[Event "Helmond op"]
[Site "Helmond"]
[Date "2001.06.??"]
[Round "6"]
[White "Berkvens, Joost"]
[Black "Van de Kerkhof, Gerard"]
[Result "1-0"]
[ECO "A57"]
[WhiteElo "2383"]
[PlyCount "31"]
[EventDate "2001.06.??"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. Nc3 axb5 6. e4 b4 7. Nb5 d6 8. Bf4 g5 9. Bxg5 Nxe4 10. Bf4 Qa5 11. Bc4 b3+ 12. Kf1 Ba6 13. axb3 Qb6 14. Qe2 Kd8 15. Qxe4 Qxb5 16. Rxa6 1-0

[Event "Dieren op"]
[Site "Dieren"]
[Date "1991.??.??"]
[Round "1"]
[White "Van de Kerkhof, Gerard"]
[Black "Comp Mephisto Polgar"]
[Result "1-0"]
[ECO "B10"]
[PlyCount "59"]
[EventDate "1991.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 1997"]
[Source "ChessBase"]
[SourceDate "1996.11.15"]
[SourceVersion "1"]
[SourceVersionDate "1996.11.15"]
[SourceQuality "1"]

1. e4 c6 2. f4 d5 3. e5 Bf5 4. Nf3 Nd7 5. Nd4 Nh6 6. Nxf5 Nxf5 7. Bd3 e6 8. Bxf5 exf5 9. Qe2 Bc5 10. c3 d4 11. Qd3 dxc3 12. bxc3 g6 13. Qe2 Qa5 14. Bb2 Nb6 15. Rf1 Na4 16. Bc1 0-0 17. Rf3 Rfd8 18. Rg3 Rac8 19. h4 Be7 20. Rh3 Nb6 21. h5 Na4 22. hxg6 hxg6 23. Na3 b5 24. g4 fxg4 25. Qxg4 Nb6 26. f5 Bxa3 27. Qh4 Kf8 28. Bxa3+ Qxa3 29. Qf6 Ke8 30. e6 1-0

[Event "Dieren op"]
[Site "Dieren"]
[Date "1991.??.??"]
[Round "2"]
[White "Van der Werf, Mark"]
[Black "Van de Kerkhof, Gerard"]
[Result "1-0"]
[ECO "C45"]
[WhiteElo "2370"]
[PlyCount "49"]
[EventDate "1991.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[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. d4 exd4 4. Nxd4 Nxd4 5. Qxd4 Qf6 6. Qc4 c6 7. Be2 Ne7 8. Nc3 d6 9. 0-0 h5 10. Be3 Qg6 11. Kh1 h4 12. Rad1 h3 13. g3 Bd7 14. Rd2 d5 15. Qb3 b6 16. exd5 c5 17. Bb5 Nf5 18. Re2 0-0-0 19. Qa4 Bxb5 20. Nxb5 a5 21. Bf4 Kb7 22. Qe4 Rh4 23. d6+ Ka6 24. Nc7+ Ka7 25. gxh4 1-0

