5 29. Re7 Bd7 30. Qd2 Nd5 31. Re1 Be6 32. c4 Nf6 33. h3 Bxh3 0-1

[Event "Ivan Parcetic Memorial-02"]
[Site "Sombor"]
[Date "1966.09.03"]
[Round "9"]
[White "Maric, Rudolf"]
[Black "Kerkhoff, Leo"]
[Result "1/2-1/2"]
[ECO "C71"]
[PlyCount "31"]
[EventDate "1966.08.25"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "YUG"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c4 Bg4 6. h3 Bxf3 7. Qxf3 g6 8. d3 Bg7 9. Nc3 Nge7 10. Nd5 0-0 11. Nxe7+ Qxe7 12. Bxc6 bxc6 13. 0-0 Rab8 14. Rb1 Qd7 15. Qe2 f5 16. Bd2 1/2-1/2

[Event "Ivan Parcetic Memorial-02"]
[Site "Sombor"]
[Date "1966.09.02"]
[Round "8"]
[White "Kerkhoff, Leo"]
[Black "Radojevic, Miomir"]
[Result "1-0"]
[ECO "B33"]
[PlyCount "83"]
[EventDate "1966.08.25"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "YUG"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Bxf6 gxf6 9. Na3 d5 10. Nxd5 Be6 11. Nc4 f5 12. Ncb6 Rb8 13. exf5 Bxf5 14. Bd3 Be6 15. Qf3 Bg7 16. c3 0-0 17. g4 Qh4 18. Rg1 e4 19. Bxe4 Ne5 20. Qg3 Qxg3 21. Rxg3 Rfe8 22. 0-0-0 Ng6 23. Bxg6 hxg6 24. f4 Rbd8 25. f5 gxf5 26. gxf5 Bxf5 27. Ne7+ Rxe7 28. Rxd8+ Kh7 29. Kd1 Re6 30. Nd5 Rh6 31. Ne3 Bg6 32. Rg2 Rh3 33. Ke2 Bh5+ 34. Kd3 Bh6 35. Re8 Bg6+ 36. Ke2 Bf4 37. Nf1 Bh5+ 38. Kf2 Bc7 39. Rgg8 Be5 40. Rg5 f6 41. Rgxe5 fxe5 42. Rxe5 1-0

[Event "Ivan Parcetic Memorial-02"]
[Site "Sombor"]
[Date "1966.09.01"]
[Round "7"]
[White "Blatny, Frantisek"]
[Black "Kerkhoff, Leo"]
[Result "0-1"]
[ECO "C71"]
[PlyCount "64"]
[EventDate "1966.08.25"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "YUG"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. d4 b5 6. Bb3 Nxd4 7. Nxd4 exd4 8. c3 dxc3 9. Nxc3 Nf6 10. 0-0 Be7 11. a4 Rb8 12. axb5 axb5 13. Qd3 Nd7 14. Qg3 0-0 15. Nd5 Bh4 16. Qc3 Nc5 17. Bc2 c6 18. Nb4 Bf6 19. Qg3 Bb7 20. Rd1 Re8 21. Rxd6 Qe7 22. Nxc6 Bxc6 23. Rxc6 Nxe4 24. Qd3 Rbd8 25. Qxb5 Bd4 26. Be3 Bxe3 27. fxe3 Rd2 28. Rc7 Qd8 29. Qc4 Rxg2+ 30. Kxg2 Qg5+ 31. Kf1 Nd2+ 32. Ke2 Qxe3+ 0-1

[Event "Ivan Parcetic Memorial-02"]
[Site "Sombor"]
[Date "1966.08.31"]
[Round "6"]
[White "Kerkhoff, Leo"]
[Black "Karaklajic, Nikola"]
[Result "0-1"]
[ECO "C56"]
[PlyCount "96"]
[EventDate "1966.08.25"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "YUG"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Nf6 5. 0-0 Nxe4 6. Re1 d5 7. Bxd5 Qxd5 8. Nc3 Qa5 9. Nxe4 Be6 10. Bd2 Bb4 11. Nxd4 Bxd2 12. Nxc6 bxc6 13. Qxd2 Qxd2 14. Nxd2 0-0-0 15. Nb3 Rhe8 16. Rad1 Rxd1 17. Rxd1 Bf5 18. Rc1 Bxc2 19. Nd4 Ba4 20. b3 c5 21. Nf3 Bc6 22. Rxc5 Bxf3 23. gxf3 Re2 24. Ra5 Kb7 25. Kg2 Kb6 26. b4 Rc2 27. Rh5 Rxa2 28. Rxh7 Rb2 29. Rxg7 Rxb4 30. Rxf7 a5 31. Rf8 a4 32. Rb8+ Kc5 33. Ra8 Kd5 34. f4 c5 35. h4 c4 36. h5 c3 37. h6 Rb7 38. Rxa4 c2 39. Ra1 Rb1 40. Ra5+ Kd6 41. h7 c1Q 42. h8Q Qg1+ 43. Kf3 Qd1+ 44. Kg3 Qg1+ 45. Kf3 Rb3+ 46. Ke2 Qg4+ 47. Kd2 Qxf4+ 48. Ke1 Qe4+ 0-1

[Event "Ivan Parcetic Memorial-02"]
[Site "Sombor"]
[Date "1966.08.29"]
[Round "5"]
[White "Barczay, Laszlo"]
[Black "Kerkhoff, Leo"]
[Result "1-0"]
[ECO "A04"]
[PlyCount "107"]
[EventDate "1966.08.25"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "YUG"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 f5 2. e4 fxe4 3. Ng5 Nf6 4. d3 d5 5. dxe4 e5 6. exd5 Bc5 7. Nc3 0-0 8. f3 h6 9. Nge4 Bb6 10. Bc4 Nxe4 11. Nxe4 Qh4+ 12. g3 Qh5 13. h3 Bf5 14. Bd3 Nd7 15. Qe2 Nf6 16. Bd2 Bxe4 17. fxe4 Qxe2+ 18. Kxe2 Nh5 19. Be1 Rf6 20. Rf1 Raf8 21. Rxf6 Rxf6 22. Rd1 Bd4 23. c3 Bg1 24. Bc4 Kh7 25. Rd3 Bh2 26. Rf3 Rg6 27. g4 Nf4+ 28. Kd1 h5 29. gxh5 Rg2 30. Rf2 Rxf2 31. Bxf2 a6 32. Ba7 Nxh3 33. Bb8 Kh6 34. Ke2 Nf4+ 35. Kf1 Kxh5 36. Bxc7 b5 37. Bb3 Nd3 38. Bb6 Bf4 39. d6 Nxb2 40. d7 Bg5 41. Ke2 Kg4 42. Be6+ Kg3 43. Bb3 Bf6 44. d8Q Bxd8 45. Bxd8 Kf4 46. Be7 Kxe4 47. Ba3 Nc4 48. Bxc4 bxc4 49. Bc1 Kf5 50. Ke3 g5 51. Bd2 g4 52. Be1 Ke6 53. Ke4 Kd6 54. Bg3 1-0

[Event "Ivan Parcetic Memorial-02"]
[Site "Sombor"]
[Date "1966.08.28"]
[Round "4"]
[White "Kerkhoff, Leo"]
[Black "Popov, Stevan"]
[Result "1/2-1/2"]
[ECO "C84"]
[PlyCount "56"]
[EventDate "1966.08.25"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "YUG"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. d4 exd4 7. e5 Ne4 8. Nxd4 Nxd4 9. Qxd4 Nc5 10. Nc3 0-0 11. Bg5 Bxg5 12. Qxc5 Be7 13. Qe3 d5 14. Rad1 c6 15. Bb3 Be6 16. Ne2 Qc8 17. Nd4 Bc5 18. c3 f6 19. Bc2 fxe5 20. Qxe5 Bxd4 21. Qxd4 Qc7 22. Rde1 Bf5 23. Bxf5 Rxf5 24. Re6 Raf8 25. h3 Qf4 26. Qxf4 Rxf4 27. Re7 R4f7 28. Rfe1 g6 1/2-1/2

[Event "Ivan Parcetic Memorial-02"]
[Site "Sombor"]
[Date "1966.08.27"]
[Round "3"]
[White "Kozomara, Vladimir"]
[Black "Kerkhoff, Leo"]
[Result "1/2-1/2"]
[ECO "E60"]
[PlyCount "110"]
[EventDate "1966.08.25"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "YUG"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. b4 d6 5. Bb2 0-0 6. e3 c5 7. bxc5 dxc5 8. Be2 Ne4 9. Nbd2 Qa5 10. 0-0 Nxd2 11. Nxd2 Qc7 12. Nb3 cxd4 13. exd4 Nc6 14. Qd2 Rd8 15. d5 Ne5 16. Rac1 b6 17. f4 Nd7 18. Bxg7 Kxg7 19. g4 Kg8 20. Qe3 Ba6 21. Rf2 Qd6 22. h4 e6 23. f5 exd5 24. fxg6 hxg6 25. Rcf1 Rf8 26. c5 bxc5 27. Bxa6 Qxa6 28. h5 Qe6 29. Qg5 Rae8 30. Nc1 Ne5 31. Rf4 Qe7 32. Rf6 Nd7 33. hxg6 Qe3+ 34. Qxe3 Rxe3 35. gxf7+ Kg7 36. Rd6 Rg3+ 37. Kf2 Rxg4 38. Rxd7 Rxf7+ 39. Rxf7+ Kxf7 40. Ke3+ Ke6 41. Nd3 c4 42. Nc5+ Kd6 43. Nb7+ Ke5 44. Re1 Rg7 45. Kd2+ Kd4 46. Nd6 Rg2+ 47. Re2 c3+ 48. Kd1 Rg6 49. Nf5+ Kd3 50. Re3+ Kc4 51. Rg3 Rxg3 52. Nxg3 d4 53. Ne4 a6 54. Ke2 Kb4 55. Kd3 Ka3 1/2-1/2

[Event "Ivan Parcetic Memorial-02"]
[Site "Sombor"]
[Date "1966.08.26"]
[Round "2"]
[White "Kerkhoff, Leo"]
[Black "Masic, Ljubomir"]
[Result "1/2-1/2"]
[ECO "B99"]
[PlyCount "54"]
[EventDate "1966.08.25"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "YUG"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Qc7 9. 0-0-0 Nbd7 10. g4 b5 11. Bxf6 Nxf6 12. g5 Nd7 13. f5 Nc5 14. g6 hxg6 15. fxe6 Bxe6 16. e5 Rc8 17. Nxe6 Nxe6 18. exd6 Bxd6 19. Bd3 Nf4 20. Nd5 Nxd5 21. Qxd5 Rh4 22. Rhf1 Kf8 23. Kb1 Rf4 24. Rxf4 Bxf4 25. Rf1 Rd8 26. Qf3 Be5 27. Qh3 Kg8 1/2-1/2

[Event "Ivan Parcetic Memorial-02"]
[Site "Sombor"]
[Date "1966.08.25"]
[Round "1"]
[White "Dely, Peter"]
[Black "Kerkhoff, Leo"]
[Result "0-1"]
[ECO "C72"]
[PlyCount "40"]
[EventDate "1966.08.25"]
[EventType "tourn"]
[EventRounds "13"]
[EventCountry "YUG"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. 0-0 Bg4 6. h3 h5 7. Bxc6+ bxc6 8. d4 Qf6 9. dxe5 dxe5 10. hxg4 hxg4 11. Bg5 Qe6 12. Nh2 g3 13. Ng4 Qg6 14. Qd7+ Kxd7 15. Nxe5+ Ke6 16. Nxg6 fxg6 17. Be3 Nf6 18. Nd2 Ng4 19. Nc4 Rh5 20. fxg3 Bc5 0-1

[Event "IBM-B"]
[Site "Amsterdam"]
[Date "1966.08.04"]
[Round "9"]
[White "Kerkhoff, Leo"]
[Black "Hartoch, Robert G"]
[Result "0-1"]
[ECO "C84"]
[PlyCount "98"]
[EventDate "1966.07.22"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. d4 exd4 7. e5 Ne4 8. Nxd4 Nxd4 9. Qxd4 Nc5 10. Nc3 0-0 11. Bg5 Bxg5 12. Qxc5 Be7 13. Qe3 d5 14. Rad1 c6 15. Bb3 Qa5 16. Kh1 Bc5 17. Qg5 Kh8 18. f4 f6 19. exf6 gxf6 20. Qh6 Qc7 21. f5 Qg7 22. Qh3 Bd7 23. Ne2 Rae8 24. Qh5 Re5 25. Rd3 Be8 26. Qf3 Bf7 27. c3 Rg8 28. Ng3 Qg5 29. Bd1 Rge8 30. Qg4 Re1 31. Qxg5 Rxf1+ 32. Nxf1 fxg5 33. g4 Kg7 34. Kg2 Re1 35. Ng3 Kf6 36. b4 Ba7 37. Ne2 Ke5 38. Nd4 Bxd4 39. Rxd4 Re3 40. Rd2 Rxc3 41. Re2+ Kf6 42. Bb3 Rd3 43. h3 Rd4 44. a3 Rd3 45. Rb2 Re3 46. a4 Ke5 47. b5 axb5 48. axb5 c5 49. Bd1 c4 0-1

[Event "IBM-B"]
[Site "Amsterdam"]
[Date "1966.08.02"]
[Round "8"]
[White "Konstantinopolsky, Alexander Markovich"]
[Black "Kerkhoff, Leo"]
[Result "1-0"]
[ECO "A05"]
[PlyCount "81"]
[EventDate "1966.07.22"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. 0-0 0-0 5. d3 d6 6. e4 c5 7. Nbd2 Nc6 8. a4 h6 9. c3 e5 10. Re1 Bg4 11. h3 Be6 12. Kh2 d5 13. exd5 Bxd5 14. Kg1 Qc7 15. a5 Rad8 16. Qa4 Rfe8 17. Qb5 Nb8 18. Ne4 Nfd7 19. Be3 a6 20. Qa4 c4 21. Bb6 Nxb6 22. axb6 Qxb6 23. dxc4 Bxe4 24. Rxe4 Qxb2 25. Rae1 Qxc3 26. R4e3 Qb2 27. R3e2 Qb6 28. Nxe5 Bxe5 29. Rxe5 Rxe5 30. Rxe5 Nc6 31. Bxc6 bxc6 32. c5 Qb5 33. Qa1 Qd3 34. Kg2 Rb8 35. h4 Kh7 36. Re7 Qd5+ 37. Kh2 Qf5 38. Kg2 Qd5+ 39. Kh2 Rb3 40. Re8 g5 41. Qf6 1-0

[Event "IBM-B"]
[Site "Amsterdam"]
[Date "1966.08.01"]
[Round "7"]
[White "Kerkhoff, Leo"]
[Black "Dueckstein, Andreas"]
[Result "1-0"]
[ECO "C02"]
[PlyCount "63"]
[EventDate "1966.07.22"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. a3 c4 7. Be2 Bd7 8. Nbd2 Na5 9. 0-0 Ne7 10. Rb1 Ng6 11. g3 f6 12. b4 cxb3 13. c4 fxe5 14. cxd5 exd5 15. Nxe5 Nxe5 16. dxe5 Bf5 17. Rxb3 Nxb3 18. Nxb3 a6 19. Be3 Qd8 20. Nd4 Bh3 21. Bb5+ axb5 22. Qh5+ g6 23. Qxh3 Qd7 24. e6 Qe7 25. Rc1 Bg7 26. Nf5 Qf6 27. Nd6+ Ke7 28. Rc7+ Kxd6 29. Bf4+ Qxf4 30. Rd7+ Kc6 31. gxf4 Bd4 32. Qf3 1-0

[Event "IBM-B"]
[Site "Amsterdam"]
[Date "1966.07.31"]
[Round "6"]
[White "Ostojic, Predrag"]
[Black "Kerkhoff, Leo"]
[Result "1/2-1/2"]
[ECO "C73"]
[PlyCount "136"]
[EventDate "1966.07.22"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. Bxc6+ bxc6 6. d4 f5 7. exf5 e4 8. Nfd2 Bxf5 9. 0-0 Nf6 10. f3 exf3 11. Qxf3 Bd7 12. Ne4 Be7 13. Nxf6+ Bxf6 14. Re1+ Kf7 15. Bg5 Rf8 16. Bxf6 Qxf6 17. Qxf6+ Kxf6 18. Nd2 Rae8 19. Rf1+ Kg6 20. Rxf8 Rxf8 21. Re1 Re8 22. Rxe8 Bxe8 23. Kf2 Kf5 24. Ke3 g5 25. c4 h6 26. Ne4 Bf7 27. b3 Bg6 28. Nf2 Ke6 29. b4 Bb1 30. a3 Ba2 31. Kd3 Bb1+ 32. Kc3 Kf5 33. g3 Ba2 34. Kd3 h5 35. c5 Bb3 36. Ke3 Bc2 37. Kd2 Bb1 38. Ke2 Ba2 39. Nd1 Kg4 40. Kf2 Kf5 41. Ke3 Bb3 42. Nf2 Bc2 43. Kd2 Bb3 44. Kd3 Ba4 45. Kc3 Bb5 46. Kb3 Be2 47. a4 Bf1 48. Kc3 Be2 49. Kd2 Bc4 50. Ke3 d5 51. a5 Bb5 52. Kf3 Kf6 53. Nd1 Bd3 54. Ne3 Be4+ 55. Kf2 Bd3 56. h4 Be4 57. Kg1 Bd3 58. Kg2 Be4+ 59. Kf2 Bd3 60. Ke1 Bb5 61. Kd2 Ba4 62. Ke2 Bb5+ 63. Kf3 Bd3 64. Nd1 Kf5 65. Nf2 Bf1 66. hxg5 Kxg5 67. Nd1 Bd3 68. Kg2 Kf5 1/2-1/2

[Event "IBM-B"]
[Site "Amsterdam"]
[Date "1966.07.28"]
[Round "5"]
[White "Kerkhoff, Leo"]
[Black "Mueller, Heinz"]
[Result "1-0"]
[ECO "E07"]
[PlyCount "51"]
[EventDate "1966.07.22"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. 0-0 d5 5. c4 e6 6. b3 Be7 7. Bb2 0-0 8. Ne5 Nbd7 9. d4 c6 10. Nc3 Nxe5 11. dxe5 Nd7 12. cxd5 cxd5 13. e4 d4 14. Qxd4 Bc5 15. Qa4 Nxe5 16. b4 Be7 17. Rfd1 Qb8 18. Rac1 a5 19. b5 Rd8 20. Qc2 Rc8 21. Qb3 Nc4 22. Ba1 Ba3 23. Rc2 Bc5 24. Na4 Nd6 25. Nxc5 bxc5 26. Be5 1-0

[Event "IBM-B"]
[Site "Amsterdam"]
[Date "1966.07.26"]
[Round "4"]
[White "Ghitescu, Theodor"]
[Black "Kerkhoff, Leo"]
[Result "1-0"]
[ECO "E94"]
[PlyCount "89"]
[EventDate "1966.07.22"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Nf3 c6 7. 0-0 e5 8. Rb1 Qe7 9. d5 c5 10. Bg5 h6 11. Bh4 g5 12. Bg3 Nh5 13. Nd2 Nf4 14. Bg4 Bxg4 15. Qxg4 f5 16. exf5 h5 17. Qd1 Rxf5 18. Nde4 Bf8 19. Bxf4 gxf4 20. Nb5 Qd7 21. Qd3 Qg7 22. Kh1 Nd7 23. Qh3 Qg4 24. f3 Qg6 25. Nbxd6 Bxd6 26. Nxd6 Rf6 27. Qxd7 Rxd6 28. Qxb7 Rf8 29. Qxa7 h4 30. Qxc5 Kh7 31. Rbe1 Rg8 32. Qf2 Qh5 33. Qc2+ Kh6 34. Qe4 h3 35. g4 fxg3 36. hxg3 Rg5 37. Qh4 Qxh4 38. gxh4 Rg2 39. Rxe5 Rd8 40. Rg1 Rxb2 41. Re6+ Kh7 42. h5 Rxa2 43. h6 Rb8 44. d6 Rc8 45. d7 1-0

[Event "IBM-B"]
[Site "Amsterdam"]
[Date "1966.07.24"]
[Round "3"]
[White "Bakker, Piet"]
[Black "Kerkhoff, Leo"]
[Result "1/2-1/2"]
[ECO "A68"]
[PlyCount "81"]
[EventDate "1966.07.22"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 c5 6. d5 0-0 7. Be2 e6 8. Nf3 exd5 9. cxd5 b5 10. e5 dxe5 11. fxe5 Ng4 12. Bg5 Qb6 13. 0-0 Nd7 14. Be7 Ne3 15. Qd2 Nxf1 16. Rxf1 c4+ 17. Kh1 Nxe5 18. d6 Be6 19. Ng5 Nd3 20. Bf3 Rab8 21. Nxe6 fxe6 22. Qe2 e5 23. Bxf8 Rxf8 24. Ne4 Qd4 25. b3 a5 26. bxc4 bxc4 27. Rd1 Rb8 28. Qd2 c3 29. Qg5 c2 30. Rf1 c1Q 31. Rxc1 Nxc1 32. Qxc1 Qd3 33. Ng5 h6 34. Be4 Rb1 35. Qxb1 Qxb1+ 36. Bxb1 hxg5 37. Bxg6 Bf6 38. Kg1 Kg7 39. Bf5 Bd8 40. Kf2 Kf6 41. Bg4 1/2-1/2

[Event "IBM-B"]
[Site "Amsterdam"]
[Date "1966.07.23"]
[Round "2"]
[White "Kerkhoff, Leo"]
[Black "Enevoldsen, Jens"]
[Result "1/2-1/2"]
[ECO "B15"]
[PlyCount "80"]
[EventDate "1966.07.22"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c6 2. Nc3 d5 3. d4 dxe4 4. Nxe4 Nf6 5. Ng5 h6 6. N5f3 Bf5 7. Ne5 e6 8. Ngf3 Nbd7 9. Bc4 Nxe5 10. Nxe5 Bd6 11. Qe2 a6 12. g4 Be4 13. f3 Bd5 14. Bd3 b5 15. Bf4 Qc7 16. a4 Ke7 17. 0-0 Nd7 18. Bg3 Rhc8 19. Rfe1 Nxe5 20. dxe5 Bc5+ 21. Kg2 Kf8 22. c3 Bb3 23. Qe4 Ke8 24. Bc2 Bxc2 25. Qxc2 Rd8 26. Re2 Be7 27. f4 Qd7 28. f5 Qd5+ 29. Kh3 Qd3 30. Qxd3 Rxd3 31. Kg2 b4 32. cxb4 Bxb4 33. Rc1 Kd7 34. fxe6+ fxe6 35. Rf2 Rf8 36. Rxf8 Bxf8 37. Rf1 Rd2+ 38. Rf2 Bb4 39. Rxd2+ Bxd2 40. Kf3 Kc7 1/2-1/2

[Event "IBM-B"]
[Site "Amsterdam"]
[Date "1966.07.22"]
[Round "1"]
[White "Scholl, Eddie C"]
[Black "Kerkhoff, Leo"]
[Result "1-0"]
[ECO "C72"]
[PlyCount "43"]
[EventDate "1966.07.22"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. 0-0 Bg4 6. h3 Bd7 7. d4 b5 8. Bb3 Nxd4 9. Nxd4 exd4 10. c3 dxc3 11. Nxc3 Nf6 12. f4 Bc6 13. Qe2 Be7 14. e5 dxe5 15. fxe5 Qd4+ 16. Kh2 0-0 17. exf6 Bd6+ 18. Kh1 b4 19. fxg7 Qxg7 20. Bd5 Bd7 21. Ne4 Rae8 22. Qf3 1-0

[Event "IBM-B"]
[Site "Amsterdam"]
[Date "1964.07.31"]
[Round "9"]
[White "Van der Lijn, Dik"]
[Black "Kerkhoff, Leo"]
[Result "1-0"]
[ECO "A69"]
[PlyCount "59"]
[EventDate "1964.07.21"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 c5 6. d5 e6 7. Nf3 exd5 8. cxd5 0-0 9. Be2 Re8 10. e5 dxe5 11. fxe5 Ng4 12. Bg5 Qa5 13. 0-0 Nxe5 14. Nxe5 Rxe5 15. Qd2 Na6 16. d6 Bd7 17. Bc4 Rf5 18. Rxf5 Bxf5 19. Qd5 Be6 20. Qxb7 Rb8 21. Qxa6 Bxc3 22. bxc3 Qxc3 23. Rc1 Qd4+ 24. Kh1 Rb6 25. Qa4 Rxd6 26. Qe8+ Kg7 27. Be7 Qd1+ 28. Bf1 h5 29. Qf8+ Kh7 30. Bf6 1-0

[Event "IBM-B"]
[Site "Amsterdam"]
[Date "1964.07.29"]
[Round "8"]
[White "Kerkhoff, Leo"]
[Black "Enklaar, Bert F"]
[Result "1-0"]
[ECO "B11"]
[PlyCount "109"]
[EventDate "1964.07.21"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c6 2. Nc3 d5 3. Nf3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg4 6. Bc4 e6 7. h3 Bxf3 8. Qxf3 Nf6 9. 0-0 Be7 10. c3 Nbd7 11. d4 Qc7 12. Re1 0-0 13. Nf5 Bd8 14. Bf4 Qb6 15. Nd6 Nd5 16. Bg3 a5 17. Re2 Bc7 18. Bd3 Qa7 19. Rd1 Qb8 20. Ne4 b5 21. b3 Bxg3 22. fxg3 f5 23. Ng5 Nxc3 24. Rxe6 h6 25. Rc1 Qa7 26. Rd6 Ne5 27. Qe3 Nxa2 28. Qxe5 Nxc1 29. Qe6+ Kh8 30. Rd7 Qxd7 31. Qxd7 hxg5 32. Bxf5 Rad8 33. Qe6 Rf6 34. Qe7 Rdf8 35. Bc2 Kg8 36. Qe3 Na2 37. Qxg5 Nb4 38. Bg6 Nd5 39. Qh5 Rf1+ 40. Kh2 Nf6 41. Qe2 Kh8 42. g4 Rf2 43. Qe3 a4 44. bxa4 bxa4 45. Qg3 Kg8 46. g5 Nd7 47. Qd6 Rd8 48. Qe7 Rff8 49. Qe6+ Kh8 50. Qg4 Rf1 51. Bd3 Rc1 52. Qh4+ Kg8 53. Bh7+ Kh8 54. Bb1+ Kg8 55. Ba2+ 1-0

[Event "IBM-B"]
[Site "Amsterdam"]
[Date "1964.07.28"]
[Round "7"]
[White "Crabbendam, Henrico"]
[Black "Kerkhoff, Leo"]
[Result "1-0"]
[ECO "E80"]
[PlyCount "69"]
[EventDate "1964.07.21"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 c6 6. Be3 a6 7. Bd3 e5 8. d5 cxd5 9. cxd5 Nbd7 10. Qa4 0-0 11. b4 Nh5 12. g3 f5 13. Rc1 Ndf6 14. Nge2 fxe4 15. Nxe4 Kh8 16. N2c3 Nxe4 17. Bxe4 Bh3 18. Qd1 b5 19. Rg1 a5 20. a3 axb4 21. axb4 Ra3 22. Qd2 Nf6 23. Ke2 Qa8 24. g4 h5 25. gxh5 Nxh5 26. Rxg6 Bf5 27. Rg5 Nf4+ 28. Bxf4 Bxe4 29. fxe4 Rxf4 30. Rcg1 Qf8 31. Qe3 Qc8 32. Rxg7 Qc4+ 33. Kd2 Rf2+ 34. Ke1 Ra1+ 35. Kxf2 1-0

[Event "IBM-B"]
[Site "Amsterdam"]
[Date "1964.07.27"]
[Round "6"]
[White "Kerkhoff, Leo"]
[Black "Bertok, Mario"]
[Result "1/2-1/2"]
[ECO "B27"]
[PlyCount "116"]
[EventDate "1964.07.21"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. Nc3 Qa5 5. Be3 Nf6 6. Nd2 cxd4 7. Nb3 Qc7 8. Nxd4 a6 9. Qd2 Nc6 10. f3 0-0 11. g4 e6 12. 0-0-0 b5 13. h4 h5 14. Nxc6 dxc6 15. e5 Nd5 16. Nxd5 exd5 17. Bh6 Qxe5 18. Bxg7 Kxg7 19. Re1 Qf6 20. gxh5 Bf5 21. Bd3 Bxd3 22. Qxd3 Rae8 23. Reg1 Qf4+ 24. Qd2 Qxd2+ 25. Kxd2 Kh6 26. hxg6 fxg6 27. Rg3 Rf4 28. Rhg1 Re6 29. Rh3 Rd4+ 30. Kc3 c5 31. b3 b4+ 32. Kb2 a5 33. Rg4 Rd1 34. Rhg3 Kh7 35. Rg1 Rxg1 36. Rxg1 Re5 37. a3 Kh6 38. axb4 axb4 39. Kc1 Rf5 40. Rg3 Rf4 41. Rg5 Rf5 42. Rg3 Kh5 43. Kd2 Kxh4 44. Rxg6 Rxf3 45. Rg8 Rc3 46. Rg7 d4 47. Rg1 Kh5 48. Rg8 d3 49. cxd3 Rxb3 50. Rc8 Rc3 51. Rg8 Ra3 52. Rc8 Ra2+ 53. Kc1 Ra5 54. Rg8 Ra3 55. Kc2 Ra2+ 56. Kb1 Rf2 57. Kc1 Rf5 58. Kc2 Rg5 1/2-1/2

[Event "IBM-B"]
[Site "Amsterdam"]
[Date "1964.07.25"]
[Round "5"]
[White "Krabbe, Tim"]
[Black "Kerkhoff, Leo"]
[Result "0-1"]
[ECO "C44"]
[PlyCount "88"]
[EventDate "1964.07.21"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. c3 Nf6 4. d4 Nxe4 5. d5 Ne7 6. Nxe5 Ng6 7. Nxg6 hxg6 8. Bd3 Nf6 9. Qf3 c6 10. 0-0 Nxd5 11. Re1+ Be7 12. Bg5 0-0 13. Bxe7 Nxe7 14. Nd2 d5 15. g4 c5 16. Qg3 Nc6 17. b3 Qg5 18. Nf3 Qxg4 19. Ne5 Qxg3+ 20. hxg3 Nxe5 21. Rxe5 Rd8 22. Rae1 Kf8 23. c4 Be6 24. cxd5 Bxd5 25. Rc1 b6 26. Be4 Bxe4 27. Rxe4 Re8 28. Rec4 Re2 29. a3 Rae8 30. Kg2 R8e4 31. b4 Rxc4 32. Rxc4 Re5 33. Kf3 Ke7 34. bxc5 Rxc5 35. Re4+ Kd6 36. Re3 Rc2 37. Rb3 f5 38. Ke3 g5 39. Kf3 Kc5 40. Ke3 b5 41. Rd3 a5 42. Rd7 Rc3+ 43. Kd2 Rxa3 44. Rxg7 g4 0-1

[Event "IBM-B"]
[Site "Amsterdam"]
[Date "1964.07.24"]
[Round "4"]
[White "Kerkhoff, Leo"]
[Black "Kieninger, Georg"]
[Result "1/2-1/2"]
[ECO "C02"]
[PlyCount "56"]
[EventDate "1964.07.21"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 b6 4. c3 Qd7 5. Bd3 Ba6 6. Bc2 c5 7. Ne2 Nc6 8. a3 h5 9. Be3 g6 10. Nd2 Nh6 11. b4 Ng4 12. Qb1 Ne7 13. a4 Bh6 14. Bxh6 Nxh6 15. b5 Bb7 16. Nf3 c4 17. Nf4 a5 18. Ng5 0-0-0 19. h4 Rdf8 20. Qd1 Kb8 21. Qe2 Bc8 22. 0-0-0 Nef5 23. g3 Qe7 24. Kb2 Bd7 25. Rh3 Ng7 26. f3 Nhf5 27. Qf2 Rh6 28. Re1 Rfh8 1/2-1/2

[Event "IBM-B"]
[Site "Amsterdam"]
[Date "1964.07.23"]
[Round "3"]
[White "Kerkhoff, Leo"]
[Black "De Rooi, Paul"]
[Result "1-0"]
[ECO "C42"]
[PlyCount "47"]
[EventDate "1964.07.21"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nc3 Bb4 4. Nxe5 Qe7 5. Nf3 Nc6 6. Be2 Bxc3 7. dxc3 Nxe4 8. 0-0 d6 9. Re1 Be6 10. Bb5 d5 11. c4 0-0-0 12. Qe2 Nf6 13. Bxc6 bxc6 14. cxd5 Rxd5 15. Qa6+ Kd7 16. c4 Rd6 17. Bf4 Rc8 18. Bxd6 cxd6 19. Qxa7+ Rc7 20. Qd4 c5 21. Qd3 h6 22. Rad1 Rb7 23. Qa3 Ke8 24. Qa8+ 1-0

[Event "IBM-B"]
[Site "Amsterdam"]
[Date "1964.07.22"]
[Round "2"]
[White "Karaklajic, Nikola"]
[Black "Kerkhoff, Leo"]
[Result "1-0"]
[ECO "C56"]
[PlyCount "51"]
[EventDate "1964.07.21"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. 0-0 Nxe4 6. Re1 d5 7. Bxd5 Qxd5 8. Nc3 Qa5 9. Nxe4 Be6 10. Bd2 Qf5 11. Bg5 h6 12. Bh4 Bc5 13. b4 Bb6 14. a4 a6 15. b5 axb5 16. axb5 Rxa1 17. Qxa1 Na5 18. Nxd4 Bxd4 19. Qxd4 0-0 20. Bf6 Qg6 21. Re3 Re8 22. Bxg7 Qxg7 23. Rg3 Bg4 24. Rxg4 Qxg4 25. Nf6+ Kf8 26. Nh7+ 1-0

[Event "IBM-B"]
[Site "Amsterdam"]
[Date "1964.07.21"]
[Round "1"]
[White "Kerkhoff, Leo"]
[Black "Wade, Robert Graham"]
[Result "1/2-1/2"]
[ECO "B03"]
[PlyCount "100"]
[EventDate "1964.07.21"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. d4 d6 5. exd6 cxd6 6. Bd3 g6 7. Ne2 Bg7 8. Be3 0-0 9. Nbc3 Nc6 10. b3 e5 11. d5 Ne7 12. 0-0 Nf5 13. Bc1 a5 14. Ba3 Re8 15. Rc1 Bf8 16. Nb5 a4 17. Nec3 axb3 18. Qxb3 Bd7 19. Bb4 Bxb5 20. Nxb5 Nd4 21. Nxd4 exd4 22. Rfe1 Rxe1+ 23. Rxe1 Na4 24. g3 b6 25. Qd1 Bg7 26. Qe2 Bf6 27. Bc2 Nc3 28. Bxc3 dxc3 29. Bb3 Kg7 30. Qe3 h5 31. Kg2 Qc7 32. f4 Ra7 33. Re2 Qd8 34. Qd3 Re7 35. Kf3 Rxe2 36. Qxe2 Qd7 37. Qe3 b5 38. c5 dxc5 39. Qxc5 Qg4+ 40. Kf2 Qh3 41. Kg1 Qf5 42. Qf2 Qd3 43. Kg2 Bd4 44. Qc2 Qe3 45. d6 Qg1+ 46. Kh3 Qf1+ 47. Qg2 Qxg2+ 48. Kxg2 Kf8 49. Kf3 Bc5 50. d7 Bb6 1/2-1/2

[Event "NED U20-ch"]
[Site "Rotterdam"]
[Date "1964.??.??"]
[Round "?"]
[White "Kerkhoff, Leo"]
[Black "Ree, Hans"]
[Result "1-0"]
[ECO "C01"]
[PlyCount "81"]
[EventDate "1964.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 d5 4. exd5 exd5 5. Bb5+ Nc6 6. Qe2+ Be6 7. 0-0 Nf6 8. Ne5 Qb6 9. Re1 0-0-0 10. Bxc6 bxc6 11. c3 Bd6 12. dxc5 Bxc5 13. b4 Bd6 14. Be3 Qb7 15. Bd4 Rhe8 16. Nd2 Bf5 17. Qf3 Be4 18. Nxe4 dxe4 19. Qf5+ Kb8 20. Nc4 Bc7 21. Na5 Bxa5 22. bxa5 Rd5 23. Qf4+ Kc8 24. a6 Qxa6 25. Rab1 Rb5 26. c4 Rb7 27. Bxf6 gxf6 28. Qf5+ Kb8 29. Qd7 Rc8 30. Qxf7 Rb6 31. Qxh7 Qxc4 32. Qxe4 Qxa2 33. Qf4+ Kb7 34. Rxb6+ axb6 35. Re7+ Ka6 36. h4 c5 37. Qf5 Rd8 38. Qxf6 c4 39. Re1 Qd2 40. Ra1+ Kb7 41. Qf7+ 1-0

