[Event "NED-ch M corr"]
[Site "Netherlands"]
[Date "1996.??.??"]
[Round "?"]
[White "Van Melis, ALM"]
[Black "Groen, P."]
[Result "1-0"]
[ECO "B16"]
[PlyCount "57"]
[EventDate "1996.??.??"]
[EventType "swiss (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr 2000"]
[Source "ChessBase"]
[SourceDate "2000.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nf6 5. Nxf6+ gxf6 6. Nf3 Bg4 7. Be2 Qc7 8. h3 Bh5 9. 0-0 Nd7 10. Re1 e6 11. c4 0-0-0 12. Bd2 Rg8 13. b4 f5 14. Ng5 Bg6 15. Qc1 Nf6 16. a3 Rd7 17. c5 Nd5 18. b5 Be7 19. bxc6 Qxc6 20. a4 Rdd8 21. Nf3 Qc7 22. a5 a6 23. c6 f4 24. Ne5 Be4 25. Bf1 Bf5 26. Nxf7 Rdf8 27. Nh6 Rg6 28. Nxf5 Rxf5 29. cxb7+ 1-0

[Event "NED-ch M corr"]
[Site "Netherlands"]
[Date "1994.??.??"]
[Round "?"]
[White "Groen, P."]
[Black "Mostertman, Loek G"]
[Result "1/2-1/2"]
[ECO "A42"]
[PlyCount "79"]
[EventDate "1994.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. c4 g6 2. d4 Bg7 3. Nc3 d6 4. e4 e5 5. Nge2 Nc6 6. Be3 Nh6 7. d5 Ne7 8. f3 f5 9. Bf2 Nf7 10. Nc1 0-0 11. Be2 c5 12. 0-0 f4 13. Nd3 g5 14. b4 cxb4 15. Nxb4 h5 16. Rb1 Kh7 17. Nd3 b6 18. Rb3 Rg8 19. Nb5 Bd7 20. Kh1 Bf6 21. Qb1 Kh6 22. Nxa7 Rxa7 23. Bxb6 Qa8 24. Bxa7 Qxa7 25. c5 Bc8 26. Rb6 Ng6 27. Rc1 Bd8 28. Rb2 g4 29. cxd6 Nxd6 30. Rc6 Qe7 31. Qc1 Bd7 32. Ra6 Bb5 33. Rxd6 Bxd3 34. Rxd8 Qxd8 35. Bxd3 gxf3 36. gxf3 Nh4 37. Qf1 Qg5 38. Rf2 Qg7 39. Bc2 Qa7 40. Bd1 1/2-1/2

[Event "NED-ch M corr"]
[Site "Netherlands"]
[Date "1993.??.??"]
[Round "?"]
[White "Groen, P."]
[Black "Schot, JC."]
[Result "1/2-1/2"]
[ECO "A24"]
[PlyCount "63"]
[EventDate "1993.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 0-0 5. d3 d6 6. e4 e5 7. Nge2 c6 8. 0-0 a6 9. h3 b5 10. Qe1 Be6 11. b3 Qd7 12. Kh2 d5 13. exd5 cxd5 14. Bb2 Ra7 15. cxb5 axb5 16. d4 exd4 17. Nxd4 Ng4+ 18. hxg4 Bxd4 19. Qd2 Bg7 20. Nxd5 Bxd5 21. Bxg7 Kxg7 22. Rfd1 Qxg4 23. Qxd5 Rd7 24. Qe5+ f6 25. Rxd7+ Nxd7 26. Qxb5 Qd4 27. Rf1 Ne5 28. a4 Rd8 29. Kg1 h5 30. Qb7+ Rd7 31. Qe4 Qc3 32. Rb1 1/2-1/2

[Event "NED-Cup corr"]
[Site "Netherlands"]
[Date "1993.??.??"]
[Round "?"]
[White "Groen, P."]
[Black "Van Aalzum, JA."]
[Result "1-0"]
[ECO "A22"]
[PlyCount "69"]
[EventDate "1993.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. g3 Bb4 4. Bg2 0-0 5. e4 Bxc3 6. bxc3 c6 7. Qb3 Na6 8. Ba3 d6 9. Ne2 Re8 10. 0-0 Rb8 11. Rfe1 b5 12. d4 Bg4 13. h3 Bxe2 14. Rxe2 b4 15. cxb4 Nxb4 16. dxe5 dxe5 17. Rd1 Qc8 18. Qc3 c5 19. Kh2 Nd7 20. Red2 Nf8 21. f4 f6 22. f5 a5 23. Qe3 h6 24. Qf2 Qc7 25. Bc1 Na6 26. Rd5 Red8 27. Be3 Rxd5 28. cxd5 Qd6 29. Bf1 Nd7 30. Rc1 a4 31. Rc3 Rb4 32. Bc4 a3 33. Bc1 Nb6 34. Qe2 Nxc4 35. Rxc4 1-0

[Event "NED-ch M corr"]
[Site "Netherlands"]
[Date "1993.??.??"]
[Round "?"]
[White "Nieland, CLT"]
[Black "Groen, P."]
[Result "1/2-1/2"]
[ECO "E83"]
[PlyCount "58"]
[EventDate "1993.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Be3 Nc6 7. Nge2 a6 8. Qd2 Re8 9. h4 h5 10. Nc1 e5 11. d5 Nd4 12. Nb3 Nxb3 13. axb3 c5 14. dxc6 bxc6 15. 0-0-0 d5 16. cxd5 cxd5 17. Nxd5 Nxd5 18. Qxd5 Qc7+ 19. Qc5 Qb7 20. Bc4 Be6 21. Bxe6 Rxe6 22. Qd5 Rc8+ 23. Kb1 Qb8 24. Rd3 Bf8 25. Rc1 Rd6 26. Rxc8 Qxc8 27. Rc3 Qd8 28. Qc4 Qxh4 29. Rc1 Qd8 1/2-1/2

[Event "NED-Cup corr"]
[Site "Netherlands"]
[Date "1993.??.??"]
[Round "?"]
[White "Van Gerwen, Geert"]
[Black "Groen, P."]
[Result "1-0"]
[ECO "B13"]
[PlyCount "65"]
[EventDate "1993.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 Nc6 6. Bg5 Be6 7. Nge2 dxc4 8. Nf4 Nxd4 9. Nxe6 Nxe6 10. Bxc4 Nxg5 11. Qa4+ Nd7 12. 0-0-0 a6 13. Rxd7 Qxd7 14. Bb5 axb5 15. Qxa8+ Qd8 16. Qxb7 e5 17. Qxb5+ Qd7 18. Qxe5+ Ne6 19. Rd1 Qb7 20. f4 Be7 21. f5 0-0 22. fxe6 Qxg2 23. exf7+ Rxf7 24. Ne4 Qg4 25. Qd5 Qf4+ 26. Kb1 h6 27. a4 Qf5 28. a5 Bb4 29. a6 Qxd5 30. Rxd5 Ra7 31. Rb5 Be1 32. Rb6 Ba5 33. Rc6 1-0

[Event "NED-ch M corr"]
[Site "Netherlands"]
[Date "1993.??.??"]
[Round "?"]
[White "Voets, Frans"]
[Black "Groen, P."]
[Result "1/2-1/2"]
[ECO "E62"]
[PlyCount "70"]
[EventDate "1993.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. g3 d6 5. Nf3 0-0 6. Bg2 c6 7. 0-0 Qa5 8. h3 Na6 9. Bd2 Qc7 10. Bg5 h6 11. Bf4 Nh5 12. Bc1 e5 13. g4 Nf4 14. Bxf4 exf4 15. Qd2 g5 16. e3 f5 17. gxf5 fxe3 18. fxe3 Bxf5 19. Rae1 Qd7 20. Kh2 Rae8 21. Ne2 Nc7 22. Ng3 Be6 23. b3 Re7 24. Nh5 Qe8 25. Nxg7 Rxg7 26. Qb4 g4 27. hxg4 Rxg4 28. Re2 Bf5 29. Rff2 Be4 30. Ne1 Rxf2 31. Rxf2 c5 32. dxc5 Qe5+ 33. Kg1 dxc5 34. Qd2 Bxg2 35. Nxg2 Qa1+ 1/2-1/2

[Event "NED-ch M corr"]
[Site "Netherlands"]
[Date "1992.??.??"]
[Round "?"]
[White "Groen, P."]
[Black "Oomen"]
[Result "0-1"]
[ECO "A22"]
[PlyCount "114"]
[EventDate "1992.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 e5 3. g3 Bb4 4. Bg2 0-0 5. e4 Bxc3 6. bxc3 c6 7. Qb3 Na6 8. Ba3 d6 9. Ne2 Nd7 10. d4 c5 11. 0-0 Nb6 12. Bc1 cxd4 13. cxd4 Be6 14. d5 Nc5 15. Qc2 Bd7 16. Be3 Rc8 17. Rac1 f5 18. f3 Qe7 19. Rf2 fxe4 20. fxe4 Rxf2 21. Bxf2 Qg5 22. h3 Nca4 23. Qb3 Qd2 24. Bf1 Nc5 25. Qb1 Qh6 26. g4 Qg5 27. Ng3 Rf8 28. Re1 Rf3 29. Qc1 Qxc1 30. Rxc1 Ra3 31. Rc2 Nba4 32. Be1 g6 33. Kf2 Nd3+ 34. Bxd3 Rxd3 35. Bd2 Kf7 36. Kg2 Nc5 37. Bh6 Ke8 38. Rf2 Rxg3+ 39. Kxg3 Nxe4+ 40. Kg2 Nxf2 41. Kxf2 b5 42. Be3 bxc4 43. Bxa7 Bb5 44. a3 c3 45. Kf3 Bc4 46. Ke4 Bf1 47. h4 Bg2+ 48. Kd3 Bxd5 49. Kxc3 Kd7 50. Kd3 Ke6 51. g5 Bc6 52. Bf2 Kf5 53. Ke3 Kg4 54. Be1 d5 55. Ke2 Bb5+ 56. Ke3 Kf5 57. Bf2 d4+ 0-1

[Event "NED-ch M corr"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Groen, P."]
[Black "De Coninck, Georges"]
[Result "1-0"]
[ECO "A18"]
[PlyCount "71"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. cxd5 exd5 5. e5 Ne4 6. Nf3 Nc6 7. Bb5 Bc5 8. 0-0 0-0 9. Qa4 Nxc3 10. dxc3 Bd7 11. Bg5 Be7 12. Bxe7 Qxe7 13. Rfe1 Qe6 14. Rad1 a6 15. Bxc6 bxc6 16. Qa5 Rfb8 17. b4 Rb6 18. Nd4 Qg6 19. Re3 Bf5 20. Qc5 Re8 21. Rde1 Be4 22. f3 Bf5 23. e6 fxe6 24. Nxc6 Qg5 25. Nd4 Rc8 26. Re5 Qd2 27. Nxf5 exf5 28. R5e3 Qd3 29. Re8+ Rxe8 30. Rxe8+ Kf7 31. Re7+ Kf6 32. Qxc7 Re6 33. Rf7+ Kg5 34. Rxg7+ Kf6 35. Qf7+ Ke5 36. f4+ 1-0

[Event "NED jub25 q corr9193"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Groen, P."]
[Black "De Glopper, Jaap BH"]
[Result "1-0"]
[ECO "A34"]
[PlyCount "85"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 c5 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nc7 6. d3 e5 7. Nf3 Nc6 8. Nd2 Bd7 9. Nc4 b5 10. Ne3 Rc8 11. 0-0 Nd4 12. Bd2 Be6 13. f4 exf4 14. gxf4 g6 15. Rc1 f5 16. Rf2 Qd6 17. Nf1 Bd7 18. e3 Nde6 19. e4 Nd4 20. Ne3 Bg7 21. e5 Qa6 22. b4 Nce6 23. Ncd5 Kf7 24. Bc3 cxb4 25. Bxd4 Nxd4 26. Rb1 Rc5 27. Nc2 Nxc2 28. Rxc2 Rxc2 29. Qxc2 Rc8 30. Qd2 g5 31. d4 gxf4 32. Qxb4 Bf8 33. Qb3 Be6 34. Qd1 Kg7 35. Nxf4 Bf7 36. Qd3 Rc4 37. Rd1 Qc8 38. e6 Bxe6 39. Qe3 Bf7 40. Bd5 Bxd5 41. Qe5+ Kf7 42. Qxd5+ Ke8 43. Re1+ 1-0

[Event "NED jub25 q corr9193"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Groen, P."]
[Black "Elburg, John"]
[Result "1-0"]
[ECO "A22"]
[PlyCount "53"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. g3 Bb4 4. Bg2 0-0 5. e4 Bxc3 6. bxc3 c6 7. Qb3 Na6 8. Ba3 d6 9. Ne2 Re8 10. 0-0 Rb8 11. Rfe1 b5 12. d4 Bg4 13. h3 Bxe2 14. Rxe2 b4 15. cxb4 Nxb4 16. dxe5 dxe5 17. Rd1 Qb6 18. Rd6 Qc5 19. Red2 a5 20. Rd1 Nfd5 21. Rxc6 Qxc6 22. exd5 Qc5 23. d6 Red8 24. Rd5 Qa7 25. Bxb4 Rxb4 26. Qc2 Qa6 27. c5 1-0

[Event "NED-ch M corr"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Groen, P."]
[Black "Hubers, Paul"]
[Result "1/2-1/2"]
[ECO "A34"]
[PlyCount "90"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 c5 5. Bg2 Nc7 6. d3 e5 7. Nf3 Nc6 8. Nd2 Bd7 9. Nc4 b5 10. Ne3 Rc8 11. 0-0 Be7 12. f4 f6 13. Ned5 Nxd5 14. Nxd5 0-0 15. fxe5 Nxe5 16. Bf4 Nc6 17. Rc1 Be6 18. e4 Bd6 19. Be3 Nd4 20. b4 Bxd5 21. exd5 Re8 22. Be4 Qe7 23. Re1 Qf8 24. Bxd4 cxd4 25. Rxc8 Rxc8 26. Qh5 g6 27. Bxg6 hxg6 28. Qxg6+ Qg7 29. Qf5 Rd8 30. Re4 Kf8 31. Qh3 Qc7 32. Qh6+ Qg7 33. Qh4 Bxb4 34. Qh3 Qg8 35. Re6 Kf7 36. Ra6 Be7 37. Qf5 Ke8 38. d6 Rxd6 39. Qxb5+ Kf8 40. Rxa7 Qe6 41. Qh5 Qe3+ 42. Kg2 Qd2+ 43. Kh3 Qxd3 44. Qh8+ Kf7 45. Qh5+ Ke6 1/2-1/2

[Event "NED-ch M corr"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Groen, P."]
[Black "Mostertman, Loek G"]
[Result "1-0"]
[ECO "A37"]
[PlyCount "69"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. c4 g6 2. Nc3 Bg7 3. g3 c5 4. Bg2 Nc6 5. Nf3 d6 6. 0-0 h5 7. d3 Nh6 8. Rb1 Bg4 9. Bg5 Qd7 10. Nd5 f6 11. Bd2 Kf7 12. b4 h4 13. bxc5 dxc5 14. Be3 b6 15. Nxh4 g5 16. Nf3 Nf5 17. Qd2 Rh5 18. Nxb6 axb6 19. Rxb6 Rc8 20. Rfb1 Ncd4 21. Rb7 Qd8 22. Bxd4 cxd4 23. Qb2 Kg6 24. Ra7 Qh8 25. Qb7 Nd6 26. Qxe7 Bf8 27. Ne5+ fxe5 28. Be4+ Nxe4 29. Rb6+ Nf6 30. Qf7+ Kf5 31. Qe6+ Kg6 32. Qf7+ Kf5 33. f3 Bxf3 34. exf3 Bd6 35. Rxd6 1-0

[Event "NED jub25 q corr9193"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Groen, P."]
[Black "Van den Langenberg, Christ W"]
[Result "0-1"]
[ECO "A34"]
[PlyCount "58"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. c4 e6 2. e4 c5 3. Nc3 Nc6 4. Nf3 Nf6 5. d3 d5 6. e5 d4 7. exf6 dxc3 8. bxc3 Qxf6 9. Qd2 Be7 10. Be2 0-0 11. 0-0 e5 12. Qe3 Re8 13. Rd1 Bg4 14. Rb1 b6 15. h3 Bh5 16. Nh2 Bxe2 17. Qxe2 Rad8 18. Ng4 Qg6 19. f3 Bh4 20. Be3 f5 21. Bf2 Bg5 22. Ne3 Nd4 23. Qf1 Nxf3+ 24. Kh1 Bxe3 25. Bxe3 Ng5 26. Rb2 Nf7 27. a4 Nd6 28. a5 f4 29. Bf2 Nf5 0-1

[Event "NED-ch M corr"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Hotting, Arend"]
[Black "Groen, P."]
[Result "0-1"]
[ECO "B16"]
[PlyCount "38"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ gxf6 6. c3 Bf5 7. Ne2 Nd7 8. Ng3 Bg6 9. h4 h5 10. Be2 Qa5 11. f4 e6 12. 0-0 f5 13. Bxh5 Bxh5 14. Nxf5 Be7 15. g3 0-0-0 16. b4 Qd5 17. c4 Qxc4 18. Bb2 Qd5 19. b5 Rdg8 0-1

[Event "NED jub25 q corr9193"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Mulder van Leens Dijkstra, Kornelis Dirk"]
[Black "Groen, P."]
[Result "0-1"]
[ECO "E83"]
[PlyCount "60"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Be3 Nc6 7. Nge2 a6 8. a3 Bd7 9. b4 e5 10. d5 Ne7 11. Nc1 Ne8 12. Bd3 f5 13. 0-0 f4 14. Bf2 g5 15. g4 h5 16. h3 Nf6 17. Nb3 Ng6 18. c5 hxg4 19. hxg4 Rf7 20. Kg2 Nxg4 21. fxg4 f3+ 22. Kg3 Rf4 23. Be3 Nh4 24. Bxf4 exf4+ 25. Kf2 Bxc3 26. Rc1 Qf6 27. Bb1 Bb5 28. cxd6 cxd6 29. Re1 Re8 30. Bd3 Bxe1+ 0-1

[Event "NED-ch M corr"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Speets, NA."]
[Black "Groen, P."]
[Result "0-1"]
[ECO "B12"]
[PlyCount "80"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. Bd3 Bxd3 5. Qxd3 e6 6. Nf3 Qa5+ 7. c3 Qa6 8. Qd1 c5 9. Be3 Nd7 10. Nbd2 Ne7 11. a3 Nc6 12. b4 cxd4 13. cxd4 Rc8 14. Nb3 b6 15. Qe2 Qc4 16. Nfd2 Qxe2+ 17. Kxe2 b5 18. Rhc1 Nb6 19. Rc2 Nc4 20. Nc5 Bxc5 21. bxc5 N6a5 22. Nxc4 bxc4 23. Rb2 Nb3 24. Rf1 Kd7 25. f4 g6 26. g4 h5 27. g5 Rc6 28. Rfb1 Rb8 29. Kd1 Rb5 30. Kc2 Ra6 31. Rxb3 cxb3+ 32. Rxb3 Rba5 33. Bc1 Kc6 34. Bb2 Ra4 35. Rb8 Rc4+ 36. Kb3 Ra5 37. Rc8+ Kb7 38. Rf8 Rb5+ 39. Ka2 Rc2 40. Rxf7+ Kc6 0-1

[Event "NED-ch M corr"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Vaassen, Jack M"]
[Black "Groen, P."]
[Result "1/2-1/2"]
[ECO "A45"]
[PlyCount "54"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 Nf6 2. Bg5 Ne4 3. Bf4 d5 4. Nd2 Nxd2 5. Qxd2 Bf5 6. Nf3 e6 7. e3 Be7 8. c4 0-0 9. Rc1 c6 10. Be2 Nd7 11. 0-0 Nf6 12. h3 Rc8 13. Ne5 Ne4 14. Qd1 f6 15. Nf3 g5 16. Bh2 Bd6 17. Bxd6 Qxd6 18. Nd2 Qe7 19. Nxe4 Bxe4 20. Qd2 b6 21. cxd5 Bxd5 22. b4 h6 23. Qb2 Rc7 24. Rc3 e5 25. dxe5 Qxe5 26. Rfc1 Rff7 27. R3c2 Rfe7 1/2-1/2

[Event "NED jub25 q corr9193"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Van der Klashorst, F."]
[Black "Groen, P."]
[Result "1/2-1/2"]
[ECO "B12"]
[PlyCount "125"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. Be2 e6 5. Nf3 c5 6. 0-0 Ne7 7. c3 Nec6 8. Na3 c4 9. Nc2 Nd7 10. Ne3 Bg6 11. Ne1 f5 12. f4 Bf7 13. g4 g6 14. Nf3 h6 15. Re1 fxg4 16. Nxg4 Bg7 17. Be3 Ne7 18. b3 b5 19. a4 a6 20. Bf2 Nf5 21. Qd2 0-0 22. Ra3 Nb6 23. Rea1 Be8 24. axb5 Bxb5 25. b4 Nd7 26. Kh1 Rf7 27. Rg1 Nf8 28. Qe1 Raa7 29. Ra2 Qc7 30. Bd1 Be8 31. Bc2 a5 32. bxa5 Rxa5 33. Rxa5 Qxa5 34. Nf6+ Bxf6 35. Bxf5 Bg7 36. Bxg6 Nxg6 37. Rxg6 Rxf4 38. Rg3 Bh5 39. Qe3 Re4 40. Qd2 Rg4 41. Rxg4 Bxg4 42. Nh4 Qd8 43. Kg2 Bh5 44. Kg3 Qb8 45. Be3 Qb1 46. h3 Kh7 47. Ng2 Bg6 48. Nf4 Qf5 49. Qe2 Qf7 50. Qg4 Bf5 51. Qh4 Qa7 52. Nh5 Bxe5+ 53. Bf4 Bxf4+ 54. Kxf4 Qf7 55. Ke3 Kg6 56. Nf4+ Kg7 57. Nh5+ Kh7 58. Nf6+ Kg6 59. Nh5 Qf8 60. Nf4+ Kf7 61. Ne2 Qg7 62. Qf4 Kg8 63. h4 1/2-1/2

[Event "NED-ch M corr"]
[Site "Netherlands"]
[Date "1990.??.??"]
[Round "?"]
[White "Du Pree, Johan"]
[Black "Groen, P."]
[Result "0-1"]
[ECO "B16"]
[PlyCount "127"]
[EventDate "1990.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nf6 5. Nxf6+ gxf6 6. c3 h5 7. Bc4 Qc7 8. Ne2 Bg4 9. h3 Bf5 10. Nf4 h4 11. Qe2 Nd7 12. d5 Ne5 13. dxc6 bxc6 14. Be3 Bh6 15. Rd1 Bg5 16. 0-0 Kf8 17. Rd4 Kg7 18. Rfd1 Rh6 19. Bd3 Qc8 20. Nh5+ Kg6 21. Bxg5 Rxh5 22. Bxf5+ Qxf5 23. Bxh4 Rg8 24. Bg3 Kh7 25. Qe4 Qg6 26. Bxe5 Rxe5 27. Qxg6+ Rxg6 28. Ra4 a5 29. b4 axb4 30. cxb4 Re4 31. Ra7 f5 32. Rb7 Rge6 33. a4 c5 34. bxc5 Rxa4 35. Rc1 Raa6 36. c6 Raxc6 37. Rxc6 Rxc6 38. Rd7 Kg6 39. Kh2 Rc8 40. Kg3 Ra8 41. Kf3 Rh8 42. Rc7 Rh4 43. Kg3 Rh8 44. Rc4 Ra8 45. h4 Rh8 46. Kf3 Ra8 47. g3 Ra2 48. Ke3 f6 49. f3 Ra5 50. Kf4 Rb5 51. g4 fxg4 52. fxg4 Rb1 53. h5+ Kf7 54. Rc7 Ke6 55. h6 Rf1+ 56. Kg3 Rh1 57. h7 Kd6 58. Rb7 Ke6 59. Ra7 Kd6 60. Kf4 Ke6 61. Ra6+ Kf7 62. h8Q Rxh8 63. Kf5 Re8 64. Rxf6+ 0-1

[Event "NED-ch M corr"]
[Site "Netherlands"]
[Date "1990.??.??"]
[Round "?"]
[White "Groen, P."]
[Black "Den Herder, DW."]
[Result "1-0"]
[ECO "A26"]
[PlyCount "27"]
[EventDate "1990.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. c4 e5 2. g3 Nc6 3. Bg2 g6 4. Nc3 Bg7 5. e4 Nge7 6. d3 d6 7. Nge2 0-0 8. 0-0 f5 9. Nd5 h6 10. Rb1 Kh7 11. b4 Be6 12. b5 Nb8 13. Nxe7 Qxe7 14. exf5 1-0

[Event "NED-ch M corr"]
[Site "Netherlands"]
[Date "1990.??.??"]
[Round "?"]
[White "Groen, P."]
[Black "Poel, Evert W"]
[Result "1/2-1/2"]
[ECO "A29"]
[PlyCount "141"]
[EventDate "1990.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. c4 Nf6 2. g3 e5 3. Bg2 d5 4. cxd5 Nxd5 5. Nc3 Be6 6. Nf3 Nc6 7. 0-0 Nb6 8. d4 exd4 9. Nb5 Bc5 10. Bg5 f6 11. b4 a6 12. Nxc7+ Qxc7 13. bxc5 Nc4 14. Bf4 Qd7 15. Rb1 0-0 16. Rxb7 Qxb7 17. Nxd4 Bd7 18. Bd5+ Kh8 19. Nxc6 Bxc6 20. Bxc4 Rfe8 21. Bd6 Qc8 22. Qd2 Qb7 23. f3 f5 24. Rc1 Bb5 25. Qd5 Qc8 26. Rc2 Bxc4 27. Qxc4 Qe6 28. Qd3 a5 29. Kf2 Rad8 30. Qd2 a4 31. Qb4 Qf6 32. Qxa4 Qa1 33. Rd2 Ra8 34. Qc4 Qh1 35. g4 fxg4 36. Qxg4 Qc1 37. Qd4 Re6 38. Qb2 Qc4 39. Qb3 Qh4+ 40. Bg3 Qg5 41. Qd5 Qxd5 42. Rxd5 Kg8 43. Rd2 Rea6 44. Be5 Rxa2 45. Rd7 R2a7 46. Rd3 Ra5 47. Bd6 Ra2 48. Re3 Kf7 49. Re7+ Kf6 50. f4 Rc2 51. Re3 Kf7 52. Kf3 Re8 53. Rxe8 Kxe8 54. f5 Kf7 55. e3 g6 56. Ke4 gxf5+ 57. Kxf5 Rf2+ 58. Ke4 Ke6 59. Kd3 Kd5 60. e4+ Kc6 61. Ke3 Rc2 62. h4 Rc1 63. Kf4 Rh1 64. Kg5 Rg1+ 65. Kf5 Rh1 66. Be7 Kd7 67. Bg5 Kc6 68. Ke6 Kxc5 69. e5 h5 70. Kf7 Re1 71. e6 1/2-1/2

[Event "NED-ch M corr"]
[Site "Netherlands"]
[Date "1990.??.??"]
[Round "?"]
[White "Groen, P."]
[Black "Stuart, Antoon J"]
[Result "1-0"]
[ECO "A26"]
[PlyCount "71"]
[EventDate "1990.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 0-0 5. d3 d6 6. e4 e5 7. Nge2 Nc6 8. 0-0 Be6 9. f4 Qd7 10. Nd5 Bg4 11. Nxf6+ Bxf6 12. Qe1 Bg7 13. Rf2 Rae8 14. Qf1 exf4 15. Bxf4 Bxb2 16. Rb1 Bxe2 17. Rxe2 Bd4+ 18. Kh1 Rb8 19. Rb5 a6 20. Rd5 Rfe8 21. Bg5 Bb6 22. Bh3 f5 23. Bg2 Nd4 24. Rb2 Ne6 25. Bf6 Rf8 26. e5 Bc5 27. d4 Bxd4 28. Rb3 Bc5 29. Qa1 f4 30. Rd1 b6 31. Rbd3 fxg3 32. exd6 cxd6 33. Bd5 gxh2 34. Re1 Rbe8 35. Bh8 Rf7 36. Rf3 1-0

[Event "NED-ch M corr"]
[Site "Netherlands"]
[Date "1990.??.??"]
[Round "?"]
[White "Groen, P."]
[Black "Zwikker, J."]
[Result "1-0"]
[ECO "A18"]
[PlyCount "57"]
[EventDate "1990.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. cxd5 exd5 5. e5 Ne4 6. Nf3 Nc6 7. Bb5 Be7 8. Qa4 Nc5 9. Bxc6+ Kf8 10. Qc2 bxc6 11. d4 Ne6 12. 0-0 c5 13. dxc5 g5 14. Rd1 c6 15. Ne4 h5 16. Be3 g4 17. Ne1 Bd7 18. Nd6 Bg5 19. b4 a6 20. a4 Bxe3 21. fxe3 Qg5 22. Qf2 Nd8 23. Qf4 Qg6 24. Nd3 h4 25. Qf6 Rh6 26. Qxg6 Rxg6 27. e4 Kg7 28. exd5 h3 29. e6 1-0

[Event "NED-ch M corr"]
[Site "Netherlands"]
[Date "1990.??.??"]
[Round "?"]
[White "Kerssemakers, HJM"]
[Black "Groen, P."]
[Result "1-0"]
[ECO "D34"]
[PlyCount "85"]
[EventDate "1990.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nf3 c5 4. cxd5 exd5 5. g3 Nc6 6. Bg2 Nf6 7. 0-0 Be7 8. Nc3 0-0 9. Bf4 c4 10. Ne5 Be6 11. b3 Bb4 12. Nb5 cxb3 13. Qxb3 Ba5 14. Rac1 Ne7 15. Nd3 Nf5 16. Bc7 Bxc7 17. Nxc7 Rb8 18. e3 Qd6 19. Nf4 Rfd8 20. Rfd1 Rd7 21. Ncxe6 fxe6 22. Rc5 g5 23. Nd3 Kg7 24. Rdc1 Rf8 25. Qc2 Qb6 26. a4 Qd8 27. Rc7 Ne8 28. Rxd7+ Qxd7 29. e4 dxe4 30. Nc5 Qe7 31. Qxe4 Rf6 32. Qe5 Qd6 33. Ne4 Qxe5 34. dxe5 Rg6 35. Rc8 Kf7 36. Rb8 Rg7 37. Nc5 Nd4 38. Bxb7 Nc7 39. Rd8 Ne2+ 40. Kf1 Nc3 41. Bc8 Kg6 42. Rd3 N7d5 43. Bxe6 1-0

[Event "NED-ch M corr"]
[Site "Netherlands"]
[Date "1990.??.??"]
[Round "?"]
[White "Lont, Addy"]
[Black "Groen, P."]
[Result "1-0"]
[ECO "D34"]
[PlyCount "67"]
[EventDate "1990.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. 0-0 0-0 9. dxc5 d4 10. Na4 Bf5 11. Bf4 Be4 12. Rc1 Qd5 13. Qb3 Qxb3 14. axb3 Rad8 15. Rfd1 Nd5 16. Bd6 Bxd6 17. cxd6 Bxf3 18. Bxf3 Rxd6 19. Nc5 Nde7 20. Nxb7 Rf6 21. Nc5 Rd8 22. Bg2 Rg6 23. Rc4 f5 24. Nd3 Rb8 25. b4 Rb6 26. Rdc1 a6 27. Rc5 Rd6 28. Bxc6 Rdxc6 29. R1c4 Rd6 30. Ne5 Kf8 31. Rc7 Rb5 32. f4 Rbd5 33. Ra7 g6 34. Rcc7 1-0

[Event "NED-ch H corr"]
[Site "Netherlands"]
[Date "1988.??.??"]
[Round "?"]
[White "Groen, P."]
[Black "Gouma, Ronald"]
[Result "1-0"]
[ECO "A20"]
[PlyCount "71"]
[EventDate "1988.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. c4 Nf6 2. g3 e5 3. Bg2 c6 4. d4 exd4 5. Qxd4 d5 6. cxd5 cxd5 7. Nf3 Nc6 8. Qa4 Be7 9. 0-0 0-0 10. Nc3 Bd7 11. Bg5 Ne4 12. Bxe7 Nxc3 13. Bxd8 Nxa4 14. Bg5 Rfe8 15. Rfd1 Rxe2 16. Rxd5 Be6 17. Rd2 Rxd2 18. Bxd2 Nxb2 19. Rb1 Nc4 20. Rxb7 Rb8 21. Rxb8+ Nxb8 22. Bf4 Nd7 23. Nd4 Bg4 24. f3 Bh5 25. Nc6 a5 26. g4 Bg6 27. Bf1 Ndb6 28. Ne7+ Kf8 29. Nxg6+ hxg6 30. Kf2 Ke7 31. h4 Nd6 32. Be5 f6 33. Bc3 Ndc4 34. Bd3 Kf7 35. Ke2 a4 36. Bd4 1-0

[Event "NED-ch H corr"]
[Site "Netherlands"]
[Date "1988.??.??"]
[Round "?"]
[White "Groen, P."]
[Black "Kiestra, SK."]
[Result "0-1"]
[ECO "A11"]
[PlyCount "85"]
[EventDate "1988.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. g3 d5 2. Bg2 Nf6 3. c4 c6 4. Nf3 Bf5 5. cxd5 cxd5 6. Qb3 Qb6 7. Qxb6 axb6 8. Nc3 e6 9. Nb5 Ra5 10. Nbd4 Bg6 11. d3 Nc6 12. Be3 Bc5 13. Nxc6 bxc6 14. Bxc5 Rxc5 15. Kd2 Kd7 16. b4 Rb5 17. Rhb1 c5 18. a3 Ra8 19. Nd4 Rxb4 20. axb4 Rxa1 21. Rxa1 cxd4 22. Rc1 Ne8 23. e3 dxe3+ 24. fxe3 Nd6 25. Bf3 Nf5 26. Bd1 d4 27. Ba4+ Kd8 28. e4 Ne7 29. Bb5 f6 30. Ra1 Nc8 31. Ra8 Kc7 32. Ba6 Nd6 33. Ra7+ Kc6 34. Rxg7 e5 35. Re7 Bf7 36. Bc8 Kb5 37. Be6 Bg6 38. Bd5 Kxb4 39. Re6 Kc5 40. Rxf6 b5 41. g4 b4 42. h4 Be8 43. Re6 0-1

[Event "NED-ch H corr"]
[Site "Netherlands"]
[Date "1988.??.??"]
[Round "?"]
[White "Groen, P."]
[Black "Meijer, M."]
[Result "0-1"]
[ECO "A89"]
[PlyCount "74"]
[EventDate "1988.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. c4 f5 2. g3 Nf6 3. Nc3 d6 4. d4 g6 5. Bg2 Bg7 6. Nf3 0-0 7. 0-0 Nc6 8. d5 Ne5 9. Nxe5 dxe5 10. e4 f4 11. b4 g5 12. Re1 a6 13. Bb2 Qe8 14. Rc1 Ng4 15. f3 Ne3 16. Rxe3 fxe3 17. g4 h5 18. h3 hxg4 19. hxg4 Bxg4 20. fxg4 Rf2 21. Rc2 Qf7 22. Qd3 Rf8 23. Bc1 e2 24. Rxe2 Rf1+ 25. Kh2 Rxc1 26. Qg3 Qf4 27. Re3 Rf6 28. Bh3 Rh6 29. Rf3 Qd2+ 30. Qf2 Rxc3 31. Qxd2 Rxf3 32. Qxg5 Rhxh3+ 33. Kg2 Kf7 34. c5 Bf6 35. Qc1 Rfg3+ 36. Kf2 Bh4 37. Qh6 Rxg4+ 0-1

[Event "NED-ch H corr"]
[Site "Netherlands"]
[Date "1988.??.??"]
[Round "?"]
[White "Van Loon, W."]
[Black "Groen, P."]
[Result "1/2-1/2"]
[ECO "B16"]
[PlyCount "87"]
[EventDate "1988.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 d5 2. Nc3 c6 3. e4 dxe4 4. Nxe4 Nf6 5. Nxf6+ gxf6 6. c3 h5 7. Bd3 Qd5 8. f3 Bf5 9. Ne2 Bxd3 10. Qxd3 Nd7 11. Qe4 e6 12. Kf2 Qa5 13. Bf4 0-0-0 14. b4 Qb6 15. a4 a5 16. bxa5 Qxa5 17. Rhb1 e5 18. Be3 Bh6 19. Bxh6 Rxh6 20. Rb4 Kc7 21. Rab1 b6 22. c4 Rb8 23. c5 Rhh8 24. Qf5 Rh6 25. f4 h4 26. fxe5 fxe5 27. cxb6+ Kc8 28. b7+ Kc7 29. Qc2 h3 30. Rb5 Qa7 31. Qc4 exd4 32. Nxd4 Rd6 33. R5b4 Ne5 34. Qc3 Qc5 35. Qxc5 Nd3+ 36. Kg1 Nxc5 37. Rc4 Rxb7 38. Nb5+ cxb5 39. Rxc5+ Kd7 40. axb5 hxg2 41. Kxg2 Rg6+ 42. Kf3 Rh6 43. Rb2 Rbb6 44. Kf4 1/2-1/2

[Event "NED-ch H corr"]
[Site "Netherlands"]
[Date "1988.??.??"]
[Round "?"]
[White "Van der Leek, Mark"]
[Black "Groen, P."]
[Result "0-1"]
[ECO "D32"]
[PlyCount "48"]
[EventDate "1988.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. e3 Nf6 7. Be2 cxd4 8. Nxd4 Bd6 9. 0-0 0-0 10. b3 Be5 11. Nxc6 bxc6 12. Bb2 Qe7 13. Rc1 Rd8 14. Qc2 Ng4 15. g3 h5 16. Na4 h4 17. Bxe5 Qxe5 18. Qxc6 hxg3 19. Kg2 Qh5 20. Bxg4 Bxg4 21. fxg3 Rac8 22. Qb7 Bh3+ 23. Kg1 Bxf1 24. Rxf1 Qe2 0-1

[Event "NED-ch H corr"]
[Site "Netherlands"]
[Date "1988.??.??"]
[Round "?"]
[White "Vrijbloed, W."]
[Black "Groen, P."]
[Result "0-1"]
[ECO "D34"]
[PlyCount "70"]
[EventDate "1988.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nf3 c5 4. cxd5 exd5 5. g3 Nc6 6. Bg2 Nf6 7. 0-0 Be7 8. Nc3 0-0 9. dxc5 d4 10. Na4 Bf5 11. Bf4 Be4 12. Rc1 Qd5 13. Qb3 Qxb3 14. axb3 Rad8 15. Rfd1 Nd5 16. Ne1 Nxf4 17. gxf4 f5 18. Nd3 Rf6 19. Kf1 Re6 20. b4 a6 21. Rd2 Rg6 22. Bf3 Rh6 23. Kg2 g5 24. Ne5 gxf4 25. Nxc6 Rg6+ 26. Kf1 Rxc6 27. Rcd1 Bf6 28. h3 Rc7 29. Kg2 Kf7 30. b3 d3 31. Bxe4 fxe4 32. exd3 f3+ 33. Kg3 Rcd7 34. Kf4 Rd4 35. Ra2 Ke6 0-1

[Event "NED BT corr"]
[Site "Netherlands"]
[Date "1987.??.??"]
[Round "?"]
[White "Groen, P."]
[Black "Dopper, Johan C"]
[Result "1/2-1/2"]
[ECO "B06"]
[PlyCount "56"]
[EventDate "1987.??.??"]
[EventType "tourn (corr)"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "Corr 2000"]
[Source "ChessBase"]
[SourceDate "2000.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. g3 Nf6 2. Bg2 d6 3. d4 g6 4. e4 Bg7 5. Ne2 0-0 6. 0-0 e5 7. c4 exd4 8. Nxd4 Nc6 9. Nxc6 bxc6 10. Qc2 Nd7 11. Bd2 a5 12. Bc3 Bxc3 13. Nxc3 Re8 14. h3 Nc5 15. f4 Rb8 16. Rad1 Bd7 17. Rd2 Rb4 18. Nd1 Qe7 19. Nf2 Reb8 20. b3 a4 21. Nd3 axb3 22. axb3 Rxb3 23. Nxc5 dxc5 24. Kh2 Be8 25. e5 Qe6 26. Rff2 R3b4 27. Bf1 f6 28. Qe4 Bf7 1/2-1/2

[Event "NED-chT"]
[Site "Netherlands"]
[Date "1969.??.??"]
[Round "?"]
[White "Groen, P."]
[Black "Bakker, Piet"]
[Result "0-1"]
[ECO "A00"]
[PlyCount "108"]
[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. g3 d5 2. Bg2 e5 3. d3 c6 4. Nf3 Bd6 5. 0-0 Ne7 6. c4 0-0 7. Nc3 Nd7 8. Rb1 Bb4 9. cxd5 cxd5 10. Bg5 Nb6 11. Qb3 Bxc3 12. bxc3 h6 13. Be3 Nd7 14. Rfc1 b6 15. Qb5 Bb7 16. a4 Rc8 17. c4 Bc6 18. Qb4 d4 19. Bd2 Ng6 20. h4 Re8 21. Bh3 Ngf8 22. a5 Rb8 23. Qd6 Bxf3 24. exf3 Nc5 25. Qxd8 Rexd8 26. Bf5 g6 27. Be4 f5 28. Bd5+ Kg7 29. axb6 axb6 30. Rd1 Nxd3 31. Bxh6+ Kxh6 32. Rxd3 Nd7 33. Rdb3 Nf6 34. Bc6 Rd6 35. Bb5 e4 36. fxe4 Nxe4 37. Rd1 Rbd8 38. Ra3 Nc5 39. Kf1 d3 40. f3 Re6 41. Rd2 g5 42. hxg5+ Kxg5 43. Kf2 Rh8 44. Kg2 Re1 45. Bc6 f4 46. gxf4+ Kxf4 47. Ra7 Reh1 48. Rf7+ Ke3 49. Rf2 R8h2+ 50. Kg3 Rh3+ 51. Kg2 R1h2+ 52. Kg1 Rxf2 53. Re7+ Kd4 54. Kxf2 d2 0-1

