| ECO B22 in 1987 play it! jahn constanze defeats black's eretova kveta in 65 moves | 1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nf6 5. Nf3 Nc6 6. Na3 Qd8 7. Nc2 e6 8. Bd3 Be7 9. O-O O-O 10. Ne5 cxd4 11. cxd4 Nb4 12. Nxb4 Bxb4 13. a3 Be7 14. b4 Bd7 15. Bb2 Rc8 16. b5 Be8 17. Qd2 Nd5 18. f4 f6 19. Ng4 Bd6 20. f5 Bd7 21. Rae1 exf5 22. Rxf5 Ne7 23. Nh6+ Kh8 24. Rh5 Be8 25. Rh3 Ng6 26. Nf5 Bc7 27. g3 Ba5 28. Qe2 Nf4 29. gxf4 Bxe1 30. Qxe1 Bg6 31. Qg3 Kg8 32. Nh6+ gxh6 33. Bxg6 |
| ECO B22 in 1980 play it! jahn constanze defeats black's wagner michel an in 76 moves | 1. e4 c5 2. c3 g6 3. d4 cxd4 4. cxd4 Bg7 5. Nf3 d5 6. Nc3 Nf6 7. e5 Ne4 8. Bd3 Nxc3 9. bxc3 O-O 10. O-O Qc7 11. Bd2 Nc6 12. Qb3 Rd8 13. h4 Na5 14. Qc2 Nc4 15. Bf4 Bg4 16. Nh2 Be6 17. h5 Rac8 18. hxg6 fxg6 19. Bxg6 hxg6 20. Qxg6 Bf7 21. Qg3 Qc6 22. Bg5 Rd7 23. Rae1 Qg6 24. f4 Be6 25. Nf3 Rf8 26. Nh4 Qh7 27. f5 Bxf5 28. e6 Rdd8 29. Bxe7 Nd2 30. Rxf5 Rxf5 31. Bxd8 Ne4 32. Qg4 Rh5 33. Rf1 Nxc3 34. e7 Ne2+ 35. Kf2 Kf7 36. Kxe2+ Ke8 37. Qg6+ Qxg6 38. Nxg6 Kd7 |
| ECO B22 in 1981 play it! jahn constanze defeats black's timme karin in 81 moves | 1. e4 c5 2. c3 e6 3. d4 cxd4 4. cxd4 Nf6 5. e5 Nd5 6. Nf3 d6 7. Bd3 Nc6 8. O-O Qc7 9. Qe2 Bd7 10. Nc3 Nxc3 11. bxc3 dxe5 12. dxe5 Ne7 13. Rb1 Ng6 14. h4 Bc6 15. Bb5 Bc5 16. Qc4 Bb6 17. Ba3 Rc8 18. Bxc6+ Qxc6 19. Qg4 Qc4 20. Nd4 h5 21. Qg5 Bd8 22. Qg3 Bxh4 23. Qe3 Qxc3 24. Nb5 Qxe3 25. Nd6+ Kd7 26. fxe3 Rc3 27. Rxb7+ Kc6 28. Rfxf7 Bd8 29. Rxa7 Nxe5 30. Ra6+ Bb6 31. Bb2 Nxf7 32. Nxf7 Rxe3 33. Bd4 Re4 34. Rxb6+ Kc7 35. Nxh8 Rxd4 36. Rxe6 Ra4 37. Re7+ Kd6 38. Rxg7 Rxa2 39. Rg5 h4 40. Rh5 Ra4 41. Ng6 |
| ECO B40 in 2000 play it! jahn constanze defeats black's sarakauskiene zi in 71 moves | 1. e4 c5 2. Nf3 e6 3. d3 Nc6 4. g3 g6 5. Bg2 Bg7 6. O-O Nge7 7. c3 d5 8. Qe2 O-O 9. e5 Qc7 10. Bf4 b5 11. Nbd2 b4 12. c4 Nf5 13. Nb3 dxc4 14. dxc4 Rb8 15. Rfd1 g5 16. Nxg5 Bxe5 17. Qg4 Ng7 18. Qh4 h5 19. Be3 Bxb2 20. Bxc5 Bxa1 21. Rxa1 Bb7 22. Ne4 f5 23. Nf6+ Rxf6 24. Qxf6 Qf7 25. Qg5 a6 26. Re1 Nd8 27. Bxb7 Nxb7 28. Bxb4 Rc8 29. c5 Kh7 30. Bc3 Nxc5 31. Nxc5 Rxc5 32. Bxg7 Qxg7 33. Qxh5+ Kg8 34. Rxe6 Rc1+ 35. Kg2 Qb7+ 36. Kh3 |
| ECO B22 in 2006 play it! jahn constanze defeats black's wolf sylvia in 67 moves | 1. e4 c5 2. c3 e5 3. Bc4 Nf6 4. Qe2 Be7 5. Nf3 Nc6 6. O-O O-O 7. d3 Ne8 8. Be3 Nc7 9. d4 cxd4 10. cxd4 exd4 11. Nxd4 Ne5 12. Bb3 d5 13. Rd1 Ng4 14. Nc3 Nxe3 15. Qxe3 Bc5 16. exd5 Bg4 17. Rd2 Re8 18. Qf4 Qe7 19. Rf1 Bh5 20. Nf5 Qd7 21. d6 Ne6 22. Qe5 f6 23. Bxe6+ Rxe6 24. Qxc5 Re5 25. Qc7 Rd8 26. Qxd7 Rxd7 27. Ng3 Bg6 28. f4 Rc5 29. f5 Bf7 30. Nge4 Re5 31. a3 Bc4 32. Rf4 b5 33. g4 a5 34. b4 |
| ECO B22 in 1991 play it! jahn constanze defeats black's kasfromm rita in 82 moves | 1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. d4 cxd4 5. Nf3 Nc6 6. Bc4 Nb6 7. Bb3 d6 8. exd6 Qxd6 9. O-O Be6 10. Bxe6 Qxe6 11. Nxd4 Nxd4 12. Qxd4 Rd8 13. Qh4 Qe2 14. Bd2 h5 15. h3 e6 16. Re1 Qc4 17. Qg3 h4 18. Qf3 Qd5 19. Qg4 Nc4 20. Bf4 Nxb2 21. Bg5 Rd7 22. Nd2 Nd3 23. Red1 Bc5 24. Rf1 f6 25. Bxf6 gxf6 26. Qg6+ Rf7 27. Ne4 Qf5 28. Nxf6+ Qxf6 29. Qxd3 Bxf2+ 30. Kh1 Rg8 31. Rad1 Qe7 32. Qe2 Bb6 33. Qb5+ Kf8 34. Rxf7+ Qxf7 35. Rf1 Bf2 36. Qe2 Ke7 37. Rxf2 Qg6 38. Qe5 Rd8 39. Qc5+ Rd6 40. Rd2 Qg3 41. Qc7+ Kf6 |
| ECO B22 in 1987 play it! jahn constanze defeats black's goehler antje in 133 moves | 1. e4 c5 2. c3 d6 3. d4 Nf6 4. Bd3 cxd4 5. cxd4 g6 6. h3 Bg7 7. Nf3 O-O 8. O-O Nc6 9. Nc3 e5 10. d5 Ne7 11. Be3 Ne8 12. Nd2 f5 13. f3 f4 14. Bf2 g5 15. a4 h5 16. a5 Ng6 17. Nb5 a6 18. Nc3 Nf6 19. Be2 Rf7 20. Na4 Bf8 21. Rc1 Bd7 22. Nb6 Rb8 23. Nxd7 Qxd7 24. Nc4 Rh7 25. Nb6 Qf7 26. Kh1 g4 27. Rc3 h4 28. hxg4 h3 29. g3 Kh8 30. Kh2 Be7 31. Qc2 Rg8 32. Rc7 fxg3+ 33. Bxg3 Nh5 34. Bf2 Ngf4 35. Nc8 Nxe2 36. Qxe2 Qf6 37. Nxe7 Rxe7 38. Rxe7 Nf4 39. Qd2 Qxe7 40. Bg3 Rf8 41. Bxf4 Rxf4 42. Kxh3 Qg5 43. Qc3 Rf7 44. Qc8+ Kg7 45. Rf2 Qh6+ 46. Kg2 Qf4 47. Qe6 Rf6 48. Qe7+ Kg8 49. Qxb7 Rh6 50. Qc8+ Kg7 51. Qc3 Rh2+ 52. Kf1 Rh1+ 53. Ke2 Qg3 54. Qd2 Ra1 55. Qg5+ Kh7 56. Qh5+ Kg7 57. Qh2 Qxh2 58. Rxh2 Rxa5 59. Kd3 Ra1 60. Rc2 Rd1+ 61. Ke3 Re1+ 62. Kf2 Rb1 63. Rc6 Rxb2+ 64. Kg3 a5 65. Rxd6 a4 66. Ra6 Ra2 67. Kh4 |
| ECO B50 in 2001 play it! jahn constanze defeats black's gruenenwald evi in 77 moves | 1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Bc4 Nc6 5. Qe2 Bg4 6. h3 Bxf3 7. Qxf3 a6 8. Bb3 e6 9. O-O Be7 10. Qe2 O-O 11. d3 Qc7 12. Re1 b5 13. Nd2 a5 14. a4 b4 15. Nf3 Rab8 16. Bc2 bxc3 17. bxc3 Nd7 18. Ba3 Bf6 19. Qd2 Rfc8 20. Rac1 Nb6 21. Rb1 Nd7 22. Bb3 Nb6 23. d4 cxd4 24. cxd4 d5 25. exd5 Nxd5 26. Bxd5 exd5 27. Rb5 Rd8 28. Rc1 Qd7 29. Bc5 Re8 30. Rcb1 h6 31. Rxb8 Nxb8 32. Qxa5 Nc6 33. Qb5 Qf5 34. Ra1 Re6 35. a5 Bd8 36. a6 Rg6 37. Kf1 Qc2 38. a7 Nxa7 39. Bxa7 |
| ECO B50 in 1991 play it! jahn constanze defeats black's bar shalom o in 79 moves | 1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. h3 Nc6 5. Bd3 g6 6. O-O Bg7 7. Bc2 O-O 8. a3 Nd7 9. d4 cxd4 10. cxd4 Qb6 11. d5 Nce5 12. Nc3 Nc4 13. Rb1 Qa5 14. b4 Qb6 15. Ne2 Nde5 16. Nxe5 Nxe5 17. Be3 Qc7 18. Bb3 b5 19. Nd4 Ba6 20. Qe2 Qb7 21. f4 Nc4 22. Bxc4 bxc4 23. b5 Bxd4 24. Bxd4 Bxb5 25. a4 a6 26. axb5 axb5 27. Rfc1 Qd7 28. Qb2 Ra5 29. Ra1 Rxa1 30. Rxa1 Rb8 31. Ra7 Qd8 32. Qb4 f6 33. Kh1 Qe8 34. e5 fxe5 35. fxe5 Rd8 36. e6 Rb8 37. Ra3 Qf8 38. Rf3 Qh6 39. Bb2 Rf8 40. Qc3 |
| ECO B31 in 2005 play it! jahn constanze defeats black's guenther anetta in 81 moves | 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. Bxc6 dxc6 5. d3 Bg7 6. h3 Nf6 7. O-O O-O 8. Re1 b6 9. Nc3 Ne8 10. e5 Nc7 11. Qe2 Ne6 12. Qe4 Qc7 13. Bd2 Rd8 14. Ne2 Rd5 15. Nf4 Nxf4 16. Qxf4 Be6 17. Bc3 b5 18. b3 h6 19. Qe3 a5 20. a4 Bf5 21. g4 Be6 22. Nd2 Qc8 23. Kh2 Qc7 24. f4 h5 25. gxh5 Bf5 26. hxg6 fxg6 27. Ne4 e6 28. Nxc5 Kf7 29. Ne4 Rh8 30. Ng5+ Ke7 31. axb5 Rxb5 32. Ra4 Bh6 33. Qg1 Ke8 34. Re3 Rc5 35. Qe1 Qa7 36. Rxa5 Rxa5 37. Bxa5 Qe7 38. Qc3 Bxg5 39. Qxc6+ Kf7 40. fxg5 Qxg5 41. Qd7+ |
| ECO B22 in 2007 play it! jahn constanze defeats black's boehlig heinz in 49 moves | 1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nc6 5. Nf3 Nf6 6. h3 e6 7. Bd3 Be7 8. O-O O-O 9. Be3 cxd4 10. cxd4 b6 11. Nc3 Qd6 12. Ne4 Nxe4 13. Bxe4 f5 14. Bf4 Qxf4 15. Bxc6 Rb8 16. Re1 Bf6 17. Qa4 a6 18. Rad1 Rd8 19. Ne5 b5 20. Qa5 Rxd4 21. Rxd4 Qxd4 22. Qc7 Bxe5 23. Rxe5 Qb6 24. Qd6 Rb7 25. Rxf5 |
| ECO B30 in 2001 play it! jahn constanze defeats black's malich burkhard in 77 moves | 1. e4 c5 2. Nf3 Nc6 3. d3 e6 4. g3 Nf6 5. Bg2 d6 6. O-O Be7 7. c3 O-O 8. Re1 Rb8 9. d4 b6 10. Qe2 Qc7 11. e5 dxe5 12. dxe5 Nd7 13. Bf4 Rd8 14. Nbd2 Nf8 15. g4 Bb7 16. Bg3 Na5 17. Ne4 Bc6 18. Nf6+ Kh8 19. Ng5 gxf6 20. Nxf7+ Kg8 21. exf6 Bd6 22. Nxd6 Rxd6 23. Rad1 Rbd8 24. Rxd6 Rxd6 25. Qe5 Bxg2 26. Qg5+ Ng6 27. Bxd6 Qxd6 28. Kxg2 Nc4 29. Qh6 Qf8 30. Qxf8+ Kxf8 31. b3 Nd6 32. Kg3 Kf7 33. g5 h6 34. f4 b5 35. Rd1 Ne4+ 36. Kf3 Nxc3 37. Rd7+ Ke8 38. Rxa7 Nd5 39. Ke4 |
| ECO B22 in 1981 play it! jahn constanze defeats black's espig gesine in 63 moves | 1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. Nf3 d6 5. d4 cxd4 6. cxd4 dxe5 7. Nxe5 e6 8. Bb5+ Bd7 9. Nxd7 Nxd7 10. O-O a6 11. Bc4 N7b6 12. Bb3 Be7 13. Nd2 Rc8 14. Ne4 Nc4 15. Qg4 Nf6 16. Qxg7 Rf8 17. Nxf6+ Bxf6 18. Qxh7 Rh8 19. Qe4 Bxd4 20. Qxb7 Nd6 21. Qxa6 Ne4 22. Be3 Qc7 23. h3 Bxe3 24. Qa4+ Ke7 25. Qxe4 Bf4 26. Rae1 Bd2 27. Bxe6 Bxe1 28. Bxc8+ Kf8 29. Rxe1 Qxc8 30. Qe7+ Kg8 31. Qg5+ Kf8 32. Rd1 |
| ECO B22 in 2007 play it! jahn constanze defeats black's schroecker maria in 51 moves | 1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. d4 e6 5. Nf3 cxd4 6. Bc4 Nb6 7. Bb3 d5 8. exd6 Qxd6 9. cxd4 Nc6 10. Nc3 Be7 11. O-O O-O 12. Be3 Rd8 13. Qe2 Nd5 14. Ne4 Qb8 15. g3 Nxe3 16. fxe3 h6 17. Rac1 Na5 18. Bc2 f5 19. Nf2 Bf6 20. e4 Bxd4 21. Nxd4 Rxd4 22. exf5 exf5 23. Qe8+ Kh7 24. Ne4 Nc6 25. Bb3 Bd7 26. Ng5+ |
| ECO B22 in 1979 play it! jahn constanze defeats black's rieks angelika in 58 moves | 1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. d4 cxd4 5. cxd4 d6 6. Nf3 Nc6 7. Bc4 dxe5 8. Qb3 e6 9. dxe5 Bb4+ 10. Bd2 a5 11. O-O a4 12. Qd1 O-O 13. Nc3 Nxc3 14. bxc3 Be7 15. Qe2 Qc7 16. Qe4 Rd8 17. Rad1 b6 18. Bd3 g6 19. Bh6 Bb7 20. Qe3 Rd7 21. Bb5 Ba6 22. Rxd7 Qxd7 23. Qxb6 Bxb5 24. Qxb5 Ra5 25. Qe2 Rd5 26. h3 Qc7 27. Qc4 Rc5 28. Qxa4 Rxc3 29. Rb1 Rd3 |
| ECO B30 in 2002 play it! jahn constanze defeats black's sarana hungeling in 49 moves | 1. e4 c5 2. Nf3 Nc6 3. c3 e6 4. d4 d5 5. exd5 exd5 6. Be3 c4 7. b3 cxb3 8. axb3 Nf6 9. Bd3 Bg4 10. h3 Bh5 11. Nbd2 Bd6 12. O-O O-O 13. Qb1 Rc8 14. Bg5 Bb8 15. Bxh7+ Kh8 16. Bf5 Ne7 17. Bxc8 Qxc8 18. Re1 Bg6 19. Qc1 Nc6 20. Bxf6 gxf6 21. Nf1 Kg8 22. Nh4 Be4 23. f3 Bg3 24. fxe4 Bxe1 25. Nf5 |
| ECO B22 in 1992 play it! jahn constanze defeats black's eidelson rakhil in 81 moves | 1. e4 c5 2. c3 d6 3. d4 Nf6 4. Bd3 Nc6 5. Nf3 cxd4 6. cxd4 g6 7. h3 Bg7 8. O-O O-O 9. Nc3 e5 10. Be3 exd4 11. Nxd4 Re8 12. Rc1 d5 13. Bb5 Bd7 14. exd5 Nxd4 15. Bxd7 Qxd7 16. Bxd4 b5 17. Qf3 b4 18. Bxf6 Bxf6 19. Qxf6 bxc3 20. Rfd1 cxb2 21. Qxb2 Rad8 22. Qd4 Qb7 23. d6 Rd7 24. Rc2 Red8 25. Qe5 Qb6 26. Rcd2 Qb8 27. Qf6 Re8 28. h4 h5 29. Qd4 Re6 30. Qc5 Qe8 31. Kh2 Re4 32. Rd4 Re5 33. Qc6 Qd8 34. g3 Re6 35. R4d2 Kh7 36. Kg2 Qe8 37. Rb2 Kg7 38. Rb7 Rxb7 39. Qxb7 Qd8 40. d7 Rb6 41. Qc8 |
| ECO B22 in 1992 play it! jahn constanze defeats black's beltz martina in 69 moves | 1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nf6 5. Nf3 e6 6. Bd3 Nc6 7. O-O Be7 8. Na3 O-O 9. Nc2 cxd4 10. cxd4 b6 11. Bg5 Bb7 12. Ne3 Qd8 13. a3 g6 14. Bc2 Nd5 15. Bh6 Re8 16. Ng4 Qd6 17. Qd2 Rad8 18. Rad1 f5 19. Nge5 Bf6 20. Ba4 a6 21. Rfe1 b5 22. Bb3 a5 23. Nxc6 Bxc6 24. Qxa5 Nc7 25. Ne5 Be4 26. f3 Bb7 27. Bf4 g5 28. Bg3 f4 29. Bf2 h5 30. Qc3 Nd5 31. Qd3 b4 32. Qg6+ Bg7 33. Nf7 Qe7 34. Nxd8 Rxd8 35. Rxe6 |
| ECO B24 in 1991 play it! jahn constanze defeats black's podrazhanskaya o in 97 moves | 1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nge2 d6 6. d3 e5 7. Nd5 Nge7 8. Bg5 h6 9. Bf6 O-O 10. Qd2 Bxf6 11. Nxf6+ Kg7 12. Nd5 Nxd5 13. exd5 Ne7 14. O-O-O b5 15. f4 f6 16. c4 b4 17. h3 Qa5 18. Kb1 Bd7 19. g4 Rae8 20. Rdf1 Qd8 21. Rhg1 exf4 22. Nxf4 f5 23. gxf5 Bxf5 24. Be4 Kh7 25. Bxf5 Rxf5 26. Ne6 Qd7 27. Rxf5 Nxf5 28. Qf4 Qf7 29. h4 Rxe6 30. dxe6 Qxe6 31. h5 g5 32. Qf2 Ng7 33. Qf3 Qe8 34. Rh1 a5 35. Qe4+ Kg8 36. Qxe8+ Nxe8 37. Kc2 Ng7 38. Kb3 Kf7 39. Ka4 Kf6 40. Kxa5 g4 41. Kb6 Ne6 42. a4 bxa3 43. bxa3 Nf4 44. Rd1 g3 45. a4 g2 46. Rg1 Nxd3 47. Rxg2 Ne5 48. Rc2 Nd3 49. a5 |
| ECO B22 in 1999 play it! jahn constanze defeats black's guenther anetta in 117 moves | 1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nf6 5. Nf3 e6 6. Bd3 Nc6 7. O-O Be7 8. Be3 O-O 9. c4 Qh5 10. Be2 Ng4 11. Bf4 Qf5 12. Bg3 Nf6 13. Nh4 Qe4 14. d5 exd5 15. Nc3 Qd4 16. Qc1 Ne4 17. Nb5 Nxg3 18. hxg3 Qe5 19. Re1 d4 20. Bf3 Qg5 21. Qd1 Bd7 22. Nc7 Rac8 23. Nd5 Bd6 24. Be4 f5 25. Nf3 Qh6 26. Bd3 f4 27. gxf4 Bxf4 28. Nxf4 Rxf4 29. Be4 Bg4 30. Qb3 b6 31. Bd5+ Kh8 32. Nh2 Bd7 33. g3 Rf5 34. Re2 Rh5 35. f4 Rh3 36. Nf1 Bg4 37. Rf2 Ne7 38. Bg2 Rh5 39. Re1 Nf5 40. Qa4 Nd6 41. Qxa7 Nxc4 42. b3 Nd6 43. Qxb6 d3 44. Re5 Qf6 45. Ne3 Be2 46. Qa6 Rd8 47. Rxh5 Bxh5 48. Qxd3 Qa1+ 49. Kh2 Nf7 50. Qf1 Qc3 51. Nd5 Qd4 52. Qe1 Nh6 53. Rd2 Ng4+ 54. Kh1 Re8 55. Qxe8+ Bxe8 56. Rxd4 cxd4 57. Bf3 Nf2+ 58. Kg1 Nd3 59. Kf1 |