[Event "NED-PAN email"]
[Site "ICCF email"]
[Date "2016.07.17"]
[Round "?.8"]
[White "Gonzalez, Jorge Eldis"]
[Black "Groffen, JWA"]
[Result "1/2-1/2"]
[ECO "D07"]
[WhiteElo "2088"]
[PlyCount "81"]
[EventDate "2016.??.??"]
[EventType "team-match (corr)"]
[EventRounds "2"]
[EventCountry "NED"]
[SourceTitle "Corr 2017"]
[Source "ChessBase"]
[SourceDate "2017.09.19"]
[SourceVersion "1"]
[SourceVersionDate "2017.09.19"]
[SourceQuality "1"]
[WhiteTeam "Panama"]
[BlackTeam "Netherlands"]
[WhiteTeamCountry "PAN"]
[BlackTeamCountry "NED"]

1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 Bg4 5. Bxc4 e6 6. Nc3 Nc6 7. h3 Bh5 8. 0-0 Bd6 9. Be2 0-0 10. Re1 a6 11. a3 Bg6 12. Nh4 e5 13. Nxg6 hxg6 14. dxe5 Bxe5 15. Qc2 Qe7 16. Bd2 Rad8 17. Red1 Bd6 18. Bf3 Rfe8 19. Be1 Qe5 20. g3 Qe6 21. Kg2 Rb8 22. Nd5 Ne5 23. Nxf6+ Qxf6 24. Be2 b5 25. Rac1 c5 26. f4 Nc4 27. Bxc4 bxc4 28. Bc3 Qe6 29. e4 g5 30. e5 Bc7 31. Qe4 gxf4 32. gxf4 Rbd8 33. Rxd8 Rxd8 34. f5 Qh6 35. Re1 Rd3 36. Qg4 Re3 37. Rxe3 Qxe3 38. e6 f6 39. Qf3 Qg5+ 40. Kf2 Bd6 41. Qg4 1/2-1/2

[Event "NED-PAN email"]
[Site "ICCF email"]
[Date "2016.07.17"]
[Round "?.8"]
[White "Groffen, JWA"]
[Black "Gonzalez, Jorge Eldis"]
[Result "1/2-1/2"]
[ECO "C69"]
[BlackElo "2088"]
[PlyCount "66"]
[EventDate "2016.??.??"]
[EventType "team-match (corr)"]
[EventRounds "2"]
[EventCountry "NED"]
[SourceTitle "Corr 2017"]
[Source "ChessBase"]
[SourceDate "2017.09.19"]
[SourceVersion "1"]
[SourceVersionDate "2017.09.19"]
[SourceQuality "1"]
[WhiteTeam "Netherlands"]
[BlackTeam "Panama"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "PAN"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. 0-0 f6 6. d4 exd4 7. Nxd4 c5 8. Ne2 Qxd1 9. Rxd1 Bd7 10. Nbc3 0-0-0 11. Be3 Bd6 12. Bf4 Bxf4 13. Nxf4 Ne7 14. f3 f5 15. Ncd5 Rhe8 16. Nxe7+ Rxe7 17. exf5 Bxf5 18. Rxd8+ Kxd8 19. Rd1+ Rd7 20. Rxd7+ Kxd7 21. c3 g5 22. Nd5 Kd6 23. Ne3 Be6 24. a3 Ke5 25. Kf2 Kf4 26. g4 Ke5 27. Ng2 Kd5 28. f4 Kc4 29. fxg5 Kb3 30. h4 Bxg4 31. Nf4 Kxb2 32. h5 Bf5 33. h6 Kxc3 1/2-1/2

[Event "NED FR-A email"]
[Site "ICCF email"]
[Date "2016.05.16"]
[Round "?"]
[White "Falandt, Jan"]
[Black "Groffen, JWA"]
[Result "1/2-1/2"]
[ECO "D02"]
[PlyCount "52"]
[EventDate "2016.??.??"]
[EventType "tourn (corr)"]
[EventRounds "8"]
[EventCountry "NED"]
[SourceTitle "Corr 2017"]
[Source "ChessBase"]
[SourceDate "2017.09.19"]
[SourceVersion "1"]
[SourceVersionDate "2017.09.19"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. g3 c6 4. Bg2 Bf5 5. 0-0 e6 6. c3 h6 7. Nbd2 Bd6 8. Re1 Nbd7 9. Nh4 Bh7 10. e4 dxe4 11. Nxe4 Nxe4 12. Bxe4 Bxe4 13. Rxe4 0-0 14. Ng2 Nf6 15. Re1 c5 16. Be3 Qb6 17. Qe2 Rfd8 18. Rad1 Nd5 19. dxc5 Bxc5 20. Bxc5 Qxc5 21. Rd4 Nf6 22. Red1 Rxd4 23. Rxd4 Qa5 24. a3 Rd8 25. b4 Qc7 26. Rxd8+ Qxd8 1/2-1/2

[Event "NED FR-A email"]
[Site "ICCF email"]
[Date "2016.05.16"]
[Round "?"]
[White "Groffen, JWA"]
[Black "De Jong, Peter JJ"]
[Result "1/2-1/2"]
[ECO "B97"]
[BlackElo "2423"]
[PlyCount "49"]
[EventDate "2016.??.??"]
[EventType "tourn (corr)"]
[EventRounds "8"]
[EventCountry "NED"]
[SourceTitle "Corr 2017"]
[Source "ChessBase"]
[SourceDate "2017.09.19"]
[SourceVersion "1"]
[SourceVersionDate "2017.09.19"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qb6 8. Qd2 Qxb2 9. Rb1 Qa3 10. e5 h6 11. Bh4 dxe5 12. fxe5 g5 13. exf6 gxh4 14. Be2 Qa5 15. 0-0 Nd7 16. Rbd1 h3 17. Qd3 hxg2 18. Rf4 Bd6 19. Rf2 Ne5 20. Qg3 Bc7 21. Ncb5 axb5 22. Bxb5+ Bd7 23. Nxe6 Bxb5 24. Ng7+ Kf8 25. Ne6+ 1/2-1/2

[Event "NED FR-A email"]
[Site "ICCF email"]
[Date "2016.05.16"]
[Round "?"]
[White "Groffen, JWA"]
[Black "Drenthen, Arjan"]
[Result "1/2-1/2"]
[ECO "C42"]
[BlackElo "1972"]
[PlyCount "65"]
[EventDate "2016.??.??"]
[EventType "tourn (corr)"]
[EventRounds "8"]
[EventCountry "NED"]
[SourceTitle "Corr 2017"]
[Source "ChessBase"]
[SourceDate "2017.09.19"]
[SourceVersion "1"]
[SourceVersionDate "2017.09.19"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. 0-0 Nc6 8. c4 Nb4 9. Be2 0-0 10. Nc3 Bf5 11. a3 Nxc3 12. bxc3 Nc6 13. Re1 Re8 14. cxd5 Qxd5 15. Bf4 Rac8 16. h3 Be4 17. Qc1 a6 18. c4 Qf5 19. Ne5 Nxe5 20. Bxe5 c5 21. Bg4 Qg6 22. Qf4 h5 23. Qxe4 Qxe4 24. Rxe4 hxg4 25. d5 Bf6 26. Rae1 Rxe5 27. Rxe5 Bxe5 28. Rxe5 gxh3 29. gxh3 b5 30. cxb5 axb5 31. d6 Rd8 32. Rxc5 Rxd6 33. Rxb5 1/2-1/2

[Event "NED FR-A email"]
[Site "ICCF email"]
[Date "2016.05.16"]
[Round "?"]
[White "Groffen, JWA"]
[Black "Eshuis, Hans"]
[Result "1/2-1/2"]
[ECO "C18"]
[BlackElo "2215"]
[PlyCount "107"]
[EventDate "2016.??.??"]
[EventType "tourn (corr)"]
[EventRounds "8"]
[EventCountry "NED"]
[SourceTitle "Corr 2017"]
[Source "ChessBase"]
[SourceDate "2017.09.19"]
[SourceVersion "1"]
[SourceVersionDate "2017.09.19"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Qg4 Qc7 8. Bd3 cxd4 9. Ne2 dxc3 10. Qxg7 Rg8 11. Qxh7 Qxe5 12. h4 Nd7 13. Bf4 Qf6 14. Bg5 Qh8 15. Qxh8 Rxh8 16. Nxc3 a6 17. 0-0-0 f6 18. Be3 Ne5 19. Be2 Nf5 20. Bb6 Kf7 21. h5 Bd7 22. g4 Nh6 23. f3 Rhc8 24. Bd4 Rc7 25. g5 Nf5 26. g6+ Kg8 27. f4 Nxd4 28. Rxd4 Nc6 29. Rd2 Rac8 30. Kb2 Ne7 31. Nd1 Nf5 32. Bg4 Ng3 33. Rh3 Ne4 34. Rg2 f5 35. Bf3 Nf6 36. h6 Ba4 37. Rhh2 d4 38. c3 Bxd1 39. Bxd1 dxc3+ 40. Kb1 Nd5 41. Bb3 Nxf4 42. Kc2 Rd7 43. Rf2 Rd2+ 44. Rxd2 cxd2+ 45. Kxd2 Rd8+ 46. Ke3 Nxg6 47. Bxe6+ Kh8 48. Bxf5 Rd6 49. Be4 b5 50. Rh5 Nf8 51. Kf4 Rf6+ 52. Bf5 Rc6 53. Bd3 Ne6+ 54. Kg4 1/2-1/2

[Event "NED FR-A email"]
[Site "ICCF email"]
[Date "2016.05.16"]
[Round "?"]
[White "Groffen, JWA"]
[Black "Faber, Krine A"]
[Result "1/2-1/2"]
[ECO "B19"]
[BlackElo "2101"]
[PlyCount "94"]
[EventDate "2016.??.??"]
[EventType "tourn (corr)"]
[EventRounds "8"]
[EventCountry "NED"]
[SourceTitle "Corr 2017"]
[Source "ChessBase"]
[SourceDate "2017.09.19"]
[SourceVersion "1"]
[SourceVersionDate "2017.09.19"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7 8. h5 Bh7 9. Bd3 Bxd3 10. Qxd3 e6 11. Bd2 Ngf6 12. 0-0-0 Be7 13. Kb1 0-0 14. Ne4 Nxe4 15. Qxe4 Nf6 16. Qe2 Qd5 17. Be3 Bd6 18. Nh4 a5 19. g4 a4 20. a3 Ra6 21. Rdg1 Rb6 22. Ka1 Qa5 23. d5 Nxd5 24. Bxb6 Nxb6 25. g5 hxg5 26. h6 Bxa3 27. Ng6 fxg6 28. Qxe6+ Kh7 29. hxg7+ Kxg7 30. bxa3 Qc5 31. Rg3 Qd4+ 32. Kb1 Qd5 33. Qh3 Nc4 34. Qh6+ Kf7 35. Rxg5 Nxa3+ 36. Kc1 Qe4 37. Qh7+ Ke8 38. Qxg6+ Qxg6 39. Rxg6 Rf7 40. Kb2 Nc4+ 41. Kc3 Nb6 42. Kb4 Rf4+ 43. Kc5 Nd7+ 44. Kd6 Nf8 45. Rg7 Rf6+ 46. Ke5 Rxf2 47. Rxb7 Rxc2 1/2-1/2

[Event "NED FR-A email"]
[Site "ICCF email"]
[Date "2016.05.16"]
[Round "?"]
[White "Knigge, Marcel"]
[Black "Groffen, JWA"]
[Result "0-1"]
[ECO "B01"]
[PlyCount "102"]
[EventDate "2016.??.??"]
[EventType "tourn (corr)"]
[EventRounds "8"]
[EventCountry "NED"]
[SourceTitle "Corr 2017"]
[Source "ChessBase"]
[SourceDate "2017.09.19"]
[SourceVersion "1"]
[SourceVersionDate "2017.09.19"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. d4 Nf6 5. Nf3 c6 6. a3 Bg4 7. Be2 Nbd7 8. 0-0 e6 9. h3 Bh5 10. Bg5 Qc7 11. Nd2 Bg6 12. Bh4 Bd6 13. Nc4 Bh2+ 14. Kh1 Bf4 15. g3 b5 16. Ne3 Bxe3 17. fxe3 Nd5 18. Qd2 0-0 19. Bf3 Rac8 20. e4 Nxc3 21. Qxc3 Rfe8 22. a4 b4 23. Qxb4 c5 24. dxc5 Nxc5 25. g4 a5 26. Qd4 e5 27. Qd5 Ne6 28. c3 Nf4 29. Qa2 Nxh3 30. Rad1 Nf4 31. Rfe1 Rb8 32. Rd2 Qc6 33. Qa3 h5 34. gxh5 Bxh5 35. Bxh5 Nxh5 36. Qa1 Re6 37. Qb1 Rh6 38. Rh2 Nf4 39. Rd1 Qb6 40. Rg1 Rxh4 41. Rxh4 Qf2 42. Rxf4 exf4 43. Rg2 Qf3 44. Qc2 Rd8 45. Qe2 Qh3+ 46. Rh2 f3 47. Qe1 f2 48. Qxf2 Rd1+ 49. Qg1 Qf3+ 50. Rg2 Rxg1+ 51. Kxg1 Qxe4 0-1

[Event "NED FR-A email"]
[Site "ICCF email"]
[Date "2016.05.16"]
[Round "?"]
[White "Stigter, John"]
[Black "Groffen, JWA"]
[Result "1-0"]
[ECO "B01"]
[WhiteElo "2242"]
[PlyCount "77"]
[EventDate "2016.??.??"]
[EventType "tourn (corr)"]
[EventRounds "8"]
[EventCountry "NED"]
[SourceTitle "Corr 2017"]
[Source "ChessBase"]
[SourceDate "2017.09.19"]
[SourceVersion "1"]
[SourceVersionDate "2017.09.19"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. d4 Nf6 5. Nf3 c6 6. Ne5 Nbd7 7. Nc4 Qc7 8. Qf3 Nb6 9. Bf4 Qd7 10. Nxb6 axb6 11. 0-0-0 Qd8 12. Qe3 Nd5 13. Nxd5 Qxd5 14. c4 Qe6 15. d5 Qxe3+ 16. Bxe3 Rxa2 17. dxc6 Ra1+ 18. Kc2 Rxd1 19. Kxd1 bxc6 20. Bxb6 Bf5 21. Kd2 e5 22. c5 Be6 23. Ba6 Bd5 24. Ra1 Kd7 25. Kc3 Be7 26. Bc4 Ke6 27. Ra7 e4 28. Bxd5+ cxd5 29. b4 Bf6+ 30. Kb3 Bd4 31. f3 f5 32. Bc7 Re8 33. Bg3 Be5 34. Ra6+ Kd7 35. f4 Bb8 36. b5 e3 37. Ra8 Kc7 38. Be1 Re4 39. c6 1-0

[Event "NED FR-A email"]
[Site "ICCF email"]
[Date "2016.05.16"]
[Round "?"]
[White "Vriens, Huib"]
[Black "Groffen, JWA"]
[Result "1/2-1/2"]
[ECO "C26"]
[WhiteElo "2001"]
[PlyCount "77"]
[EventDate "2016.??.??"]
[EventType "tourn (corr)"]
[EventRounds "8"]
[EventCountry "NED"]
[SourceTitle "Corr 2017"]
[Source "ChessBase"]
[SourceDate "2017.09.19"]
[SourceVersion "1"]
[SourceVersionDate "2017.09.19"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. g3 d5 4. exd5 Nxd5 5. Nge2 Bg4 6. Bg2 Nxc3 7. bxc3 Nc6 8. 0-0 Bc5 9. d4 exd4 10. h3 Be6 11. cxd4 Nxd4 12. Bb2 Nc6 13. Bxg7 Rg8 14. Bc3 Qd6 15. Bf6 Bc4 16. Qxd6 cxd6 17. Rfe1 Kd7 18. g4 Rg6 19. Bb2 Re6 20. Nc3 Rxe1+ 21. Rxe1 Bd4 22. a3 h6 23. Rb1 Rc8 24. Nd1 Ba2 25. Ra1 Bxb2 26. Rxa2 Be5 27. Be4 Ne7 28. Bxb7 Rb8 29. Bf3 Rb1 30. Kf1 Nd5 31. Ke1 Nf4 32. h4 Bc3+ 33. Kf1 Rc1 34. a4 a5 35. Ra3 Bf6 36. Rb3 Bxh4 37. Rb5 Rxc2 38. Rxa5 Ke6 39. Rf5 1/2-1/2

[Event "NED-ch H corr"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Groffen, JWA"]
[Black "De Jong"]
[Result "1-0"]
[ECO "D13"]
[PlyCount "57"]
[EventDate "1991.??.??"]
[EventType "swiss (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr 2002"]
[Source "ChessBase"]
[SourceDate "2002.05.23"]
[SourceVersion "1"]
[SourceVersionDate "2002.05.23"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d5 3. c4 c6 4. Nc3 e6 5. cxd5 cxd5 6. Bg5 Qb6 7. Bxf6 gxf6 8. Rc1 Qxb2 9. Nxd5 Bd7 10. Nxf6+ Kd8 11. Nxd7 Bb4+ 12. Nd2 Nxd7 13. Rc2 Qxd4 14. e3 Qd6 15. Bb5 Rc8 16. 0-0 a6 17. Nc4 Qxd1 18. Rxd1 axb5 19. Rxd7+ Kxd7 20. Nb6+ Kd6 21. Nxc8+ Ke5 22. Na7 Ba5 23. Nxb5 Rd8 24. Kf1 Rd7 25. Nd4 Bb6 26. Nb3 Kf6 27. Rc4 Kg7 28. Rb4 Rd6 29. a4 1-0

[Event "NED-ch H corr"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Groffen, JWA"]
[Black "Van der Bosch, F."]
[Result "1-0"]
[ECO "E20"]
[PlyCount "57"]
[EventDate "1991.??.??"]
[EventType "swiss (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 e6 3. Nc3 Bb4 4. f3 d5 5. a3 Be7 6. e4 dxc4 7. Bxc4 c5 8. dxc5 Qxd1+ 9. Kxd1 Bxc5 10. Nb5 Na6 11. b4 Bxg1 12. Rxg1 0-0 13. Ke2 Bd7 14. Nd6 Rfb8 15. Be3 Nc7 16. Rgd1 Ba4 17. Rd2 Nce8 18. Nb5 a6 19. Nc3 Bc6 20. e5 Nd7 21. f4 b5 22. Bd3 Nb6 23. Bxb6 Rxb6 24. Be4 f5 25. Bf3 Rc8 26. Rd3 Bxf3+ 27. Kxf3 Rbc6 28. Ne2 Rc2 29. Rad1 1-0

[Event "NED-ch H corr"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Groffen, JWA"]
[Black "Van der Graaf, GE."]
[Result "1-0"]
[ECO "D36"]
[PlyCount "75"]
[EventDate "1991.??.??"]
[EventType "swiss (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 Nf6 4. cxd5 exd5 5. Bg5 c6 6. Qc2 Be7 7. e3 Nbd7 8. Bd3 0-0 9. Nf3 Re8 10. 0-0 Nf8 11. h3 Ng6 12. Ne5 Be6 13. f4 Nh5 14. Bxe7 Rxe7 15. g4 Ng3 16. Rf3 Ne4 17. Nxe4 dxe4 18. Bxe4 Re8 19. Bd3 a5 20. f5 Nxe5 21. dxe5 Bc8 22. e6 fxe6 23. f6 gxf6 24. Bxh7+ Kh8 25. Qg6 Rf8 26. Raf1 Qc7 27. Qh6 Qg7 28. Rxf6 Qxh6 29. Rxh6 Rxf1+ 30. Kxf1 Kg7 31. Rh5 Bd7 32. Bc2 Rh8 33. Rxh8 Kxh8 34. Kf2 e5 35. Bf5 Bxf5 36. gxf5 Kg7 37. Kf3 Kf6 38. Ke4 1-0

[Event "NED-ch H corr"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Herbold, Manfred"]
[Black "Groffen, JWA"]
[Result "1-0"]
[ECO "E15"]
[PlyCount "72"]
[EventDate "1991.??.??"]
[EventType "swiss (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 b6 2. d4 e6 3. Nf3 Nf6 4. g3 Ba6 5. Qa4 Bb7 6. Bg2 c5 7. 0-0 cxd4 8. Nxd4 Bxg2 9. Kxg2 Qc7 10. Nc3 Be7 11. Kg1 a6 12. Rd1 0-0 13. Ndb5 Qb7 14. Nd6 Bxd6 15. Rxd6 Ne4 16. Nxe4 Qxe4 17. Qd1 Nc6 18. b3 b5 19. cxb5 axb5 20. Rxd7 Rfd8 21. Be3 h5 22. Rc1 Rdc8 23. Qc2 Qb4 24. Rb7 Nd4 25. Qxc8+ Rxc8 26. Rxc8+ Kh7 27. Bxd4 Qxd4 28. Rxf7 Qd1+ 29. Kg2 Qxe2 30. Rcc7 Kg6 31. Rxg7+ Kf6 32. Rcf7+ Ke5 33. Rg5+ Kd6 34. Rf3 b4 35. Rxh5 Qe4 36. Ra5 e5 1-0

[Event "NED-ch H corr"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Van der Dikkenberg, Erik"]
[Black "Groffen, JWA"]
[Result "0-1"]
[ECO "C07"]
[PlyCount "74"]
[EventDate "1991.??.??"]
[EventType "swiss (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 e6 2. d4 d5 3. Nd2 c5 4. exd5 Qxd5 5. Ngf3 cxd4 6. Bc4 Qd6 7. 0-0 Nf6 8. Nb3 Nc6 9. Nbxd4 Nxd4 10. Nxd4 Bd7 11. a4 a6 12. b3 Qc7 13. Qe2 Bd6 14. h3 0-0 15. Bb2 e5 16. Nf3 e4 17. Nd2 Bh2+ 18. Kh1 Be5 19. Bxe5 Qxe5 20. a5 Rae8 21. Rfe1 Kh8 22. Qe3 Qh5 23. Be2 Qg6 24. c4 Ng8 25. Qf4 f5 26. Nf1 Qf6 27. Rad1 Be6 28. Rd6 Ne7 29. Red1 Ng6 30. Qd2 Qh4 31. Kg1 f4 32. f3 e3 33. Qe1 Qg5 34. Kh2 Nh4 35. g4 h5 36. Rxe6 Rxe6 37. Rd5 Qe7 0-1

[Event "NED-ch H corr"]
[Site "Netherlands"]
[Date "1987.??.??"]
[Round "?"]
[White "Lambooy, GJ."]
[Black "Groffen, JWA"]
[Result "1/2-1/2"]
[ECO "C40"]
[PlyCount "89"]
[EventDate "1987.??.??"]
[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 e5 2. Nf3 f5 3. Bc4 fxe4 4. Nxe5 d5 5. Qh5+ g6 6. Nxg6 hxg6 7. Qxg6+ Kd7 8. Bxd5 Nf6 9. Nc3 Qe7 10. d4 c6 11. Bc4 b5 12. Bg5 Bg7 13. Be2 Rg8 14. 0-0-0 a6 15. Bxf6 Qxf6 16. Qxf6 Bxf6 17. Nxe4 Bg5+ 18. Nxg5 Rxg5 19. g3 Kd6 20. f4 Rg7 21. Bf3 Bg4 22. Bxg4 Rxg4 23. Rhe1 Nd7 24. Rd3 Rh8 25. Re2 Nf6 26. Ra3 Rg7 27. Rxa6 Ng4 28. h4 Nh6 29. d5 Rxg3 30. dxc6 Nf5 31. Rd2+ Kc5 32. b4+ Kxb4 33. Rd5 Ne3 34. Rd3 Rg1+ 35. Kd2 Nc4+ 36. Ke2 Rg2+ 37. Kf3 Rxc2 38. Rd7 Rf8 39. Re7 Rc3+ 40. Kg4 Ne3+ 41. Kh5 Rf5+ 42. Kg6 Rxf4 43. a3+ Kb3 44. Re5 Rxh4 45. Rxb5+ 1/2-1/2

[Event "corr"]
[Site "corr"]
[Date "1981.??.??"]
[Round "?"]
[White "Groffen, JWA"]
[Black "Franssen"]
[Result "1-0"]
[ECO "A00"]
[PlyCount "65"]
[EventDate "1981.??.??"]
[EventType "tourn (corr)"]
[EventRounds "1"]
[SourceTitle "Corr 2000"]
[Source "ChessBase"]
[SourceDate "2000.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. b4 e5 2. Bb2 Bxb4 3. Bxe5 Nf6 4. Nf3 Nc6 5. Bb2 d5 6. e3 0-0 7. Be2 Bg4 8. 0-0 Qe7 9. d3 Rad8 10. h3 Bh5 11. Nbd2 Rfe8 12. a3 Ba5 13. d4 h6 14. c4 Bxd2 15. Nxd2 Bg6 16. Rc1 a6 17. Re1 Na7 18. Qb3 c6 19. a4 b5 20. axb5 dxc4 21. Nxc4 cxb5 22. Ne5 Be4 23. Ba3 Qb7 24. f3 Bd5 25. Qb2 Nd7 26. Nxd7 Qxd7 27. e4 Bb7 28. d5 Rc8 29. Bc5 Ra8 30. Bb6 Rec8 31. Qd4 Rxc1 32. Rxc1 Rc8 33. Rd1 1-0

[Event "NED corr"]
[Site "Netherlands"]
[Date "1979.??.??"]
[Round "?"]
[White "Groffen, JWA"]
[Black "Diepstraten, Leonardus CM"]
[Result "1/2-1/2"]
[ECO "B05"]
[PlyCount "74"]
[EventDate "1979.??.??"]
[EventType "tourn (corr)"]
[EventRounds "2"]
[EventCountry "NED"]
[SourceTitle "Corr 2000"]
[Source "ChessBase"]
[SourceDate "2000.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. Be2 c6 6. 0-0 Bxf3 7. Bxf3 dxe5 8. dxe5 e6 9. Qe2 Bc5 10. c4 Ne7 11. Re1 Qc7 12. Bd2 Ng6 13. Bc3 Qb6 14. Nd2 Nf4 15. Qf1 0-0 16. b4 Bd4 17. Bxd4 Qxd4 18. Rad1 Qb2 19. Nb3 Qxa2 20. Na5 Qa4 21. Nxb7 Qxb4 22. Rb1 Qe7 23. Nd6 f6 24. Rb7 Qd8 25. Rd1 fxe5 26. Nf5 Qf6 27. Ng3 Rd8 28. Ne4 Qf8 29. g3 Rxd1 30. Qxd1 Ng6 31. Bg4 Na6 32. Bxe6+ Kh8 33. Ng5 h6 34. Nf7+ Kh7 35. Qc2 Nc5 36. Nxe5 Qf6 37. Nxg6 Nxe6 1/2-1/2

[Event "corr"]
[Site "corr"]
[Date "1979.??.??"]
[Round "?"]
[White "Groffen, JWA"]
[Black "Van Raay"]
[Result "0-1"]
[ECO "B97"]
[PlyCount "62"]
[EventDate "1979.01.03"]
[EventType "match (corr)"]
[EventRounds "10"]
[SourceTitle "Corr 2000"]
[Source "ChessBase"]
[SourceDate "2000.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qb6 8. Qd2 Qxb2 9. Nb3 Qa3 10. Bxf6 gxf6 11. Be2 Nc6 12. 0-0 h5 13. Nb1 Qb4 14. Qe3 d5 15. exd5 Ne7 16. Nc3 Nf5 17. Qd3 Qb6+ 18. Rf2 Bd6 19. Na4 Qc7 20. Qe4 b5 21. Nb2 Bb7 22. Rd1 Ba3 23. c4 Bxb2 24. c5 Ba3 25. c6 Bc8 26. Nd4 Nd6 27. Qe3 Bc5 28. Nxe6 Bxe3 29. Nxc7+ Kd8 30. Nxa8 Ne4 31. Rdf1 Bg4 0-1

[Event "ITA corr"]
[Site "Italy"]
[Date "1971.??.??"]
[Round "?"]
[White "Ferri, Michael A"]
[Black "Groffen, JWA"]
[Result "1-0"]
[ECO "D34"]
[PlyCount "51"]
[EventDate "1971.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "ITA"]
[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. Bf4 a6 10. Rc1 cxd4 11. Nxd4 Bd6 12. Nxd5 Bxf4 13. Nxc6 bxc6 14. Nxf4 Rb8 15. Qxd8 Rxd8 16. Nd3 Bf5 17. Rfd1 Bxd3 18. Rxd3 Rxd3 19. exd3 g6 20. Rxc6 Ng4 21. b3 Rd8 22. Bf1 Ne5 23. Rxa6 Nxd3 24. Bxd3 Rxd3 25. b4 Kf8 26. b5 1-0

