| ECO B07 in 1989 play it! summermatter dan defeats black's torricelli arnol in 45 moves | 1. e4 d6 2. c4 Nf6 3. Nc3 g6 4. d4 Bg7 5. Be2 O-O 6. Nf3 Nc6 7. d5 Nb8 8. O-O Nbd7 9. Be3 a5 10. Nd2 Nc5 11. f4 Nfd7 12. Qe1 b6 13. Qg3 e6 14. h4 h5 15. dxe6 Nxe6 16. f5 Nd4 17. fxg6 fxg6 18. Bxh5 Nc2 19. Bg5 Qe8 20. Nd5 gxh5 21. Bh6 Qe5 22. Nf6+ Kf7 23. Nxd7+ |
| ECO B01 in 1990 play it! summermatter dan defeats black's tochtermann geor by checkmate in 73 moves | 1. e4 d5 2. exd5 Nf6 3. c4 c6 4. Nc3 g6 5. Nf3 Bg7 6. d4 O-O 7. Be3 cxd5 8. h3 dxc4 9. Bxc4 b6 10. Qe2 Bb7 11. O-O Nbd7 12. Rad1 a6 13. a3 b5 14. Ba2 Nb6 15. Rfe1 Re8 16. Bg5 e6 17. Ne5 Qd6 18. Qd2 Rac8 19. Qf4 Nbd7 20. Nxg6 Qc6 21. d5 exd5 22. Ne7+ Rxe7 23. Rxe7 d4 24. Nd5 Qc2 25. Nxf6+ Bxf6 26. Bxf7+ Kf8 27. Rde1 Qc6 28. Bd5 Qxd5 29. Bh6+ Kg8 30. Qg4+ Bg5 31. Rg7+ Kh8 32. Rxd7 Qc6 33. Ree7 Qxh6 34. Qxd4+ Bf6 35. Rd8+ Qf8 36. Qxf6+ Kg8 37. Qg7# |
| ECO B04 in 1991 play it! summermatter dan defeats black's qvortrup jon in 55 moves | 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 g6 5. Bc4 c6 6. O-O Bg7 7. Re1 dxe5 8. Nxe5 O-O 9. c3 Nd7 10. Nxd7 Bxd7 11. Bg5 Be6 12. Nd2 Re8 13. Bb3 a5 14. Ne4 h6 15. Bd2 b6 16. Ng3 Qd7 17. Bc2 Nf6 18. Qe2 Kh7 19. h4 b5 20. h5 Bg4 21. hxg6+ fxg6 22. Qd3 Bf5 23. Nxf5 gxf5 24. Qh3 Kg6 25. Re5 e6 26. g4 Ne4 27. gxf5+ exf5 28. Rxe4 |
| ECO D15 in 1990 play it! summermatter dan defeats black's domont alexander by checkmate in 59 moves | 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. Ne5 b5 6. g3 Bb7 7. Bg2 Qb6 8. O-O e6 9. a4 Nbd7 10. a5 Qa6 11. Nxd7 Nxd7 12. e4 b4 13. Ne2 c5 14. d5 exd5 15. exd5 Bd6 16. Qa4 Rd8 17. Bg5 f6 18. Bf4 Be5 19. Bxe5 fxe5 20. Nf4 exf4 21. Rfe1+ Kf7 22. Re6 Nb6 23. Qd1 Bxd5 24. Bxd5 Rxd5 25. Qe1 Rf8 26. Re7+ Kg8 27. Qe6+ Kh8 28. Qf7 Rg8 29. Re8 Qc8 30. Qxg8# |
| ECO D00 in 1994 play it! summermatter dan defeats black's ruetschi urs in 89 moves | 1. d4 d5 2. g3 Nf6 3. Bg2 c6 4. Nf3 Bf5 5. O-O e6 6. c4 h6 7. Nc3 Nbd7 8. Qb3 Qb6 9. c5 Qa6 10. Bf4 b6 11. cxb6 axb6 12. Nd2 Be7 13. e4 Bg6 14. Rfe1 Kf8 15. Rac1 Bd8 16. exd5 cxd5 17. Nb5 Kg8 18. a3 Kh7 19. Bf1 Qa4 20. Qxa4 Rxa4 21. Bd6 Ne8 22. b3 Ra8 23. Bb4 Ndf6 24. Nf3 Nd7 25. Rc6 Rg8 26. Rec1 Rh8 27. Ne5 Nxe5 28. dxe5 f6 29. Rc8 Nc7 30. Rxa8 Nxa8 31. Rc8 Bc7 32. Rxa8 Rxa8 33. Nxc7 Rc8 34. Nxe6 Be4 35. f3 Bxf3 36. Nd4 Be4 37. e6 Kg8 38. Bb5 Bg6 39. Bc6 Be8 40. Bxe8 Rxe8 41. Bd6 g6 42. Kf2 f5 43. a4 Kg7 44. Be5+ Kf8 45. Bc7 |
| ECO D30 in 1992 play it! summermatter dan defeats black's terraz christian in 72 moves | 1. d4 d5 2. c4 e6 3. Nf3 c6 4. g3 Nf6 5. Bg2 Be7 6. O-O O-O 7. Nc3 a6 8. Qd3 Nbd7 9. Rd1 b5 10. c5 b4 11. Na4 a5 12. Qc2 Ba6 13. Bf1 Ne8 14. a3 bxa3 15. Rxa3 Bb5 16. Bd2 Qb8 17. Rda1 Bd8 18. Nc3 Bc4 19. b3 Ba6 20. Nd1 Bc8 21. Bxa5 Rxa5 22. Rxa5 Bxa5 23. Rxa5 e5 24. dxe5 Nxe5 25. Nd4 Qc7 26. b4 Nf6 27. Qa4 Bd7 28. Ra7 Qd8 29. Nc3 h5 30. Qa5 Qe8 31. Qc7 h4 32. gxh4 Qe7 33. Qd6 Qe8 34. b5 cxb5 35. Nxd5 Nxd5 36. Qxd5 Qd8 |
| ECO D11 in 1990 play it! summermatter dan defeats black's nemeth maria in 81 moves | 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Qc2 e6 5. g3 Nbd7 6. Bg2 Bd6 7. O-O Ne4 8. Ne1 f5 9. Nd3 O-O 10. Bf4 g5 11. Bxd6 Nxd6 12. Nd2 Ne4 13. Nf3 dxc4 14. Qxc4 Nb6 15. Qc1 Bd7 16. Nc5 g4 17. Ne5 Nxc5 18. dxc5 Nd5 19. e4 Nf6 20. Rd1 Qe8 21. Rd6 Rd8 22. Qg5+ Kh8 23. Rad1 fxe4 24. Qd2 Nd5 25. Bxe4 Rg8 26. Qh6 Rg7 27. Qh4 b6 28. Bg6 Qf8 29. Bxh7 Qf6 30. Qxf6 Nxf6 31. Bg6 Kg8 32. Rxe6 Rxg6 33. Nxg6 Bxe6 34. Rxd8+ Kg7 35. cxb6 axb6 36. Ne5 Bxa2 37. Nxc6 Kg6 38. Rd6 Kf5 39. Ne7+ Ke5 40. Rxb6 Nd7 41. Rb4 |
| ECO D30 in 1989 play it! summermatter dan defeats black's mira helene in 73 moves | 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. g3 c5 5. cxd5 exd5 6. Bg2 Nc6 7. O-O Be7 8. Nc3 cxd4 9. Nxd4 O-O 10. Bg5 h6 11. Bf4 Bc5 12. Nxc6 bxc6 13. Na4 Bd6 14. Bxd6 Qxd6 15. Rc1 Ba6 16. Nc5 Bc8 17. Qd4 Re8 18. e4 Rb8 19. Rfe1 Qe7 20. h3 dxe4 21. Nxe4 Nxe4 22. Rxe4 Be6 23. b3 Qa3 24. Rc2 Red8 25. Qa4 Qd6 26. Re1 Bd5 27. Bxd5 cxd5 28. Qxa7 d4 29. Qe7 Qd5 30. Qe4 Qd7 31. Qg4 Qd5 32. Rd2 Qa5 33. Red1 Rb5 34. Rxd4 Rxd4 35. Qxd4 Qxa2 36. Qd8+ Kh7 37. Qd3+ |
| ECO D25 in 1997 play it! summermatter dan defeats black's fux anton in 55 moves | 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 Bg4 5. Bxc4 e6 6. Nc3 Nbd7 7. h3 Bh5 8. O-O Be7 9. Qe2 O-O 10. Rd1 c6 11. e4 Qc7 12. Bg5 Rfe8 13. Rac1 h6 14. Bh4 Qa5 15. e5 Nh7 16. Bxe7 Rxe7 17. g4 Bg6 18. Nh4 Nhf8 19. f4 Nb6 20. Bb3 Rd8 21. f5 exf5 22. gxf5 Bh7 23. Qg4 Red7 24. Rc2 Kh8 25. Rg2 f6 26. exf6 gxf6 27. Ne4 Re7 28. Qg8+ |
| ECO D30 in 1991 play it! summermatter dan defeats black's costa jean by checkmate in 61 moves | 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. g3 dxc4 5. Bg2 Nc6 6. O-O Rb8 7. Nc3 b5 8. Ne5 Nxe5 9. dxe5 Nd7 10. Bc6 a6 11. Be3 Bb7 12. Bxb7 Rxb7 13. Qd4 Be7 14. Rfd1 Qc8 15. a4 b4 16. Ne4 a5 17. Bg5 Bxg5 18. Nxg5 c5 19. Qf4 O-O 20. Qe4 g6 21. Qh4 h5 22. Ne4 Nxe5 23. Qg5 Qc7 24. Nf6+ Kg7 25. Nxh5+ Kh7 26. Nf6+ Kg7 27. f4 Nc6 28. Rd7 Qc8 29. Ng4 Rh8 30. Qf6+ Kg8 31. Qxf7# |
| ECO D02 in 1993 play it! summermatter dan defeats black's kaenel hans in 105 moves | 1. d4 d5 2. Nf3 c6 3. g3 g6 4. Bg2 Bg7 5. O-O Nd7 6. Nbd2 f5 7. c4 e6 8. b3 Ne7 9. Ba3 O-O 10. Rc1 Re8 11. Qc2 a5 12. Bd6 Nf6 13. Be5 b6 14. Ne1 Bb7 15. Nd3 Ne4 16. Bxg7 Kxg7 17. Nf3 Rc8 18. Qb2 Ng8 19. Nfe5 Ngf6 20. a4 Nd7 21. Nxd7 Qxd7 22. Ne5 Qe7 23. Bxe4 fxe4 24. c5 b5 25. Qd2 b4 26. f3 exf3 27. Rxf3 Rf8 28. Rcf1 Rf5 29. g4 Rxf3 30. Rxf3 Rf8 31. Qe3 Rxf3 32. exf3 g5 33. f4 h6 34. Kg2 gxf4 35. Qxf4 Qe8 36. g5 hxg5 37. Qxg5+ Kh7 38. Kf3 Qf8+ 39. Ke3 Qh6 40. h4 Qxg5+ 41. hxg5 Kg7 42. Kf4 Kh7 43. Kg4 Kg7 44. Kf4 Ba8 45. Nf3 Kg6 46. Ke5 Bb7 47. Kxe6 Ba6 48. Ne5+ Kxg5 49. Nxc6 Kf4 50. Kxd5 Ke3 51. Nxa5 Kd3 52. c6 Kc3 53. Kc5 |
| ECO D07 in 1992 play it! summermatter dan defeats black's kleinheinz g in 65 moves | 1. d4 d5 2. c4 Nc6 3. Nc3 dxc4 4. d5 Ne5 5. Qd4 Ng6 6. e4 e5 7. Qxc4 Bd6 8. Nf3 Nf6 9. h4 h6 10. h5 Ne7 11. Be3 O-O 12. Be2 a6 13. Rd1 Bg4 14. Nd2 b5 15. Qb3 Bxe2 16. Nxe2 Ng4 17. Ng3 f5 18. exf5 Nxf5 19. Nxf5 Rxf5 20. Ne4 Nxe3 21. Qxe3 Bb4+ 22. Ke2 Ba5 23. d6 Bb6 24. Qb3+ Kh8 25. Qe6 Qf8 26. f3 cxd6 27. Rxd6 Bd4 28. Rc1 Rxh5 29. Rdc6 Re8 30. Qg6 Rh4 31. Nd6 Rd8 32. Rc8 e4 33. Rxd8 |
| ECO D30 in 1990 play it! summermatter dan defeats black's kaenel hans in 105 moves | 1. d4 d5 2. c4 e6 3. Nf3 c6 4. g3 dxc4 5. Bg2 b5 6. O-O Bb7 7. Nc3 Nf6 8. Ne5 Nd5 9. e4 Nxc3 10. bxc3 Nd7 11. f4 Be7 12. Rb1 Rb8 13. Rb2 O-O 14. Be3 a6 15. Rbf2 f6 16. Nxd7 Qxd7 17. f5 exf5 18. Rxf5 Qe8 19. R5f2 Qg6 20. Bf4 Rbd8 21. h4 Qe8 22. h5 Qd7 23. Kh2 Bc8 24. e5 fxe5 25. Bxe5 Rxf2 26. Rxf2 Bd6 27. Qe1 Bxe5 28. Qxe5 Re8 29. Qf4 h6 30. g4 Kh7 31. Be4+ Kg8 32. Bg6 Rd8 33. Bf5 Qd6 34. Qxd6 Rxd6 35. Bxc8 a5 36. Re2 Kf7 37. Bf5 b4 38. cxb4 axb4 39. Rb2 Rxd4 40. Rxb4 Rd2+ 41. Kg3 c3 42. Rc4 Rxa2 43. Rxc3 Ra6 44. Be4 Kf6 45. Rxc6+ Rxc6 46. Bxc6 Kg5 47. Bd7 g6 48. hxg6 Kxg6 49. Be8+ Kg5 50. Bh5 Kf6 51. Kf4 Ke6 52. Ke4 Kf6 53. Kd5 |
| ECO D30 in 1992 play it! summermatter dan defeats black's zindel ernst in 65 moves | 1. d4 d5 2. c4 e6 3. Nf3 Be7 4. g3 Nf6 5. Bg2 Nbd7 6. O-O O-O 7. Qc2 c6 8. Nbd2 Re8 9. Rd1 b5 10. c5 Bf8 11. b3 e5 12. Nxe5 Nxe5 13. dxe5 Rxe5 14. Nf3 Bf5 15. Qb2 Re8 16. Bg5 Be7 17. Nd4 Bd7 18. b4 a5 19. a3 Qc7 20. Bf4 Qb7 21. Nb3 a4 22. Nd4 Rad8 23. Be5 Ng4 24. Bxg7 f6 25. h3 Kxg7 26. hxg4 Bxg4 27. Bf3 h5 28. Bxg4 hxg4 29. Ne6+ Kg6 30. Rd4 f5 31. Rxg4+ fxg4 32. Qg7+ Kf5 33. Nd4+ |
| ECO D30 in 1990 play it! summermatter dan defeats black's seibel w in 71 moves | 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. g3 Be7 5. Bg2 O-O 6. O-O c6 7. Qc2 Nbd7 8. Nbd2 Re8 9. b3 Nf8 10. Bb2 Ng6 11. Rad1 Qc7 12. e4 dxe4 13. Nxe4 Nxe4 14. Qxe4 Bd7 15. h4 Bf6 16. h5 Ne7 17. Ne5 Rad8 18. Ng4 Bg5 19. Qe1 Nf5 20. Qc3 Nh6 21. d5 e5 22. Nxe5 Bf6 23. d6 Qb6 24. Rfe1 Ng4 25. c5 Qa6 26. f4 b5 27. Qc2 Qc8 28. Nxg4 Rxe1+ 29. Rxe1 Bxb2 30. Nh6+ gxh6 31. Qxb2 Bg4 32. Qf6 Bxh5 33. Bh3 Qxh3 34. Qxd8+ Kg7 35. Re3 Bg6 36. Qe7 |
| ECO A40 in 1990 play it! summermatter dan defeats black's gimmel rolf in 63 moves | 1. d4 e6 2. c4 Nf6 3. g3 c6 4. Nf3 Be7 5. Bg2 O-O 6. O-O d5 7. Qc2 Ne4 8. Nbd2 f5 9. Ne5 Nd7 10. Ndf3 Ng5 11. Bxg5 Bxg5 12. Nxg5 Qxg5 13. Nd3 Qf6 14. e3 g5 15. Rac1 h5 16. f4 g4 17. b4 Nb6 18. Ne5 dxc4 19. Nxc4 Nd5 20. Qb3 Bd7 21. Ne5 Be8 22. a4 h4 23. Rf2 Rc8 24. Rfc2 Rc7 25. b5 Rh7 26. bxc6 bxc6 27. Rxc6 Bxc6 28. Rxc6 Nc7 29. d5 hxg3 30. hxg3 Rd8 31. dxe6 Kf8 32. e7+ |
| ECO A40 in 1991 play it! summermatter dan defeats black's klinger josef in 95 moves | 1. d4 e6 2. c4 f5 3. Nf3 Nf6 4. Qc2 Be7 5. g3 O-O 6. Bg2 d5 7. O-O c6 8. b3 b6 9. Ba3 Bxa3 10. Nxa3 Qe7 11. Qb2 Nbd7 12. Rac1 Bb7 13. Rfd1 Ne4 14. Nb1 f4 15. Nbd2 c5 16. dxc5 bxc5 17. Nxe4 dxe4 18. Ng5 Qxg5 19. Rxd7 Rab8 20. Qc3 e5 21. Rcd1 Ba8 22. e3 Rb7 23. R7d5 fxg3 24. hxg3 Rbf7 25. Qxe5 Qg6 26. Rd8 Bb7 27. R1d6 Qg4 28. Rxf8+ Rxf8 29. Qe6+ Qxe6 30. Rxe6 Rd8 31. Re7 Rd1+ 32. Kh2 Bc6 33. Rc7 Be8 34. Bxe4 Rd2 35. Kg2 Rxa2 36. Rxc5 Rb2 37. Rc8 Kf7 38. Rc7+ Kf6 39. Rxa7 Rxb3 40. Ra6+ Ke7 41. Bd5 Bh5 42. Re6+ Kd8 43. Re5 Be2 44. Rg5 g6 45. Bg8 Ke7 46. Bxh7 Bxc4 47. Bxg6 Kf6 48. Rc5 |
| ECO A85 in 1989 play it! summermatter dan defeats black's vanka miloslav in 97 moves | 1. d4 f5 2. c4 Nf6 3. Nc3 g6 4. g3 Bg7 5. Bg2 O-O 6. Nf3 d6 7. O-O Qe8 8. b3 Nc6 9. Bb2 e5 10. d5 Nd8 11. Rc1 h6 12. a4 g5 13. c5 e4 14. Nd4 dxc5 15. Ncb5 Qe7 16. Ba3 b6 17. f3 a6 18. Nc3 Qe5 19. e3 exf3 20. Nxf3 Qxe3+ 21. Kh1 Ng4 22. Rc2 Qe7 23. d6 Qxd6 24. Rd2 Qf6 25. Nd5 Qf7 26. h3 Ne5 27. Nxe5 Bxe5 28. Re1 Nc6 29. Rxe5 Nxe5 30. Bb2 Re8 31. Qa1 c6 32. Nxb6 Qxb3 33. Nxa8 Qxg3 34. Re2 Nf3 35. Rxe8+ Kf7 36. Qa2+ Kxe8 37. Qg8+ Ke7 38. Qg7+ Ke6 39. Qf6+ Kd5 40. Nb6+ Ke4 41. Qxc6+ Kd3 42. Qxf3+ Qxf3 43. Bxf3 Be6 44. a5 f4 45. Bb7 Bxh3 46. Bxa6+ Ke3 47. Ba3 Kd4 48. Kg1 Bf5 49. Bb7 |
| ECO A81 in 1996 play it! summermatter dan defeats black's preiss martin in 61 moves | 1. d4 f5 2. g3 g6 3. Bg2 Nf6 4. Nh3 Bg7 5. c3 Nc6 6. Nd2 e6 7. O-O O-O 8. e4 fxe4 9. Nxe4 Nxe4 10. Bxe4 d6 11. Bg2 Kh8 12. Bd2 Bd7 13. Qe2 Qf6 14. Ng5 Rae8 15. Qg4 Re7 16. Qh3 h5 17. Qh4 e5 18. d5 Nd8 19. h3 Kg8 20. Qc4 a6 21. Ne4 Qf7 22. Qxc7 Bxh3 23. Qxd6 Bxg2 24. Kxg2 Rd7 25. Qb4 Qxd5 26. Qb3 Nc6 27. Qxd5+ Rxd5 28. Bg5 Na5 29. Rad1 Rb5 30. b3 Rb6 31. Bd8 |
| ECO A80 in 1991 play it! summermatter dan defeats black's horn pascal in 81 moves | 1. d4 f5 2. Nf3 Nf6 3. c4 g6 4. g3 Bg7 5. Bg2 c6 6. O-O O-O 7. Nc3 d5 8. Qb3 Kh8 9. Bf4 e6 10. Rad1 h6 11. Ne5 Qe8 12. f3 g5 13. Bc1 Nbd7 14. Nxd7 Nxd7 15. e4 e5 16. exd5 exd4 17. Rfe1 Qg6 18. Ne2 c5 19. f4 Nb6 20. Bd2 Bd7 21. Qc2 g4 22. Nc1 Rae8 23. Nd3 Qd6 24. b3 Nc8 25. Qb1 b6 26. b4 Ba4 27. Rxe8 Rxe8 28. Re1 cxb4 29. Rxe8+ Bxe8 30. Bxb4 Qc7 31. Qe1 Bf7 32. Ne5 Bg8 33. Bf1 a5 34. Ba3 Nd6 35. Bd3 b5 36. c5 Ne4 37. d6 Qb7 38. c6 Qa7 39. Ng6+ Kh7 40. d7 Bf6 41. Be7 |