[Event "Groningen SO ON Mini op"]
[Site "Groningen"]
[Date "2001.12.29"]
[Round "4"]
[White "Wiersma, Tjalling"]
[Black "Vermeulen, Frans"]
[Result "0-1"]
[ECO "A84"]
[WhiteElo "2063"]
[BlackElo "1910"]
[PlyCount "58"]
[EventDate "2001.12.26"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 f5 4. Bf4 c6 5. Nf3 Nf6 6. e3 Bd6 7. Ne5 0-0 8. Bd3 Ne4 9. Bxe4 fxe4 10. 0-0 Bxe5 11. Bxe5 Nd7 12. Bg3 Qg5 13. Qe2 b6 14. b4 Bb7 15. a4 a5 16. b5 Rfc8 17. Qa2 c5 18. cxd5 Bxd5 19. Nxd5 exd5 20. dxc5 Nxc5 21. Qb2 Nd3 22. Qd4 Qd8 23. Rad1 Rc4 24. Qa1 Qe7 25. f3 Qc5 26. fxe4 Qxe3+ 27. Bf2 Nxf2 28. Rxf2 Rf8 29. Rdd2 Rxf2 0-1

[Event "Groningen SO ON Mini op"]
[Site "Groningen"]
[Date "2001.12.27"]
[Round "2"]
[White "Wiersma, Tjalling"]
[Black "Hulshof, Peter"]
[Result "0-1"]
[ECO "A42"]
[WhiteElo "2063"]
[BlackElo "2214"]
[PlyCount "80"]
[EventDate "2001.12.26"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4 Nc6 5. Be3 e5 6. d5 Nce7 7. Bd3 f5 8. f3 Nf6 9. Nge2 0-0 10. Qd2 c5 11. dxc6 bxc6 12. Rd1 Be6 13. 0-0 f4 14. Bf2 Qd7 15. b4 g5 16. Kh1 g4 17. Qc2 Qe8 18. Ng1 g3 19. hxg3 Qh5+ 20. Nh3 Bxh3 21. gxh3 Qxh3+ 22. Kg1 fxg3 23. Be3 Nh5 24. Qg2 Qh4 25. Ne2 Ng6 26. Qh1 Qxh1+ 27. Kxh1 Nh4 28. Kg1 Nxf3+ 29. Kg2 Nh4+ 30. Kh3 Ng6 31. Nxg3 Nhf4+ 32. Kh2 Rab8 33. a3 a5 34. b5 cxb5 35. cxb5 Nxd3 36. Rxd3 Rxf1 37. Nxf1 Rxb5 38. Rxd6 Rb2+ 39. Nd2 Bf8 40. Kg3 Bxd6 0-1

[Event "Groningen SO ON Mini op-A"]
[Site "Groningen"]
[Date "2000.??.??"]
[Round "4"]
[White "Wiersma, Tjalling"]
[Black "De Rover, Yong Hoon"]
[Result "0-1"]
[ECO "A59"]
[PlyCount "74"]
[EventDate "2000.12.??"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bxa6 7. e4 Bxf1 8. Kxf1 d6 9. Nf3 Bg7 10. g3 0-0 11. Kg2 Nbd7 12. Re1 Ng4 13. Qe2 Qa5 14. h3 Nge5 15. Nd2 Qa6 16. Nf3 Nxf3 17. Qxf3 Rfb8 18. Qe2 Ne5 19. Qxa6 Rxa6 20. Re2 Nd3 21. Nd1 Rxa2 22. Rb1 c4 23. Rd2 Rb4 24. Kf1 Nc5 25. Rc2 Nxe4 26. Bf4 g5 27. Be3 c3 28. Kg2 Rb3 29. Kf3 f5 30. g4 cxb2 31. gxf5 Nc5 32. Ke2 Ra1 33. Rbxb2 Bxb2 34. Nxb2 Ra2 35. Bd2 Na4 36. f6 Rbxb2 37. Rxb2 Nxb2 0-1

[Event "Groningen op-B"]
[Site "Groningen"]
[Date "1995.??.??"]
[Round "2"]
[White "Wiersma, Tjalling"]
[Black "Van der Leest, Bert"]
[Result "1-0"]
[ECO "A59"]
[PlyCount "59"]
[EventDate "1995.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. e4 Bxf1 8. Kxf1 g6 9. g3 Bg7 10. Kg2 0-0 11. Nf3 Nbd7 12. Re1 Ng4 13. Nd2 Nge5 14. Qe2 Nb6 15. f4 Ned7 16. a4 Ra7 17. a5 Qa8 18. a6 Bxc3 19. bxc3 f5 20. c4 Rf7 21. exf5 gxf5 22. Nf3 Rxa6 23. Bb2 h6 24. Nh4 Ra2 25. Kg1 Qa4 26. Nxf5 Rxa1 27. Bxa1 Qxc4 28. Qg4+ Kf8 29. Bg7+ Kg8 30. Nxh6+ 1-0

[Event "NED jub25 corr9193"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Ekebjaerg, Ove"]
[Black "Wiersma, Tjalling"]
[Result "1-0"]
[ECO "C00"]
[PlyCount "63"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "19"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. Nc3 d5 2. e4 e6 3. f4 dxe4 4. Nxe4 Nf6 5. Qe2 Be7 6. Nf3 0-0 7. g3 c5 8. Bg2 Nc6 9. d3 Nd4 10. Qd1 Nd5 11. 0-0 Bd7 12. c4 Nxf3+ 13. Bxf3 Nf6 14. b3 Bc6 15. Bb2 Nxe4 16. dxe4 Qxd1 17. Raxd1 Rfd8 18. Kf2 f6 19. Ke3 Kf7 20. Bc3 Rxd1 21. Bxd1 Rd8 22. Bc2 b6 23. g4 Kg8 24. h4 Be8 25. h5 Bf7 26. e5 fxe5 27. Bxe5 Bf6 28. Bxf6 gxf6 29. h6 Rd4 30. Be4 Rd6 31. f5 e5 32. Bd5 1-0

[Event "NED jub25 corr9193"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Kolenbrander, Joop N"]
[Black "Wiersma, Tjalling"]
[Result "1/2-1/2"]
[ECO "C18"]
[PlyCount "49"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "19"]
[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. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Qg4 cxd4 8. Qxg7 Rg8 9. Qxh7 Qc7 10. Ne2 dxc3 11. f4 Bd7 12. Rb1 Nbc6 13. Qd3 Nf5 14. Rg1 0-0-0 15. g4 Nh4 16. Rg3 f6 17. exf6 e5 18. Qxc3 e4 19. f5 d4 20. Qc5 Nf3+ 21. Kd1 Qe5 22. Qc4 d3 23. Nc3 Nxh2 24. Nxe4 Bxf5 25. gxf5 1/2-1/2

[Event "NED jub25 corr9193"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Kramer, Haije J"]
[Black "Wiersma, Tjalling"]
[Result "1/2-1/2"]
[ECO "A34"]
[PlyCount "91"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "19"]
[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. Nf3 Nc6 7. d3 e5 8. 0-0 Be7 9. Nd2 Bd7 10. Nc4 0-0 11. Bxc6 Bxc6 12. Nxe5 Be8 13. Be3 Ne6 14. Qb3 Bf6 15. Ng4 Bd4 16. Bxd4 cxd4 17. Ne4 Bc6 18. f4 h5 19. Ne5 Bd5 20. Qa3 Re8 21. Rfc1 h4 22. Qd6 hxg3 23. hxg3 f6 24. Nc4 Re7 25. Qxd8+ Rxd8 26. Kf2 f5 27. Ned2 g5 28. Nf3 gxf4 29. gxf4 Rg7 30. Rg1 Bxc4 31. dxc4 Nxf4 32. Rxg7+ Kxg7 33. Rd1 Ne6 34. b4 b6 35. Rg1+ Kf6 36. Rh1 Kg7 37. Ne5 Rc8 38. a4 Kf6 39. Nd3 Rxc4 40. Rh6+ Ke7 41. Rh7+ Kd6 42. Rxa7 Nc7 43. a5 bxa5 44. Rxa5 Nd5 45. Ra6+ Kc7 46. b5 1/2-1/2

[Event "NED jub25 corr9193"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Neuvonen, Olavi"]
[Black "Wiersma, Tjalling"]
[Result "1-0"]
[ECO "C18"]
[PlyCount "11"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "19"]
[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. Nc3 Bb4 4. e5 c5 5. a3 Ne7 6. axb4 1-0

[Event "NED jub25 corr9193"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Overveld, Ronald"]
[Black "Wiersma, Tjalling"]
[Result "1/2-1/2"]
[ECO "A85"]
[PlyCount "78"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "19"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. c4 f5 2. Nf3 d6 3. d4 Nf6 4. g3 c6 5. Nc3 Qc7 6. Bg5 Nbd7 7. d5 Ne4 8. Nxe4 fxe4 9. Nd2 cxd5 10. cxd5 Qa5 11. Bg2 Qxd5 12. h4 Ne5 13. Bxe4 Qb5 14. Qb3 Qxb3 15. Nxb3 Nc6 16. Rc1 Bd7 17. Be3 e6 18. 0-0 Be7 19. Rfd1 d5 20. Bg2 b6 21. Bg5 Rc8 22. e4 dxe4 23. Bxe4 Bxg5 24. hxg5 Ke7 25. Kg2 h6 26. Rh1 Kd6 27. gxh6 gxh6 28. f4 h5 29. Bf3 h4 30. Rxh4 Rxh4 31. gxh4 Rg8+ 32. Kf2 Rf8 33. Ke3 e5 34. fxe5+ Nxe5 35. Nd2 Nxf3 36. Nxf3 Bg4 37. Ng5 Bh5 38. Rc2 Rf1 39. Rh2 Ke5 1/2-1/2

[Event "NED jub25 corr9193"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Smit, Dick"]
[Black "Wiersma, Tjalling"]
[Result "0-1"]
[ECO "D00"]
[PlyCount "86"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "19"]
[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 d5 3. Bxf6 exf6 4. e3 c6 5. Nd2 Bd6 6. Bd3 f5 7. Qf3 g6 8. Ne2 Nd7 9. c4 Nf6 10. cxd5 cxd5 11. Nc3 Be6 12. Bb5+ Kf8 13. Qe2 Qb6 14. Nb3 Ne4 15. Na4 Qd8 16. 0-0 Kg7 17. Rac1 Qh4 18. g3 Qe7 19. f3 Nf6 20. Nac5 Bc8 21. Rfe1 h5 22. Qf2 a6 23. Bf1 b6 24. Na4 Rb8 25. Bd3 h4 26. gxh4 Bd7 27. Nc3 Rh5 28. Nd2 Rbh8 29. Nf1 Rxh4 30. Rc2 b5 31. a3 Be6 32. b4 Qa7 33. Rec1 Qb8 34. f4 Ng4 35. Qe1 Rh3 36. Nd1 g5 37. Nf2 Nxf2 38. Qxf2 gxf4 39. Re1 R8h6 40. Kh1 f3 41. Rec1 Kh7 42. Rb2 Rg6 43. Qc2 Rh5 0-1

[Event "NED jub25 corr9193"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Soltau, Achim"]
[Black "Wiersma, Tjalling"]
[Result "1-0"]
[ECO "E08"]
[PlyCount "87"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "19"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 Nf6 3. c4 e6 4. g3 Be7 5. Bg2 0-0 6. 0-0 Nbd7 7. Qc2 b6 8. b3 c6 9. Rd1 Bb7 10. Nc3 Ba6 11. Nd2 b5 12. e4 dxe4 13. Ncxe4 Rc8 14. Nxf6+ Nxf6 15. Nf3 Nd7 16. c5 Nf6 17. Bg5 Nd5 18. Bxe7 Qxe7 19. Qd2 Qc7 20. Ng5 Nf6 21. Re1 h6 22. Ne4 Nxe4 23. Rxe4 Rcd8 24. Rae1 Bc8 25. Qc3 a5 26. a3 Bd7 27. h4 Rde8 28. f4 Qd8 29. R4e3 Qf6 30. Qxa5 Qxd4 31. Qc3 Qxc3 32. Rxc3 Re7 33. Rd3 Rc8 34. Red1 Rc7 35. Rd6 f5 36. Kf2 Kf7 37. Ke3 Be8 38. Kd4 Kf6 39. Rd3 Rc8 40. Bf3 g6 41. Kc3 Kf7 42. Re3 Kf6 43. Kb4 Rcc7 44. a4 1-0

[Event "NED jub25 corr9193"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Van Oosterom, Joop J"]
[Black "Wiersma, Tjalling"]
[Result "1-0"]
[ECO "D58"]
[PlyCount "51"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "19"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. Nf3 d5 2. c4 e6 3. d4 Nf6 4. Nc3 Be7 5. Bg5 h6 6. Bh4 0-0 7. e3 b6 8. Bd3 Bb7 9. Bxf6 Bxf6 10. cxd5 exd5 11. 0-0 c5 12. Rc1 Nd7 13. Bf5 cxd4 14. exd4 Nb8 15. Ne5 Bxe5 16. dxe5 Nd7 17. Re1 Nc5 18. Nb5 d4 19. Nd6 Bd5 20. Qxd4 Bxa2 21. Rc3 Qe7 22. b4 Nb7 23. Be4 Nxd6 24. exd6 Qe6 25. Rg3 g6 26. Qd2 1-0

[Event "NED jub25 corr9193"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Weyerstrass, Ronald"]
[Black "Wiersma, Tjalling"]
[Result "1-0"]
[ECO "A34"]
[PlyCount "79"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "19"]
[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 c5 3. Bg2 d5 4. cxd5 Nxd5 5. Nc3 Nc7 6. d3 e5 7. Be3 Nd7 8. Nf3 Be7 9. 0-0 0-0 10. a3 b6 11. Nd2 Rb8 12. Rb1 Bb7 13. Nc4 Bxg2 14. Kxg2 Qc8 15. b4 Qb7+ 16. f3 Nd5 17. Nxd5 Qxd5 18. b5 f5 19. Qb3 Kh8 20. Nd2 Nf6 21. Bg5 Rfd8 22. Bxf6 Bxf6 23. Qxd5 Rxd5 24. Nc4 Rd4 25. Rfc1 Re8 26. a4 Bd8 27. Ra1 h6 28. a5 Re6 29. axb6 Bxb6 30. Ra6 Kh7 31. Nxb6 axb6 32. Rxc5 Rdd6 33. Rc7 Rg6 34. Rb7 h5 35. h3 Kh6 36. Ra8 Kh7 37. Rab8 Rgf6 38. Kf2 Kg6 39. Re8 Rde6 40. Rbe7 1-0

[Event "NED jub25 corr9193"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Boll, Peter Albertus"]
[Result "1/2-1/2"]
[ECO "D35"]
[PlyCount "57"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "19"]
[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 c6 3. Nf3 e6 4. cxd5 exd5 5. Nc3 Nf6 6. Bg5 Be7 7. e3 Bf5 8. Be2 Nbd7 9. a3 a5 10. 0-0 0-0 11. Nd2 h6 12. Bh4 Re8 13. Bg3 Qb6 14. b3 Bf8 15. h3 Rac8 16. Nf3 Bh7 17. Ne5 Nxe5 18. Bxe5 Qd8 19. Bd3 Bxd3 20. Qxd3 Ne4 21. Rfc1 Nxc3 22. Qxc3 Qb6 23. Qb2 Ra8 24. Rc2 Qb5 25. Rd1 Qb6 26. Rc3 Qb5 27. Bg3 Qb6 28. Bf4 Qd8 29. Rcd3 1/2-1/2

[Event "NED jub25 corr9193"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Hovde, Frank"]
[Result "1/2-1/2"]
[ECO "E32"]
[PlyCount "46"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "19"]
[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. Qc2 0-0 5. Bg5 c5 6. e3 h6 7. Bh4 cxd4 8. exd4 Nc6 9. Nf3 Be7 10. Rd1 d5 11. a3 b6 12. Bd3 Bb7 13. Bxf6 Bxf6 14. cxd5 exd5 15. 0-0 Re8 16. Bb5 Qd6 17. Qd3 Re6 18. Ba6 Bxa6 19. Qxa6 Rd8 20. Qd3 g6 21. g3 Qf8 22. Kg2 Qg7 23. h3 Qf8 1/2-1/2

[Event "NED jub25 corr9193"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Quist, Viggo Bove"]
[Result "0-1"]
[ECO "E72"]
[PlyCount "90"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "19"]
[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. g3 e5 6. d5 0-0 7. Bg2 Ne8 8. Nge2 f5 9. 0-0 Nf6 10. f3 a5 11. Be3 Na6 12. h3 h5 13. Bg5 Nc5 14. Nb5 Rf7 15. Nec3 Qf8 16. Qd2 Nh7 17. Be3 f4 18. gxf4 exf4 19. Bd4 g5 20. Kf2 Qe7 21. Rh1 Nf8 22. Rad1 Bxd4+ 23. Nxd4 Ng6 24. Nb3 Nd7 25. Rdg1 Nde5 26. Bf1 c5 27. dxc6 bxc6 28. Nd4 Nh4 29. Be2 Bb7 30. b3 Kh7 31. Rd1 Rd8 32. Rde1 Bc8 33. Bd1 Rg8 34. Reg1 Bb7 35. Rh2 Kh6 36. Re1 Bc8 37. Rg1 Rg6 38. Rhh1 Kg7 39. Na4 c5 40. Nb5 Nhxf3 41. Bxf3 Nxf3 42. Kxf3 g4+ 43. hxg4 hxg4+ 44. Kf2 g3+ 45. Kf1 Qxe4 0-1

[Event "NED jub25 corr9193"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Rittner, Horst Robert"]
[Result "1/2-1/2"]
[ECO "E39"]
[PlyCount "47"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "19"]
[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. Qc2 c5 5. dxc5 0-0 6. a3 Bxc5 7. Nf3 d5 8. cxd5 exd5 9. Bg5 Qb6 10. e3 Ne4 11. Rc1 Nxc3 12. Qxc3 Bd6 13. Bd3 Nc6 14. Bh4 Bg4 15. Bg3 Be7 16. Qc2 h6 17. Ne5 Nxe5 18. Bxe5 Rac8 19. Qd2 Rxc1+ 20. Qxc1 Rc8 21. Qd2 Bf6 22. Bxf6 Qxf6 23. 0-0 Bf5 24. Bxf5 1/2-1/2

[Event "NED jub25 corr9193"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Sarink, Hendrik Bartus"]
[Result "0-1"]
[ECO "E72"]
[PlyCount "82"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "19"]
[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. g3 0-0 6. Bg2 Nbd7 7. Nge2 e5 8. d5 a5 9. 0-0 Nc5 10. f3 Ne8 11. Be3 Bd7 12. b3 f5 13. Qc2 Nf6 14. h3 Nh5 15. Bf2 f4 16. g4 Nf6 17. Nc1 b6 18. Nd3 g5 19. a3 h5 20. b4 Nxd3 21. Qxd3 hxg4 22. hxg4 Qc8 23. Nb5 Nxg4 24. fxg4 Bxg4 25. bxa5 Rxa5 26. Be1 Ra8 27. Bb4 Rf6 28. Ra2 Bd7 29. Be1 g4 30. a4 Rh6 31. a5 bxa5 32. Rxa5 Rxa5 33. Bxa5 Qd8 34. Be1 Qg5 35. Nxc7 Qh5 36. Bg3 f3 37. Bxf3 gxf3 38. Kf2 Bf6 39. Ne6 Bh4 40. Bxh4 Qxh4+ 41. Kxf3 Qh2 0-1

[Event "NED jub25 corr9193"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Seewald, Pieter C"]
[Result "1/2-1/2"]
[ECO "D55"]
[PlyCount "85"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "19"]
[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 d5 4. Bg5 Be7 5. e3 0-0 6. Nf3 Ne4 7. Bxe7 Qxe7 8. Rc1 c6 9. Bd3 Nxc3 10. Rxc3 dxc4 11. Rxc4 Nd7 12. 0-0 e5 13. Qb1 g6 14. h3 f5 15. dxe5 Nxe5 16. Nxe5 Qxe5 17. b4 Be6 18. Rc5 Qd6 19. Bc4 Bxc4 20. Rxc4 Rad8 21. Rd4 Qf6 22. Rfd1 Rxd4 23. Rxd4 Rd8 24. Qb3+ Kf8 25. Rxd8+ Qxd8 26. Qc3 Kf7 27. a3 Ke6 28. Qg7 Qd7 29. Qg8+ Kf6 30. Kh2 Qc7+ 31. f4 Qd7 32. Qh8+ Ke6 33. Qe5+ Kf7 34. Qc3 Qd8 35. Qc5 Qb6 36. Qc4+ Kf6 37. Qc3+ Kf7 38. Qd3 Ke7 39. g4 Qd8 40. Qc3 Kf7 41. gxf5 gxf5 42. Kg3 h5 43. Qc4+ 1/2-1/2

[Event "NED jub25 corr9193"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Staal, Jaap"]
[Result "1/2-1/2"]
[ECO "D82"]
[PlyCount "32"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "19"]
[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 d5 4. Bf4 Bg7 5. e3 c5 6. dxc5 Qa5 7. Qa4+ Qxa4 8. Nxa4 0-0 9. Nc3 dxc4 10. Bxc4 Nbd7 11. Nf3 Nxc5 12. 0-0 Be6 13. Bxe6 Nxe6 14. Be5 Rfd8 15. Rfd1 Nc5 16. Bd4 Nfe4 1/2-1/2

[Event "NED jub25 corr9193"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Temmink, Henk H"]
[Result "1/2-1/2"]
[ECO "A41"]
[PlyCount "36"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "19"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 d6 2. c4 e5 3. d5 f5 4. Nc3 Nf6 5. e4 Nxe4 6. Nxe4 fxe4 7. Ne2 Nd7 8. Ng3 Nc5 9. Be3 Nd3+ 10. Bxd3 exd3 11. Qxd3 Be7 12. 0-0 0-0 13. f4 exf4 14. Bxf4 Bd7 15. Be3 Bf6 16. Bd4 a6 17. Bxf6 Rxf6 18. Qc3 Rxf1+ 1/2-1/2

[Event "NED jub25 corr9193"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Timmerman, Gert Jan"]
[Result "0-1"]
[ECO "E76"]
[PlyCount "50"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "19"]
[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. f4 0-0 6. Nf3 Na6 7. Be2 e5 8. fxe5 dxe5 9. d5 c6 10. 0-0 cxd5 11. cxd5 Qb6+ 12. Kh1 Ne8 13. Na4 Qb4 14. a3 Qxe4 15. Nc3 Qf5 16. Be3 Nd6 17. Nd4 exd4 18. Rxf5 Nxf5 19. Bd2 dxc3 20. Bxc3 Bxc3 21. bxc3 Nc5 22. Rb1 b6 23. Bf3 Ba6 24. g4 Nh4 25. Be2 Ne4 0-1

[Event "NED jub25 corr9193"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Wibe, Terje Paul"]
[Result "1/2-1/2"]
[ECO "A68"]
[PlyCount "104"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "19"]
[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 0-0 5. f4 d6 6. Nf3 c5 7. d5 e6 8. Be2 exd5 9. cxd5 Bg4 10. 0-0 Nbd7 11. h3 Bxf3 12. Bxf3 a6 13. Re1 Re8 14. a4 c4 15. Be3 Qa5 16. Kh1 Nc5 17. Bxc5 Qxc5 18. a5 Re7 19. Re2 Rae8 20. Qc2 Nh5 21. Bxh5 gxh5 22. e5 dxe5 23. Ne4 Qxd5 24. Rd1 Qxa5 25. f5 f6 26. Qxc4+ Kh8 27. Red2 Rf8 28. Rd5 Qb6 29. b4 h4 30. Nc5 Bh6 31. Rd6 Qb5 32. Qxh4 Bg5 33. Qe4 Rg8 34. Ne6 a5 35. bxa5 Qb3 36. Rd8 Ree8 37. R8d3 Qc2 38. Qxb7 Bf4 39. Rd7 Re7 40. Qf3 e4 41. Qf1 Rxd7 42. Rxd7 Bb8 43. Nd8 Rf8 44. Nf7+ Kg8 45. Nh6+ Kh8 46. Ng4 Qc3 47. Qd1 Qxa5 48. Nxf6 Rxf6 49. Rd8+ Kg7 50. Rxb8 Qxf5 51. Rb7+ Kg6 52. Qb3 Qf1+ 1/2-1/2

[Event "Massow mem-A corr8895"]
[Site "corr"]
[Date "1988.??.??"]
[Round "?"]
[White "Engel, Klaus Eberhard"]
[Black "Wiersma, Tjalling"]
[Result "0-1"]
[ECO "A34"]
[PlyCount "52"]
[EventDate "1988.??.??"]
[EventType "tourn (corr)"]
[EventRounds "14"]
[SourceTitle "Corr 2000"]
[Source "ChessBase"]
[SourceDate "2000.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. c4 Nf6 2. Nf3 c5 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Nc6 6. Bg2 Nc7 7. 0-0 e5 8. d3 Be7 9. Nd2 Bd7 10. Nc4 f6 11. f4 b5 12. Ne3 Rc8 13. Ned5 Nxd5 14. Nxd5 0-0 15. fxe5 Nxe5 16. Bf4 Bd6 17. Rc1 Bc6 18. Be3 Kh8 19. Nf4 Bxg2 20. Kxg2 Qe8 21. Bg1 f5 22. e4 Ng6 23. Nxg6+ Qxg6 24. d4 fxe4 25. dxc5 Bf4 26. Rc2 e3 0-1

[Event "Massow mem-A corr8895"]
[Site "corr"]
[Date "1988.??.??"]
[Round "?"]
[White "Gudyev, Mladen"]
[Black "Wiersma, Tjalling"]
[Result "1/2-1/2"]
[ECO "C18"]
[PlyCount "83"]
[EventDate "1988.??.??"]
[EventType "tourn (corr)"]
[EventRounds "14"]
[SourceTitle "Corr 2000"]
[Source "ChessBase"]
[SourceDate "2000.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Qg4 cxd4 8. Qxg7 Rg8 9. Qxh7 Qc7 10. Ne2 dxc3 11. f4 Bd7 12. Qd3 Nf5 13. Rb1 Nc6 14. Qxc3 0-0-0 15. Rg1 d4 16. Qd3 Be8 17. g4 Nh4 18. Rg3 f6 19. exf6 Bg6 20. Qc4 Bf7 21. Bh3 e5 22. g5+ Kb8 23. Be6 Bxe6 24. Qxe6 Rge8 25. Qg4 e4 26. Qxh4 d3 27. c3 dxe2 28. Qg4 Rd1+ 29. Kxe2 Rh1 30. Rg1 Nd4+ 31. cxd4 Rxh2+ 32. Rg2 Qc2+ 33. Kf1 Rh1+ 34. Rg1 Qd3+ 35. Ke1 Qxb1 36. Rxh1 Qxc1+ 37. Qd1 Qxf4 38. Qd2 Qg3+ 39. Qf2 Qxg5 40. Rh7 Qc1+ 41. Ke2 Qc4+ 42. Ke1 1/2-1/2

[Event "Massow mem-A corr8895"]
[Site "corr"]
[Date "1988.??.??"]
[Round "?"]
[White "Hertel, Peter"]
[Black "Wiersma, Tjalling"]
[Result "1/2-1/2"]
[ECO "C05"]
[PlyCount "41"]
[EventDate "1988.??.??"]
[EventType "tourn (corr)"]
[EventRounds "14"]
[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 Nf6 4. e5 Nfd7 5. f4 c5 6. c3 Nc6 7. Ndf3 Qb6 8. g3 Be7 9. Kf2 cxd4 10. cxd4 0-0 11. Kg2 f6 12. Bd3 a5 13. Ne2 Rf7 14. g4 Kh8 15. Bb1 Nf8 16. h4 f5 17. gxf5 exf5 18. Bc2 Be6 19. Nc3 Qd8 20. Be3 Kg8 21. a3 1/2-1/2

[Event "Massow mem-A corr8895"]
[Site "corr"]
[Date "1988.??.??"]
[Round "?"]
[White "Kreuzer, Martin"]
[Black "Wiersma, Tjalling"]
[Result "0-1"]
[ECO "C18"]
[PlyCount "48"]
[EventDate "1988.??.??"]
[EventType "tourn (corr)"]
[EventRounds "14"]
[SourceTitle "Corr 2000"]
[Source "ChessBase"]
[SourceDate "2000.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Qg4 cxd4 8. Qxg7 Rg8 9. Qxh7 Qc7 10. Ne2 dxc3 11. f4 Bd7 12. Nd4 a6 13. Qd3 Nbc6 14. Qxc3 Rc8 15. Bd2 Nxd4 16. Qxd4 Nf5 17. Qb4 d4 18. Bd3 Rxg2 19. Be4 Bc6 20. Bxg2 Bxg2 21. Rg1 Qc6 22. Qb3 Qe4+ 23. Kd1 d3 24. c3 Nd4 0-1

[Event "Massow mem-A corr8895"]
[Site "corr"]
[Date "1988.??.??"]
[Round "?"]
[White "Nesis, Gennady Efimovich"]
[Black "Wiersma, Tjalling"]
[Result "1-0"]
[ECO "E08"]
[PlyCount "74"]
[EventDate "1988.??.??"]
[EventType "tourn (corr)"]
[EventRounds "14"]
[SourceTitle "Corr 2000"]
[Source "ChessBase"]
[SourceDate "2000.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. g3 d5 4. Nf3 Be7 5. Bg2 0-0 6. 0-0 c6 7. Nc3 Nbd7 8. b3 b6 9. Qc2 Ba6 10. Rd1 b5 11. c5 b4 12. Na4 Bb5 13. Nb2 Ne4 14. Nd3 a5 15. Bb2 Qe8 16. a3 bxa3 17. Rxa3 Bd8 18. Nfe5 Nxe5 19. Nxe5 Bc7 20. Bxe4 dxe4 21. Qxe4 f6 22. Nd3 f5 23. Qf3 f4 24. Qe4 Qh5 25. Bc1 fxg3 26. hxg3 Rf6 27. Kg2 Raf8 28. f3 Bxd3 29. Rxd3 Bxg3 30. Kxg3 Rg6+ 31. Kf2 Qh1 32. Qxg6 hxg6 33. Bg5 Qh2+ 34. Kf1 Qh5 35. Be7 Qh1+ 36. Kf2 Rf5 37. Rxa5 e5 1-0

[Event "Massow mem-A corr8895"]
[Site "corr"]
[Date "1988.??.??"]
[Round "?"]
[White "Omelchenko, Lev Evgenyevich"]
[Black "Wiersma, Tjalling"]
[Result "1-0"]
[ECO "C06"]
[PlyCount "21"]
[EventDate "1988.??.??"]
[EventType "tourn (corr)"]
[EventRounds "14"]
[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 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ngf3 f6 8. Ng5 Ndxe5 9. dxe5 fxe5 10. Qh5+ Kd7 11. Nf7 1-0

[Event "Massow mem-A corr8895"]
[Site "corr"]
[Date "1988.??.??"]
[Round "?"]
[White "Pare, Claude"]
[Black "Wiersma, Tjalling"]
[Result "0-1"]
[ECO "C06"]
[PlyCount "88"]
[EventDate "1988.??.??"]
[EventType "tourn (corr)"]
[EventRounds "14"]
[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 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ne2 cxd4 8. cxd4 f6 9. exf6 Nxf6 10. 0-0 Bd6 11. Nf3 Qc7 12. Nc3 a6 13. Re1 0-0 14. h3 Bd7 15. Be3 Rae8 16. Rc1 Qb8 17. a3 Re7 18. Nb1 e5 19. dxe5 Nxe5 20. Nxe5 Rxe5 21. Be2 Rxe3 22. fxe3 Qe8 23. Bf3 Qe5 24. Nc3 Kh8 25. Qd4 Qh2+ 26. Kf2 Ne4+ 27. Nxe4 dxe4 28. Qxe4 Bg3+ 29. Ke2 Bb5+ 30. Rc4 Bxe1 31. Kxe1 Re8 32. Qxe8+ Bxe8 33. Rf4 g6 34. Rf8+ Kg7 35. Rxe8 Qc7 36. Kf2 Kf6 37. Ra8 Qc2+ 38. Kg3 Qxb2 39. Ra7 Qxa3 40. Rxb7 Qxe3 41. Rxh7 a5 42. Rd7 a4 43. Kh2 Ke6 44. Rd3 a3 0-1

[Event "Massow mem-A corr8895"]
[Site "corr"]
[Date "1988.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Bang, Erik BH"]
[Result "1/2-1/2"]
[ECO "E32"]
[PlyCount "51"]
[EventDate "1988.??.??"]
[EventType "tourn (corr)"]
[EventRounds "14"]
[SourceTitle "Corr 2000"]
[Source "ChessBase"]
[SourceDate "2000.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 0-0 5. Bg5 h6 6. Bh4 c5 7. e3 cxd4 8. exd4 Nc6 9. Nf3 Be7 10. a3 d5 11. Rd1 b6 12. Bd3 Bb7 13. Bxf6 Bxf6 14. cxd5 exd5 15. 0-0 Re8 16. Bb5 Qd6 17. Qf5 Rad8 18. Bxc6 Bxc6 19. Rfe1 g6 20. Qd3 Kg7 21. h3 h5 22. Qd2 Rxe1+ 23. Rxe1 Re8 24. Rxe8 Bxe8 25. Qe3 Bc6 26. Ne2 1/2-1/2

[Event "Massow mem-A corr8895"]
[Site "corr"]
[Date "1988.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Berry, Francis Jonathan"]
[Result "1-0"]
[ECO "D31"]
[PlyCount "65"]
[EventDate "1988.??.??"]
[EventType "tourn (corr)"]
[EventRounds "14"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 e6 4. cxd5 exd5 5. Nc3 Bf5 6. Bf4 Bd6 7. Bxd6 Qxd6 8. e3 Nd7 9. Be2 Ne7 10. 0-0 0-0 11. a3 a5 12. Nh4 Be4 13. f3 Bg6 14. e4 dxe4 15. fxe4 Rad8 16. Nxg6 Nxg6 17. Kh1 b5 18. e5 Qe6 19. Bg4 Qc4 20. Be2 Qe6 21. Bg4 Qc4 22. Ne2 c5 23. Rc1 Qa2 24. Bxd7 Rxd7 25. Rxc5 Qxb2 26. Rf3 Qa2 27. Rxb5 a4 28. h3 h5 29. Re3 Rc8 30. Qd3 Ne7 31. Qe4 g6 32. e6 Qxe6 33. Re5 1-0

[Event "Massow mem-A corr8895"]
[Site "corr"]
[Date "1988.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Herbrechtsmeier, Christof"]
[Result "1/2-1/2"]
[ECO "E32"]
[PlyCount "126"]
[EventDate "1988.??.??"]
[EventType "tourn (corr)"]
[EventRounds "14"]
[SourceTitle "Corr 2000"]
[Source "ChessBase"]
[SourceDate "2000.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 0-0 5. Bg5 c5 6. e3 cxd4 7. exd4 h6 8. Bh4 d5 9. Nf3 Nc6 10. Rd1 Be7 11. a3 b6 12. Bd3 dxc4 13. Bxc4 Bb7 14. Ba2 Nd5 15. Nxd5 exd5 16. Bg3 Bf6 17. 0-0 Re8 18. Bb1 g6 19. Qd2 h5 20. Rfe1 Rxe1+ 21. Rxe1 Qf8 22. Ba2 Rd8 23. Qf4 Kg7 24. Qe3 Qe7 25. Qd2 Qd7 26. h3 Re8 27. Ne5 Qd8 28. Qd3 Ne7 29. Bf4 Nf5 30. Bd2 Bg5 31. Bb1 Bc8 32. Rc1 Bxd2 33. Qxd2 Be6 34. Qf4 Qf6 35. Bxf5 Bxf5 36. Rc6 Be6 37. Qxf6+ Kxf6 38. f3 h4 39. Kf2 g5 40. b4 b5 41. Ra6 Rc8 42. Nd7+ Kf5 43. Nc5 Rc7 44. Rd6 Rc8 45. Ke3 Re8 46. Ke2 Rc8 47. Kf2 Rc7 48. g4+ hxg3+ 49. Kxg3 Rc8 50. Ra6 Rh8 51. Rxa7 Kf6 52. Nxe6 fxe6 53. Ra5 Rb8 54. Kg4 Kg6 55. f4 gxf4 56. Kxf4 Kf6 57. h4 Rh8 58. Kg4 Rg8+ 59. Kf3 Rc8 60. h5 Kg5 61. Rxb5 Rc3+ 62. Ke2 Rxa3 63. Rb8 Kxh5 1/2-1/2

[Event "Massow mem-A corr8895"]
[Site "corr"]
[Date "1988.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Metz, Werner Richard"]
[Result "1-0"]
[ECO "A68"]
[PlyCount "119"]
[EventDate "1988.??.??"]
[EventType "tourn (corr)"]
[EventRounds "14"]
[SourceTitle "Corr 2000"]
[Source "ChessBase"]
[SourceDate "2000.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 0-0 6. Nf3 c5 7. d5 e6 8. Be2 exd5 9. cxd5 Bg4 10. 0-0 Nbd7 11. h3 Bxf3 12. Bxf3 a6 13. Re1 Ne8 14. a4 Rb8 15. a5 b5 16. axb6 Rxb6 17. Ra2 Nc7 18. Bd2 Qc8 19. Na4 Rb8 20. Bc3 Nb5 21. Bxg7 Kxg7 22. Nc3 Nd4 23. Bg4 f5 24. exf5 gxf5 25. Be2 Qd8 26. Bxa6 Qh4 27. Rf1 Kh8 28. Ne2 Rb4 29. b3 Nxb3 30. Rb2 Rfb8 31. Bc4 Rxc4 32. Rxb3 Rxb3 33. Qxb3 Re4 34. Qf3 Re7 35. Ng3 Qf6 36. Qd3 Rf7 37. Re1 Nf8 38. Kh2 h6 39. Re8 Kh7 40. Nh5 Qd4 41. Qg3 c4 42. Rd8 c3 43. Rc8 c2 44. Rxc2 Qxd5 45. Rc8 Qb7 46. Rc3 Ne6 47. Rd3 Qd7 48. Qe3 Ng7 49. Nxg7 Kxg7 50. Qd4+ Kh7 51. Ra3 Qe6 52. Re3 Qd7 53. Qd5 Rf6 54. Qa8 Re6 55. Rb3 Re7 56. Rb8 Qe6 57. Rh8+ Kg6 58. Qf8 Rg7 59. h4 Qd7 60. g4 1-0

[Event "Massow mem-A corr8895"]
[Site "corr"]
[Date "1988.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Morgado, Juan Sebastian"]
[Result "1-0"]
[ECO "D59"]
[PlyCount "59"]
[EventDate "1988.??.??"]
[EventType "tourn (corr)"]
[EventRounds "14"]
[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 d5 4. Bg5 Be7 5. Nf3 h6 6. Bh4 0-0 7. e3 b6 8. Be2 Bb7 9. cxd5 Nxd5 10. Bxe7 Qxe7 11. Nxd5 Bxd5 12. 0-0 Nd7 13. Rc1 c5 14. a3 Rfd8 15. Qc2 Bb7 16. Rfd1 Rac8 17. Qb1 cxd4 18. Rxc8 Rxc8 19. Nxd4 a6 20. b4 Nf6 21. Rc1 Qd7 22. h3 Ne4 23. Rxc8+ Qxc8 24. Bxa6 Bxa6 25. Qxe4 Bb7 26. Qd3 Qa8 27. f3 e5 28. Nf5 h5 29. Ne7+ Kf8 30. Qd6 1-0

[Event "Massow mem-A corr8895"]
[Site "corr"]
[Date "1988.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Oim, Tonu O"]
[Result "0-1"]
[ECO "E39"]
[PlyCount "61"]
[EventDate "1988.??.??"]
[EventType "tourn (corr)"]
[EventRounds "14"]
[SourceTitle "Corr 2000"]
[Source "ChessBase"]
[SourceDate "2000.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 0-0 6. a3 Bxc5 7. Nf3 d5 8. cxd5 exd5 9. Bg5 Qb6 10. e3 Ne4 11. Rc1 Bd6 12. Nxe4 dxe4 13. Nd2 Bf5 14. Nc4 Qc7 15. g4 Bg6 16. h4 h6 17. Nxd6 Qxd6 18. Bf4 Qb6 19. Bc4 Nc6 20. h5 Bh7 21. Rg1 Kh8 22. g5 hxg5 23. Rxg5 f6 24. Rb5 Qd8 25. Qc3 Qe7 26. Qb3 b6 27. Qc3 Ne5 28. Bxe5 fxe5 29. Qxe5 Qh4 30. Qg3 Qf6 31. Rd1 0-1

[Event "Massow mem-A corr8895"]
[Site "corr"]
[Date "1988.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Richardson, Keith B"]
[Result "0-1"]
[ECO "E72"]
[PlyCount "100"]
[EventDate "1988.??.??"]
[EventType "tourn (corr)"]
[EventRounds "14"]
[SourceTitle "Corr 2000"]
[Source "ChessBase"]
[SourceDate "2000.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 0-0 5. g3 d6 6. Bg2 e5 7. d5 Nh5 8. Nge2 f5 9. exf5 gxf5 10. f4 exf4 11. Bxf4 Nxf4 12. Nxf4 Re8+ 13. Kf2 Na6 14. Bf3 Nc5 15. Kg2 Bd7 16. Re1 Qg5 17. Qd2 a5 18. Rxe8+ Rxe8 19. Re1 Be5 20. Nce2 a4 21. Nd4 Bxf4 22. Rxe8+ Bxe8 23. Qxf4 Qxf4 24. gxf4 Nd3 25. b3 a3 26. Nc2 Nxf4+ 27. Kg3 Nd3 28. Nxa3 Kg7 29. Nc2 Kf6 30. Nd4 Ke5 31. Ne6 f4+ 32. Kg2 c5 33. Nd8 Nc1 34. Nxb7 Nxa2 35. Kf2 Nc1 36. Na5 Bg6 37. Ke1 Nd3+ 38. Kd2 Kf6 39. Nc6 Ne5 40. Bh1 Ng4 41. h4 Ne3 42. Bf3 h5 43. Ke2 Nf5 44. b4 cxb4 45. Nxb4 Nxh4 46. Nc6 Nf5 47. Kf2 h4 48. Nd8 Nd4 49. Nc6 Nxf3 50. Kxf3 h3 0-1

[Event "EU-chT3 corr8392"]
[Site "ICCF corr"]
[Date "1983.??.??"]
[Round "?"]
[White "Ljublinsky, Victor A"]
[Black "Wiersma, Tjalling"]
[Result "1/2-1/2"]
[ECO "C17"]
[PlyCount "76"]
[EventDate "1983.??.??"]
[EventType "team (corr)"]
[EventRounds "11"]
[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. Nc3 Bb4 4. e5 c5 5. Bd2 Ne7 6. Nb5 Bxd2+ 7. Qxd2 0-0 8. dxc5 Nd7 9. Nf3 Nxc5 10. Bd3 Nxd3+ 11. cxd3 Bd7 12. Nbd4 Qb6 13. 0-0 Ng6 14. Nb3 Ba4 15. Nc1 f6 16. b3 Bd7 17. exf6 Rxf6 18. Qe3 Qd6 19. d4 Bb5 20. Re1 Raf8 21. a4 Ba6 22. Ra2 Ne7 23. Ne5 Rc8 24. Qd2 Nf5 25. b4 Bc4 26. Rc2 Rc7 27. a5 Rf8 28. g3 Rfc8 29. Nf3 Qe7 30. Nd3 Bxd3 31. Rxc7 Qxc7 32. Qxd3 Qc3 33. Qxc3 Rxc3 34. Kg2 Rc4 35. Rxe6 Nxd4 36. Rd6 Nxf3 37. Kxf3 Rxb4 38. Rxd5 Kf7 1/2-1/2

[Event "EU-chT3 corr8392"]
[Site "ICCF corr"]
[Date "1983.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Mayr, Franz"]
[Result "1-0"]
[ECO "E39"]
[PlyCount "67"]
[EventDate "1983.??.??"]
[EventType "team (corr)"]
[EventRounds "11"]
[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. Qc2 c5 5. dxc5 0-0 6. a3 Bxc5 7. Nf3 Nc6 8. Bg5 Nd4 9. Nxd4 Bxd4 10. e3 Qa5 11. exd4 Qxg5 12. g3 d5 13. f4 Qh5 14. Be2 Qh3 15. c5 Bd7 16. Bf1 Qh5 17. Bg2 b6 18. 0-0 bxc5 19. dxc5 Rac8 20. b4 Qg6 21. Qxg6 hxg6 22. Rfc1 Rc7 23. Ne2 Bb5 24. Nd4 Bc4 25. c6 Ne8 26. b5 Nd6 27. a4 Nf5 28. Nxf5 gxf5 29. Kf2 Rb8 30. Ke3 Kf8 31. Kd4 Ke7 32. Rab1 Kd6 33. Rxc4 dxc4 34. Kxc4 1-0

[Event "Volmac-A corr8286"]
[Site "Netherlands"]
[Date "1982.??.??"]
[Round "?"]
[White "Bergraser, Volf"]
[Black "Wiersma, Tjalling"]
[Result "0-1"]
[ECO "D58"]
[PlyCount "76"]
[EventDate "1982.??.??"]
[EventType "tourn (corr)"]
[EventRounds "14"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. Nc3 Be7 5. Bg5 h6 6. Bh4 0-0 7. Rc1 b6 8. cxd5 exd5 9. e3 Be6 10. Bd3 Nbd7 11. Ne5 Nxe5 12. dxe5 Ng4 13. Bxe7 Qxe7 14. Be2 Nxe5 15. Nxd5 Bxd5 16. Qxd5 Rad8 17. Qb3 c5 18. Qc3 Nc6 19. 0-0 Rd6 20. Rfd1 Rfd8 21. Rxd6 Qxd6 22. h3 Qd2 23. Kf1 Qxc3 24. bxc3 Rd2 25. a4 Kf8 26. Rd1 Rxd1+ 27. Bxd1 c4 28. Be2 Na5 29. e4 Ke7 30. f4 Nb3 31. Kf2 Nc5 32. Ke3 Nxa4 33. Kd4 b5 34. e5 a5 35. Bd1 Nb2 36. Bc2 a4 37. Kc5 a3 38. Bb1 Nd1 0-1

[Event "Volmac-A corr8286"]
[Site "Netherlands"]
[Date "1982.??.??"]
[Round "?"]
[White "Berta, Matyas"]
[Black "Wiersma, Tjalling"]
[Result "0-1"]
[ECO "C17"]
[PlyCount "78"]
[EventDate "1982.??.??"]
[EventType "tourn (corr)"]
[EventRounds "14"]
[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. Nc3 Bb4 4. e5 c5 5. Bd2 Ne7 6. Nf3 cxd4 7. Nb5 Bxd2+ 8. Qxd2 0-0 9. Nbxd4 Nbc6 10. Bd3 f6 11. exf6 Rxf6 12. Nxc6 Nxc6 13. 0-0-0 Qb6 14. Rhe1 Bd7 15. c3 Raf8 16. Bc2 Be8 17. Nh4 Rh6 18. Nf3 Bh5 19. Re3 Bxf3 20. gxf3 Qc7 21. Rh1 Qf4 22. h4 Ne5 23. Rh3 Nc4 24. Qd4 Qxd4 25. cxd4 Rf4 26. Re1 Rxd4 27. Bd1 Kf7 28. b3 Nd6 29. h5 Kf6 30. Rg1 Nf5 31. Bc2 Rf4 32. Kd2 Nd4 33. Ke3 e5 34. Bd3 g6 35. Rg4 Rxh5 36. Rxh5 Rxf3+ 37. Kd2 gxh5 38. Rg2 e4 39. Bf1 h4 0-1

[Event "Volmac-A corr8286"]
[Site "Netherlands"]
[Date "1982.??.??"]
[Round "?"]
[White "Bouwmeester, Hans"]
[Black "Wiersma, Tjalling"]
[Result "1/2-1/2"]
[ECO "D58"]
[PlyCount "76"]
[EventDate "1982.??.??"]
[EventType "tourn (corr)"]
[EventRounds "14"]
[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 d5 4. Bg5 Be7 5. Nf3 0-0 6. e3 h6 7. Bh4 b6 8. Rc1 Bb7 9. Bxf6 Bxf6 10. cxd5 exd5 11. Be2 Nd7 12. 0-0 c6 13. b4 a5 14. bxa5 Rxa5 15. a4 Be7 16. Qb3 Kh8 17. Bd3 Bd6 18. g3 Nf6 19. Rb1 Bc7 20. Rfc1 Re8 21. Nd2 Bc8 22. Qc2 Bd7 23. Bf5 Bxf5 24. Qxf5 Bd6 25. Rb3 g6 26. Qb1 Ra6 27. Qd3 Ra5 28. Rcb1 Bc7 29. Qc2 Kg7 30. R3b2 h5 31. Ne2 Qd7 32. h4 Rea8 33. Kg2 Rxa4 34. Rc1 c5 35. dxc5 bxc5 36. Qxc5 Ra2 37. Qc2 R2a7 38. Nd4 Bd6 1/2-1/2

[Event "Volmac-A corr8286"]
[Site "Netherlands"]
[Date "1982.??.??"]
[Round "?"]
[White "Planta, Rudi Johannes"]
[Black "Wiersma, Tjalling"]
[Result "1/2-1/2"]
[ECO "C08"]
[PlyCount "139"]
[EventDate "1982.??.??"]
[EventType "tourn (corr)"]
[EventRounds "14"]
[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 exd5 5. Bb5+ Bd7 6. Qe2+ Qe7 7. Bxd7+ Nxd7 8. dxc5 Nxc5 9. Nb3 Qxe2+ 10. Nxe2 Ne6 11. Be3 Nf6 12. Rd1 b6 13. 0-0 Bc5 14. Ned4 Nxd4 15. Bxd4 Bxd4 16. Nxd4 0-0-0 17. f3 Rd7 18. Rd3 Kb7 19. Re1 Re8 20. Rde3 Rxe3 21. Rxe3 g6 22. Kf2 Kc7 23. Rc3+ Kb7 24. Re3 Kc7 25. Ke2 a6 26. Kd2 Kb7 27. b4 Rd8 28. Re7+ Rd7 29. Re3 Rd8 30. g4 h6 31. h4 Re8 32. Rxe8 Nxe8 33. Ke3 Kc7 34. f4 Kd6 35. Nf3 Ke6 36. f5+ gxf5 37. Nd4+ Kf6 38. Nxf5 h5 39. Kf4 hxg4 40. Ne3 d4 41. Nxg4+ Ke6 42. h5 f6 43. h6 Kf7 44. Ke4 Kg6 45. Kxd4 f5 46. Ne3 Nf6 47. Nd5 Nxd5 48. Kxd5 Kxh6 49. c4 f4 50. Ke4 Kg5 51. a4 Kg4 52. c5 bxc5 53. bxc5 f3 54. c6 f2 55. c7 f1Q 56. c8Q+ Kg5 57. Qg8+ Kh6 58. Qh8+ Kg6 59. Qe8+ Kg5 60. Kd4 Qf6+ 61. Kc5 Kf5 62. Qd7+ Qe6 63. Qh7+ Kf6 64. Qh4+ Kf7 65. Qd4 Ke7 66. Qd3 Qc8+ 67. Kb4 Qb8+ 68. Ka5 Qd8+ 69. Qxd8+ Kxd8 70. Kxa6 1/2-1/2

[Event "Volmac-A corr8286"]
[Site "Netherlands"]
[Date "1982.??.??"]
[Round "?"]
[White "Quist, Viggo Bove"]
[Black "Wiersma, Tjalling"]
[Result "0-1"]
[ECO "A34"]
[PlyCount "102"]
[EventDate "1982.??.??"]
[EventType "tourn (corr)"]
[EventRounds "14"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. c4 Nf6 2. Nf3 c5 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nc6 6. Nc3 Nc7 7. d3 e5 8. 0-0 Be7 9. Nd2 Bd7 10. Nc4 f6 11. a4 0-0 12. f4 exf4 13. Bxf4 Be6 14. a5 Nd5 15. Bd2 Rb8 16. Rf2 f5 17. Nxd5 Bxd5 18. Ne3 Bxg2 19. Kxg2 Nd4 20. Bc3 f4 21. Rxf4 Rxf4 22. gxf4 Qd6 23. Ng4 Qg6 24. e3 h5 25. exd4 cxd4 26. Bxd4 Rd8 27. Ra4 hxg4 28. Qb3+ Kf8 29. Qc3 Qh7 30. Kg1 Qh3 31. Bxg7+ Kg8 32. Re4 g3 33. Qc4+ Kh7 34. Re2 Rg8 35. Qe4+ Kxg7 36. hxg3 Re8 37. d4 Bf6 38. Qxb7+ Kg6 39. Qg2 Bxd4+ 40. Kf1 Qxg2+ 41. Rxg2 Kf5 42. Rd2 Ke4 43. Re2+ Be3 44. Kg2 Rb8 45. f5 Rf8 46. g4 Kf4 47. b4 Rg8 48. Kh3 Kf3 49. Rxe3+ Kxe3 50. Kh4 Kf4 51. Kh5 Ke5 0-1

[Event "Volmac-A corr8286"]
[Site "Netherlands"]
[Date "1982.??.??"]
[Round "?"]
[White "Richardson, Keith B"]
[Black "Wiersma, Tjalling"]
[Result "0-1"]
[ECO "C19"]
[PlyCount "72"]
[EventDate "1982.??.??"]
[EventType "tourn (corr)"]
[EventRounds "14"]
[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. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Nf3 Qa5 8. Bd2 Bd7 9. Be2 c4 10. 0-0 Ba4 11. Ng5 h6 12. Nh3 Nd7 13. Nf4 0-0 14. Bg4 Qa6 15. Re1 Ng6 16. Nh5 Rae8 17. Qc1 Kh7 18. Re3 Rh8 19. Rg3 Re7 20. f4 Ndf8 21. Rh3 Bd7 22. Bf3 Kg8 23. g4 Qb6 24. Rb1 Qc7 25. Qf1 Qc8 26. Qf2 Nh7 27. Rf1 Re8 28. f5 exf5 29. Bxd5 Ng5 30. Bxg5 hxg5 31. gxf5 Nh4 32. Rxh4 gxh4 33. Qxh4 Bxf5 34. Qg5 Rxh5 35. Qxh5 g6 36. Qh6 Qd8 0-1

[Event "Volmac-A corr8286"]
[Site "Netherlands"]
[Date "1982.??.??"]
[Round "?"]
[White "Timmerman, Gert Jan"]
[Black "Wiersma, Tjalling"]
[Result "0-1"]
[ECO "C18"]
[PlyCount "118"]
[EventDate "1982.??.??"]
[EventType "tourn (corr)"]
[EventRounds "14"]
[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. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Qg4 cxd4 8. Qxg7 Rg8 9. Qxh7 Qc7 10. Ne2 dxc3 11. f4 Bd7 12. Nd4 a6 13. Qd3 Nbc6 14. Nxc6 Bxc6 15. h3 d4 16. Rg1 0-0-0 17. g4 Qb6 18. Qg3 Rh8 19. Qf2 Ng6 20. Rg3 Nh4 21. Be2 Qc5 22. Rb1 Qd5 23. Kd1 Qh1+ 24. Bf1 Bf3+ 25. Ke1 d3 26. cxd3 Rxd3 27. Qc5+ Kb8 28. Qg1 Rd1+ 29. Kf2 Qxg1+ 30. Rxg1 c2 31. Ra1 Be4 32. Rg3 Nf3 33. Be2 Nd2 34. Rc3 Rc8 35. Rxc2 Bxc2 36. Bxd1 Nb3 37. Ra2 Bxd1 38. Be3 Nc5 39. Bxc5 Rxc5 40. Kg3 Rc3+ 41. Kh4 Rf3 42. Rd2 Bb3 43. Kg5 Rxh3 44. Rd7 Rh7 45. Kf6 Rh6+ 46. Ke7 Rh4 47. Rd8+ Kc7 48. Rd3 Bc4 49. Rd4 Be2 50. g5 Bh5 51. Rd7+ Kc6 52. Rd6+ Kc5 53. f5 exf5 54. Rh6 Kd5 55. Kf6 f4 56. e6 fxe6 57. g6 f3 58. g7 Rf4+ 59. Kg5 Rf5+ 0-1

[Event "Volmac-A corr8286"]
[Site "Netherlands"]
[Date "1982.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Backlund, Bror Ake"]
[Result "1-0"]
[ECO "E72"]
[PlyCount "43"]
[EventDate "1982.??.??"]
[EventType "tourn (corr)"]
[EventRounds "14"]
[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. g3 0-0 6. Bg2 c5 7. d5 Na6 8. Nge2 Nc7 9. 0-0 b5 10. cxb5 Rb8 11. a4 a6 12. Qb3 Nd7 13. Bg5 axb5 14. axb5 Ba6 15. Qc2 Bxb5 16. Nxb5 Nxb5 17. Bd2 Bxb2 18. Ba5 Nc7 19. Rab1 Bg7 20. Qa4 Qc8 21. Bh3 e6 22. Qc6 1-0

[Event "Volmac-A corr8286"]
[Site "Netherlands"]
[Date "1982.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Boyd, Frank"]
[Result "1/2-1/2"]
[ECO "E32"]
[PlyCount "71"]
[EventDate "1982.??.??"]
[EventType "tourn (corr)"]
[EventRounds "14"]
[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. Qc2 0-0 5. Bg5 h6 6. Bh4 c5 7. e3 cxd4 8. exd4 Nc6 9. Nf3 Be7 10. a3 d5 11. Rd1 b6 12. Bd3 dxc4 13. Bxc4 Na5 14. Ba2 Bb7 15. Ne5 Rc8 16. Bxf6 Bxf6 17. Bb1 Re8 18. 0-0 Nc4 19. Qh7+ Kf8 20. Nxc4 Rxc4 21. Bd3 Rxd4 22. Bb5 Ke7 23. Bxe8 Qxe8 24. Qc2 Qc6 25. f3 Rh4 26. Qd3 Bd4+ 27. Kh1 Qc7 28. f4 Bxc3 29. bxc3 g5 30. Qg3 Rxf4 31. Rxf4 gxf4 32. Qh4+ Ke8 33. Qxh6 f3 34. Qh8+ Ke7 35. Qh4+ Ke8 36. Qh8+ 1/2-1/2

[Event "olm10 corr8291"]
[Site "ICCF corr"]
[Date "1982.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Brzozka, Stefan"]
[Result "0-1"]
[ECO "E72"]
[PlyCount "96"]
[EventDate "1982.??.??"]
[EventType "team (corr)"]
[EventRounds "9"]
[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. g3 0-0 6. Bg2 e5 7. d5 Ne8 8. Nge2 f5 9. 0-0 Nf6 10. f3 c5 11. Bd2 Na6 12. a3 Bd7 13. Nb5 Qb6 14. Nec3 Ne8 15. exf5 gxf5 16. f4 e4 17. g4 Nb8 18. a4 a6 19. a5 Qd8 20. Na3 e3 21. Bxe3 fxg4 22. Qb3 Bf5 23. Ne4 Bxe4 24. Bxe4 Nd7 25. Bd2 Bd4+ 26. Kh1 Nef6 27. Bg2 Nh5 28. Nc2 Bg7 29. Qe3 Kh8 30. Rab1 Bh6 31. Bc3+ Ng7 32. b4 Re8 33. Qd3 cxb4 34. Bxg7+ Bxg7 35. Nd4 Qxa5 36. Ne6 Bc3 37. Qf5 Nf6 38. Rbe1 Re7 39. Re3 Rf7 40. Ng5 Qc7 41. c5 Rff8 42. Ne6 Qc8 43. cxd6 a5 44. Qg5 Rf7 45. Nc7 Rb8 46. Rc1 Qd7 47. Re6 Rg8 48. Qh4 a4 0-1

[Event "Volmac-A corr8286"]
[Site "Netherlands"]
[Date "1982.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Marcussi, Bartolome Jorge"]
[Result "1-0"]
[ECO "A75"]
[PlyCount "61"]
[EventDate "1982.??.??"]
[EventType "tourn (corr)"]
[EventRounds "14"]
[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 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 0-0 9. 0-0 a6 10. a4 Bg4 11. Bf4 Re8 12. Qc2 Qc7 13. h3 Bxf3 14. Bxf3 Nbd7 15. Rfe1 c4 16. Be2 Rab8 17. Rac1 b5 18. axb5 axb5 19. b4 cxb3 20. Qxb3 Nc5 21. Qb1 b4 22. Nb5 Qb6 23. Nxd6 Ncxe4 24. Nxe4 Nxe4 25. Bxb8 Nc3 26. Qb3 Rxe2 27. Bg3 Bd4 28. Kh1 Rd2 29. Bf4 Rxf2 30. Bh6 Qb5 31. Qc4 1-0

[Event "Volmac-A corr8286"]
[Site "Netherlands"]
[Date "1982.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Rittner, Horst Robert"]
[Result "0-1"]
[ECO "E39"]
[PlyCount "102"]
[EventDate "1982.??.??"]
[EventType "tourn (corr)"]
[EventRounds "14"]
[EventCountry "NED"]
[SourceTitle "Myers"]
[Source "Myers"]
[SourceDate "2012.11.12"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.12"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 0-0 6. a3 Bxc5 7. Nf3 Nc6 8. Bg5 Nd4 9. Nxd4 Bxd4 10. e3 Qa5 11. exd4 Qxg5 12. g3 d5 13. f4 Qh6 14. c5 Bd7 15. Bg2 a5 16. b3 Rfc8 17. Qd2 b6 18. cxb6 Rab8 19. Na4 Bxa4 20. bxa4 Rxb6 21. 0-0 Rcb8 22. Rac1 g6 23. Rc5 Rb2 24. Qd3 Ne4 25. Rb5 Nd6 26. Rxb8+ Rxb8 27. Rc1 Qg7 28. Bf1 Nf5 29. Rd1 h5 30. Qc3 Qf8 31. Rc1 Qd8 32. Bd3 Nd6 33. Rb1 Rc8 34. Qe1 Qf6 35. Qe5 Kg7 36. Rb3 Rc1+ 37. Kf2 Nc4 38. Qxf6+ Kxf6 39. h3 Rd1 40. g4 Rd2+ 41. Kf3 Nb2 42. Bb5 Nc4 43. Bxc4 dxc4 44. Rb5 Rd3+ 45. Ke4 Rxh3 46. gxh5 Rxh5 47. Rb6 c3 48. Rc6 Rh4 49. Ke3 Rh3+ 50. Ke4 g5 51. Rd6 Ke7 0-1

[Event "Volmac-A corr8286"]
[Site "Netherlands"]
[Date "1982.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Sorri, Kari Juhani"]
[Result "1/2-1/2"]
[ECO "D14"]
[PlyCount "85"]
[EventDate "1982.??.??"]
[EventType "tourn (corr)"]
[EventRounds "14"]
[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 c6 3. Nf3 Nf6 4. cxd5 cxd5 5. Nc3 Nc6 6. Bf4 Bf5 7. e3 e6 8. Bb5 Nd7 9. Qa4 Rc8 10. 0-0 a6 11. Bxc6 Rxc6 12. Rfc1 Be7 13. Ne2 Qb6 14. Rxc6 bxc6 15. Rc1 Bd3 16. Qd1 Bxe2 17. Qxe2 0-0 18. h3 c5 19. dxc5 Bxc5 20. Ne5 Nxe5 21. Bxe5 f6 22. Bc7 Qxc7 23. b4 Qd6 24. bxc5 Qc6 25. Qb2 Rc8 26. Rc3 Kf7 27. f4 Rc7 28. Qb1 h6 29. Kf2 a5 30. Qc2 Rb7 31. Rb3 Rb4 32. Rxb4 axb4 33. g4 g6 34. h4 e5 35. fxe5 fxe5 36. g5 hxg5 37. hxg5 Qc7 38. Kg2 Qe7 39. c6 Qxg5+ 40. Kf1 Ke8 41. c7 Qf6+ 42. Kg1 Qg5+ 43. Kf1 1/2-1/2

[Event "Volmac-A corr8286"]
[Site "Netherlands"]
[Date "1982.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Van Oosterom, Joop J"]
[Result "1-0"]
[ECO "D58"]
[PlyCount "115"]
[EventDate "1982.??.??"]
[EventType "tourn (corr)"]
[EventRounds "14"]
[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 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 0-0 7. e3 b6 8. Be2 Bb7 9. Bxf6 Bxf6 10. cxd5 exd5 11. 0-0 Qe7 12. Qb3 c6 13. Rad1 Bc8 14. Rfe1 Be6 15. Qc2 c5 16. e4 cxd4 17. Nxd5 Bxd5 18. exd5 Nd7 19. Bb5 Qc5 20. Qxc5 Nxc5 21. b4 Nb7 22. Bc6 Rab8 23. Nxd4 Nd6 24. Nb5 Rbd8 25. Nxd6 Rxd6 26. b5 Rc8 27. g3 Kf8 28. Rd3 Be7 29. Re4 Rdd8 30. Ra4 Rc7 31. Re3 Bc5 32. Ree4 g5 33. Kg2 Kg7 34. h4 Kf6 35. f3 Rg8 36. h5 Rf8 37. Ra6 Rd8 38. Kh3 Bd6 39. a4 Bc5 40. Kg4 Rg8 41. a5 Rd8 42. Re2 bxa5 43. Rxa5 Re7 44. Rxe7 Kxe7 45. Kf5 Rd6 46. Ra4 Rf6+ 47. Kg4 Kd6 48. Re4 Kc7 49. Re8 Bd6 50. Ra8 Bc5 51. Rg8 Bd6 52. Be8 Kb6 53. Rg7 Kc5 54. Bxf7 Kxb5 55. Rg6 Be7 56. Rxf6 Bxf6 57. Kf5 Bd8 58. g4 1-0

[Event "Volmac-A corr8286"]
[Site "Netherlands"]
[Date "1982.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Van Perlo, Gerardus C"]
[Result "0-1"]
[ECO "E72"]
[PlyCount "112"]
[EventDate "1982.??.??"]
[EventType "tourn (corr)"]
[EventRounds "14"]
[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. g3 0-0 6. Bg2 e5 7. d5 a5 8. Nge2 Na6 9. 0-0 Nc5 10. f3 c6 11. Be3 cxd5 12. cxd5 Bd7 13. a4 Qb6 14. Kh1 Qb4 15. Rf2 Nb3 16. Ra3 Nd4 17. Nc1 Nh5 18. Rd2 f5 19. Nb3 f4 20. Bxd4 exd4 21. Na2 Qb6 22. g4 Ng3+ 23. hxg3 fxg3 24. Nxd4 Bxd4 25. Rxd4 Qxb2 26. Rad3 Qxa2 27. Rd2 Qa3 28. R2d3 Qc5 29. Qe1 b5 30. axb5 Bxb5 31. Rd1 a4 32. R4d2 Qc3 33. Qxg3 Bc4 34. Qe1 Qe5 35. Ra1 Bb3 36. Rf2 Rac8 37. Rc1 g5 38. Rxc8 Rxc8 39. Qa5 Qc3 40. Qa7 Qc7 41. Qa6 Qc5 42. Qb7 Rf8 43. Rf1 Rf7 44. Qb8+ Kg7 45. e5 Qxd5 46. exd6 Rd7 47. Rc1 Qxd6 48. Qb5 h6 49. f4 gxf4 50. g5 Bd5 51. Qb2+ Kf7 52. g6+ Kxg6 53. Rf1 a3 54. Qc2+ Kg7 55. Rg1 Kf6 56. Rf1 Qe5 0-1

[Event "EU-chT1 fin 03 corr"]
[Site "ICCF corr"]
[Date "1978.??.??"]
[Round "?"]
[White "De Carbonnel, Heinz"]
[Black "Wiersma, Tjalling"]
[Result "1-0"]
[ECO "A60"]
[PlyCount "77"]
[EventDate "1978.??.??"]
[EventType "team (corr)"]
[EventRounds "8"]
[SourceTitle "Myers"]
[Source "Myers"]
[SourceDate "2012.11.12"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.12"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. g3 c5 4. d5 exd5 5. cxd5 b5 6. e4 Qe7 7. Bg2 d6 8. Ne2 g6 9. 0-0 Bg7 10. e5 Qxe5 11. Nec3 0-0 12. Nxb5 Qe7 13. N1c3 Ba6 14. Re1 Qd8 15. a4 Bxb5 16. Nxb5 Ne8 17. Bf4 a6 18. Rxe8 Rxe8 19. Nxd6 Rf8 20. Nc4 Nd7 21. a5 Bd4 22. Qc2 Qf6 23. Rd1 Ra7 24. h4 Rb7 25. d6 Rb4 26. Bh3 Qd8 27. Bg5 Nf6 28. b3 Kg7 29. Be3 Bxe3 30. Nxe3 Qxa5 31. Nc4 Qb5 32. d7 Qb8 33. Rd3 Kg8 34. Qd1 Rd8 35. Qf3 Kg7 36. Rd6 Ng8 37. Qd5 Qb7 38. Qe5+ Kf8 39. Na5 1-0

[Event "EU-chT1 fin 03 corr"]
[Site "ICCF corr"]
[Date "1978.??.??"]
[Round "?"]
[White "Harding, Timothy David"]
[Black "Wiersma, Tjalling"]
[Result "0-1"]
[ECO "A34"]
[PlyCount "64"]
[EventDate "1978.??.??"]
[EventType "team (corr)"]
[EventRounds "8"]
[SourceTitle "Corr 2002"]
[Source "ChessBase"]
[SourceDate "2002.05.23"]
[SourceVersion "1"]
[SourceVersionDate "2002.05.23"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 c5 3. Nf3 d5 4. cxd5 Nxd5 5. g3 Nc6 6. Bg2 Nc7 7. Qa4 Bd7 8. Qe4 g6 9. Ne5 Bg7 10. Nxd7 Qxd7 11. 0-0 Rc8 12. Qa4 Ne6 13. Rb1 b6 14. a3 0-0 15. b4 Rfd8 16. Bb2 Ne5 17. Qxd7 Rxd7 18. bxc5 Rxc5 19. Ne4 Rc2 20. Bc1 Nc4 21. d3 Na5 22. Re1 Nd4 23. Kf1 Ndb3 24. Bh3 f5 25. Ng5 Bc3 26. Rd1 Bd2 27. Rxd2 Nxd2+ 28. Bxd2 Rxd2 29. Rc1 Rd6 30. Rc7 h6 31. Nf3 Rd1+ 32. Kg2 Nc6 0-1

[Event "EU-chT1 fin 03 corr"]
[Site "ICCF corr"]
[Date "1978.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Danner, Georg"]
[Result "0-1"]
[ECO "A77"]
[PlyCount "92"]
[EventDate "1978.??.??"]
[EventType "team (corr)"]
[EventRounds "8"]
[SourceTitle "Corr 2002"]
[Source "ChessBase"]
[SourceDate "2002.05.23"]
[SourceVersion "1"]
[SourceVersionDate "2002.05.23"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. e4 Bg7 8. Be2 0-0 9. 0-0 Re8 10. Nd2 Nbd7 11. f3 Ne5 12. Kh1 g5 13. Nc4 Nxc4 14. Bxc4 Nh5 15. Ne2 g4 16. Bd3 Qh4 17. g3 Qh3 18. f4 c4 19. Bc2 Bf5 20. Be3 Bxe4+ 21. Bxe4 Rxe4 22. Bf2 Nf6 23. Nc3 Re7 24. Qa4 Rae8 25. Qxc4 Ne4 26. Nxe4 Rxe4 27. Qd3 Rxf4 28. Bxa7 Rfe4 29. Bg1 Qh5 30. Rf4 Rxf4 31. gxf4 g3 32. Qxg3 Re2 33. Bf2 Qxd5+ 34. Kg1 Rxb2 35. Re1 h6 36. a4 Kh7 37. Qg4 Bd4 38. Bxd4 Qxd4+ 39. Kh1 Qd5+ 40. Kg1 Qc5+ 41. Kh1 Qc2 42. Qg3 d5 43. Rf1 d4 44. f5 Rb1 45. Rxb1 Qxb1+ 46. Kg2 Qxf5 0-1

[Event "EU-chT1 fin 03 corr"]
[Site "ICCF corr"]
[Date "1978.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Salamon, Bela"]
[Result "1-0"]
[ECO "E39"]
[PlyCount "67"]
[EventDate "1978.??.??"]
[EventType "team (corr)"]
[EventRounds "8"]
[SourceTitle "Corr 2002"]
[Source "ChessBase"]
[SourceDate "2002.05.23"]
[SourceVersion "1"]
[SourceVersionDate "2002.05.23"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 0-0 6. a3 Bxc5 7. Nf3 Nc6 8. Bg5 Nd4 9. Nxd4 Bxd4 10. e3 Qa5 11. exd4 Qxg5 12. g3 e5 13. h4 Qh6 14. dxe5 Re8 15. Be2 Rxe5 16. f4 Re3 17. Kf2 Re8 18. Rhe1 d6 19. Qd3 Bg4 20. Bxg4 Nxg4+ 21. Kf3 Qh5 22. Qd5 Qg6 23. h5 Nh2+ 24. Kg2 Qc2+ 25. Kh3 Qxb2 26. Nb5 Qf2 27. Rxe8+ Rxe8 28. Nxd6 Rf8 29. Ne4 Qe2 30. Qe5 Kh8 31. Ra2 Qg4+ 32. Kxh2 f6 33. Nf2 Qc8 34. Qc3 1-0

[Event "EU-chT1 fin 03 corr"]
[Site "ICCF corr"]
[Date "1978.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Zapletal, Jindrich"]
[Result "1-0"]
[ECO "D84"]
[PlyCount "81"]
[EventDate "1978.??.??"]
[EventType "team (corr)"]
[EventRounds "8"]
[SourceTitle "Corr 2002"]
[Source "ChessBase"]
[SourceDate "2002.05.23"]
[SourceVersion "1"]
[SourceVersionDate "2002.05.23"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 0-0 6. cxd5 Nxd5 7. Nxd5 Qxd5 8. Bxc7 Nc6 9. Ne2 Bg4 10. f3 Rac8 11. Nc3 Qe6 12. Bf4 Bxd4 13. fxg4 g5 14. Bxg5 Rfd8 15. Qc1 Nb4 16. Be2 f6 17. Bf4 Nxa2 18. Rxa2 Bxc3+ 19. bxc3 Qxa2 20. Bf3 e5 21. Bh6 b5 22. 0-0 b4 23. Qe1 bxc3 24. Qh4 Qf7 25. e4 c2 26. Bc1 Rd4 27. Qg3 h6 28. g5 fxg5 29. Qh3 Rc6 30. Bh5 Qg7 31. Qb3+ Kh8 32. Qb8+ Kh7 33. Bg4 Qe7 34. Rf8 Kg6 35. h4 Rd1+ 36. Kh2 Rxc1 37. h5+ Kg7 38. Rg8+ Kf7 39. Qb3+ Re6 40. Rg6 Rh1+ 41. Kg3 1-0

[Event "olm8 fin B6 corr"]
[Site "ICCF corr"]
[Date "1977.??.??"]
[Round "?"]
[White "Thimann, Richard Graham"]
[Black "Wiersma, Tjalling"]
[Result "0-1"]
[ECO "C19"]
[PlyCount "77"]
[EventDate "1977.??.??"]
[EventType "team (corr)"]
[EventRounds "12"]
[SourceTitle "Corr 2002"]
[Source "ChessBase"]
[SourceDate "2002.05.23"]
[SourceVersion "1"]
[SourceVersionDate "2002.05.23"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Nf3 Qa5 8. Bd2 Nbc6 9. a4 Bd7 10. Be2 c4 11. 0-0 f6 12. exf6 gxf6 13. Nh4 0-0-0 14. Bh5 e5 15. dxe5 fxe5 16. f4 d4 17. fxe5 dxc3 18. Bg5 Qc5+ 19. Kh1 Rhg8 20. Bf6 Be6 21. Qf3 Rd7 22. Rae1 Nd4 23. Qf2 Nd5 24. Nf3 Nxf6 25. Nxd4 Nxh5 26. Nxe6 Qxf2 27. Rxf2 Re8 28. Rf8 Rxf8 29. Nxf8 Rd2 30. g4 Nf4 31. e6 Kd8 32. e7+ Ke8 33. Nxh7 Re2 34. Nf6+ Kxe7 35. Nd5+ Kd6 36. Rxe2 Nxe2 37. Ne3 b5 38. a5 Nd4 39. Nf5+ 0-1

[Event "olm8 fin B6 corr"]
[Site "ICCF corr"]
[Date "1977.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Gaertig, Lothar"]
[Result "1/2-1/2"]
[ECO "E39"]
[PlyCount "81"]
[EventDate "1977.??.??"]
[EventType "team (corr)"]
[EventRounds "12"]
[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. Qc2 c5 5. dxc5 0-0 6. a3 Bxc5 7. Nf3 Nc6 8. Bg5 Nd4 9. Nxd4 Bxd4 10. e3 Qa5 11. exd4 Qxg5 12. g3 d5 13. f4 Qh5 14. Be2 Qh3 15. c5 Bd7 16. Bf1 Qh6 17. b4 Ne4 18. Nxe4 dxe4 19. b5 f5 20. Bc4 Qf6 21. Rd1 Kh8 22. Qb3 Rad8 23. Qe3 Be8 24. Be2 Rf7 25. Kf2 Rfd7 26. a4 h6 27. h4 Kg8 28. Rd2 Rxd4 29. Rxd4 Rxd4 30. Rc1 Rd7 31. Qc3 Qd8 32. Ke3 Kf8 33. Rc2 Qe7 34. a5 Rc7 35. Qe5 Rc8 36. Qd4 Rd8 37. Qc3 Rc8 38. Qe5 Qf6 39. Qd6+ Qe7 40. Qe5 Qf6 41. Qd6+ 1/2-1/2

[Event "olm8 fin B6 corr"]
[Site "ICCF corr"]
[Date "1977.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Gallmeyer, Peter"]
[Result "1-0"]
[ECO "E72"]
[PlyCount "51"]
[EventDate "1977.??.??"]
[EventType "team (corr)"]
[EventRounds "12"]
[SourceTitle "Corr 2002"]
[Source "ChessBase"]
[SourceDate "2002.05.23"]
[SourceVersion "1"]
[SourceVersionDate "2002.05.23"]
[SourceQuality "1"]

1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4 Nf6 5. g3 0-0 6. Bg2 e5 7. d5 c5 8. Nge2 Ne8 9. 0-0 f5 10. exf5 gxf5 11. f4 Nd7 12. Qc2 Ndf6 13. fxe5 dxe5 14. Be3 Qa5 15. Nc1 Ng4 16. Bg5 e4 17. Nb3 Bd4+ 18. Nxd4 cxd4 19. Nxe4 fxe4 20. Rxf8+ Kxf8 21. Rf1+ Kg8 22. Qxe4 Ng7 23. Qe7 Bf5 24. h3 Re8 25. Qxb7 Ne5 26. Bf6 1-0

[Event "olm8 fin B6 corr"]
[Site "ICCF corr"]
[Date "1977.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Kapic, Ibrahim"]
[Result "1-0"]
[ECO "D28"]
[PlyCount "50"]
[EventDate "1977.??.??"]
[EventType "team (corr)"]
[EventRounds "12"]
[SourceTitle "Corr 2002"]
[Source "ChessBase"]
[SourceDate "2002.05.23"]
[SourceVersion "1"]
[SourceVersionDate "2002.05.23"]
[SourceQuality "1"]

1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. 0-0 a6 7. Qe2 b5 8. Bd3 cxd4 9. exd4 Be7 10. Nc3 Bb7 11. Bg5 0-0 12. Rad1 Nbd7 13. Rfe1 Nd5 14. Qe4 f5 15. Qxe6+ Rf7 16. Nxd5 Bxg5 17. Nxg5 Qxg5 18. f4 Qd8 19. Bxf5 Bxd5 20. Qxd5 Nf8 21. Be4 Rc8 22. Rc1 Qa5 23. Bxh7+ Kxh7 24. Qxf7 Qd2 25. Qf5+ Ng6 1-0

[Event "olm8 fin B6 corr"]
[Site "ICCF corr"]
[Date "1977.??.??"]
[Round "?"]
[White "Wikstroem, Bertil"]
[Black "Wiersma, Tjalling"]
[Result "0-1"]
[ECO "C17"]
[PlyCount "56"]
[EventDate "1977.??.??"]
[EventType "team (corr)"]
[EventRounds "12"]
[SourceTitle "Corr 2002"]
[Source "ChessBase"]
[SourceDate "2002.05.23"]
[SourceVersion "1"]
[SourceVersionDate "2002.05.23"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. Qg4 Ne7 6. a3 Qa5 7. Nge2 cxd4 8. axb4 Qxa1 9. Nb5 0-0 10. Nc7 Nbc6 11. Nxa8 Bd7 12. Nc7 Nxb4 13. Qg5 Qa5 14. Qd2 Nf5 15. Ng3 Rc8 16. Nxf5 exf5 17. Bd3 Nxd3+ 18. cxd3 Qxc7 19. 0-0 Qc2 20. g3 Qxd2 21. Bxd2 Rc2 22. Bc1 a5 23. Kg2 a4 24. Kf3 h6 25. h4 b5 26. Kf4 Be6 27. Kf3 b4 28. Kf4 b3 0-1

[Event "NED-ch06 corr7577"]
[Site "Netherlands"]
[Date "1975.??.??"]
[Round "?"]
[White "Holscher, HGJ"]
[Black "Wiersma, Tjalling"]
[Result "0-1"]
[ECO "A34"]
[PlyCount "80"]
[EventDate "1975.??.??"]
[EventType "tourn (corr)"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Be6 7. Bxe6 Nd3+ 8. Kf1 fxe6 9. Ng5 Qd7 10. Qf3 Ne5 11. Qh3 Qd3+ 12. Qxd3 Nxd3 13. Nxe6 Kd7 14. Ng5 Nc6 15. b3 g6 16. Nf3 Bg7 17. Ne1 Ncb4 18. Rb1 Bd4 19. Nxd3 Nxd3 20. Nd1 Nxf2 21. Nxf2 Rhf8 22. b4 Rxf2+ 23. Ke1 c4 24. Bb2 Bb6 25. g3 Ke6 26. Bg7 Rd8 27. Bh6 Rf3 28. Rf1 Ra3 29. Rc1 Rxa2 30. Ke2 Rd4 31. Kf3 Ra3+ 32. Kg2 Rb3 33. Rf8 Rxb4 34. Rh8 Rxe4 35. Rxh7 Re2+ 36. Kh3 Bd4 37. Bg5 Bf6 38. Bf4 g5 39. Be3 c3 40. dxc3 g4# 0-1

[Event "NED-ch06 corr7577"]
[Site "Netherlands"]
[Date "1975.??.??"]
[Round "?"]
[White "Holscher, Peter AC"]
[Black "Wiersma, Tjalling"]
[Result "0-1"]
[ECO "D58"]
[PlyCount "44"]
[EventDate "1975.??.??"]
[EventType "tourn (corr)"]
[EventRounds "13"]
[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 d5 4. Bg5 Be7 5. e3 0-0 6. Nf3 h6 7. Bh4 b6 8. cxd5 exd5 9. Bd3 Be6 10. 0-0 Nbd7 11. Rc1 c5 12. Bb1 Re8 13. Ne5 Nxe5 14. dxe5 Ng4 15. Bxe7 Qxe7 16. Nxd5 Qh4 17. h3 Rad8 18. Qc2 Bxd5 19. Qh7+ Kf8 20. hxg4 Bxg2 21. Kxg2 Qxg4+ 22. Kh2 Rxe5 0-1

[Event "NED-ch06 corr7577"]
[Site "Netherlands"]
[Date "1975.??.??"]
[Round "?"]
[White "Mooij, Walter Johan"]
[Black "Wiersma, Tjalling"]
[Result "1-0"]
[ECO "D58"]
[PlyCount "85"]
[EventDate "1975.??.??"]
[EventType "tourn (corr)"]
[EventRounds "13"]
[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 d5 4. Bg5 Be7 5. e3 0-0 6. Nf3 h6 7. Bh4 b6 8. Be2 Bb7 9. Bxf6 Bxf6 10. cxd5 exd5 11. 0-0 Re8 12. b4 c6 13. Qb3 Nd7 14. Rfd1 Nf8 15. b5 cxb5 16. Bxb5 Re7 17. a4 Ne6 18. Rac1 Rc7 19. Rc2 Rac8 20. Rdc1 Qd6 21. Bf1 a6 22. Rb2 Be7 23. g3 Qa3 24. Qxb6 Bd8 25. Qb3 Be7 26. Rcb1 Nd8 27. Ne2 a5 28. Bh3 Ba6 29. Qxa3 Bxa3 30. Bxc8 Bxc8 31. Rb8 g5 32. Ra8 Kg7 33. Rxa5 Rc2 34. Ra8 Bf5 35. Rxd8 Rxe2 36. Ra1 Bb2 37. Re1 Rc2 38. Rd1 Rc4 39. Ne1 Be4 40. a5 Ra4 41. f3 Bg6 42. Rxd5 Bc3 43. Rb5 1-0

[Event "NED-ch06 corr7577"]
[Site "Netherlands"]
[Date "1975.??.??"]
[Round "?"]
[White "Thorn Leeson, John"]
[Black "Wiersma, Tjalling"]
[Result "0-1"]
[ECO "C18"]
[PlyCount "72"]
[EventDate "1975.??.??"]
[EventType "tourn (corr)"]
[EventRounds "13"]
[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. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Qg4 Nf5 8. Bd3 h5 9. Qf4 Nc6 10. Ne2 Nce7 11. Ng3 Qc7 12. 0-0 c4 13. Be2 g6 14. a4 Qa5 15. Nxf5 Nxf5 16. Bb2 Bd7 17. Qg5 Qd8 18. Qc1 g5 19. Qd2 f6 20. exf6 Qxf6 21. Rfe1 0-0-0 22. a5 Nd6 23. Ba3 Be8 24. Bc5 Ne4 25. Qe3 a6 26. Bb6 Rd7 27. Bxc4 g4 28. Bd3 Ng5 29. Qe5 Rf7 30. Qxf6 Rxf6 31. c4 h4 32. cxd5 h3 33. Bf1 hxg2 34. Bxg2 Nf3+ 35. Bxf3 gxf3 36. Ra3 Rg6+ 0-1

[Event "NED-ch06 corr7577"]
[Site "Netherlands"]
[Date "1975.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Roos, Piet"]
[Result "1-0"]
[ECO "A89"]
[PlyCount "41"]
[EventDate "1975.??.??"]
[EventType "tourn (corr)"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 f5 2. g3 Nf6 3. Bg2 g6 4. Nf3 Bg7 5. 0-0 0-0 6. c4 d6 7. Nc3 Nc6 8. d5 Ne5 9. Nd2 c6 10. Qb3 Qc7 11. f4 Ned7 12. dxc6 bxc6 13. Nb5 Qb7 14. Nd4 Ne4 15. Ne6 Rf6 16. Nxg7 Nxd2 17. Bxd2 Kxg7 18. Bc3 e5 19. Rfd1 Kf7 20. Qxb7 Bxb7 21. fxe5 1-0

[Event "EU-chT1 qual 1-11 corr"]
[Site "ICCF corr"]
[Date "1973.??.??"]
[Round "?"]
[White "Wiersma, Tjalling"]
[Black "Nowinszky, L."]
[Result "1-0"]
[ECO "D84"]
[PlyCount "49"]
[EventDate "1973.??.??"]
[EventType "team (corr)"]
[EventRounds "10"]
[SourceTitle "Corr 2002"]
[Source "ChessBase"]
[SourceDate "2002.05.23"]
[SourceVersion "1"]
[SourceVersionDate "2002.05.23"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 0-0 6. cxd5 Nxd5 7. Nxd5 Qxd5 8. Bxc7 Nc6 9. Ne2 Bg4 10. f3 Rac8 11. Nc3 Qe6 12. Bf4 Nxd4 13. fxg4 Rfd8 14. Bd3 Nc6 15. Qb1 Bxc3+ 16. bxc3 g5 17. Bxh7+ Kg7 18. Bf5 Qc4 19. Qb3 Qa6 20. Bxc8 gxf4 21. Rd1 Rxc8 22. exf4 Na5 23. Qd5 Rc6 24. Qe5+ Kh7 25. Rd8 1-0

[Event "EU-ch M296 corr"]
[Site "ICCF corr"]
[Date "1972.??.??"]
[Round "?"]
[White "Gereben, Erno"]
[Black "Wiersma, Tjalling"]
[Result "1/2-1/2"]
[ECO "D58"]
[PlyCount "88"]
[EventDate "1972.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[SourceTitle "Corr 2000"]
[Source "ChessBase"]
[SourceDate "2000.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 0-0 6. e3 h6 7. Bh4 b6 8. cxd5 exd5 9. Bd3 Be6 10. 0-0 Nbd7 11. Qe2 c5 12. Rad1 Ne4 13. Nxe4 Bxh4 14. Nc3 Bf6 15. Bb1 Qe7 16. Rfe1 Rfd8 17. h3 Nf8 18. Rd2 Rab8 19. Red1 c4 20. Ne5 Qe8 21. f4 b5 22. e4 Rbc8 23. f5 Bxf5 24. exf5 b4 25. Ng4 Bg5 26. Qxe8 Rxe8 27. Nxd5 Rcd8 28. Rc2 Rxd5 29. Rxc4 Re2 30. Rxb4 h5 31. Kf1 Rd2 32. Nf2 Rxd1+ 33. Nxd1 Bf6 34. Be4 Rxd4 35. Rxd4 Bxd4 36. Ke2 Nd7 37. Kd3 Bg1 38. Bf3 h4 39. Nc3 Kf8 40. Kc4 Ke7 41. Ne4 Ne5+ 42. Kb5 Kd7 43. Be2 Nc6 44. Bg4 Kc7 1/2-1/2

