| ECO C00 in 1985 play it! jahn constanze defeats black's schoenemann astr in 53 moves | 1. e4 e6 2. c4 d5 3. cxd5 exd5 4. exd5 Nf6 5. Qa4+ Nbd7 6. Nc3 Qe7+ 7. Be2 Qb4 8. Qc2 Bc5 9. Nf3 Bb6 10. a3 Qe7 11. d4 h6 12. O-O O-O 13. a4 Ba5 14. Bc4 Nb6 15. Bb3 Re8 16. Ne5 Bxc3 17. d6 Qxd6 18. Bxf7+ Kf8 19. bxc3 Rxe5 20. Ba3 c5 21. dxe5 Qxe5 22. Ba2 Ng4 23. f4 Qh5 24. h3 Ne3 25. Qf2 Nxf1 26. Bxc5+ Ke8 27. Re1+ |
| ECO C00 in 1993 play it! jahn constanze defeats black's horvath maria in 47 moves | 1. e4 e6 2. Nf3 d5 3. Nc3 Nf6 4. e5 Nfd7 5. d4 c5 6. dxc5 Bxc5 7. Bd3 f6 8. exf6 Nxf6 9. O-O O-O 10. Ne5 Nc6 11. Bf4 Nxe5 12. Bxe5 Qe8 13. Nb5 Bb6 14. Bd6 Rf7 15. Bg3 Re7 16. Nd6 Qd8 17. c4 d4 18. b4 Bc7 19. c5 e5 20. Qb3+ Kf8 21. Bxe5 Be6 22. Bc4 Bxc4 23. Qxc4 Ng4 24. Bg3 |
| ECO C05 in 1989 play it! jahn constanze defeats black's koen maja in 45 moves | 1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. f4 c5 6. c3 Nc6 7. Ndf3 Qb6 8. Ne2 f5 9. h3 Be7 10. g4 a5 11. Bg2 O-O 12. O-O cxd4 13. Nfxd4 fxg4 14. hxg4 g5 15. Kh1 gxf4 16. Nxe6 f3 17. Bxf3 Rxf3 18. Rxf3 Ndxe5 19. Qxd5 Nxf3 20. Ng5+ Kh8 21. Nf7+ Kg7 22. Bh6+ Kg6 23. Nf4+ |
| ECO C00 in 1994 play it! jahn constanze defeats black's schaer eric in 55 moves | 1. e4 e6 2. Nf3 d5 3. Nc3 Nf6 4. e5 Nfd7 5. d4 Be7 6. Bd3 c5 7. dxc5 Nxc5 8. O-O Nxd3 9. cxd3 Nc6 10. d4 h6 11. Kh1 Bd7 12. Be3 O-O 13. Ng1 Rc8 14. f4 Bb4 15. f5 f6 16. Bxh6 fxe5 17. Bxg7 Rxf5 18. Rxf5 exf5 19. Bxe5 Bxc3 20. bxc3 Nxe5 21. dxe5 Be6 22. Qh5 Qd7 23. Ne2 Rc4 24. Qg6+ Kf8 25. Nd4 Bf7 26. Qa6 Ke7 27. Qf6+ Kf8 28. e6 |
| ECO C01 in 2004 play it! jahn constanze defeats black's suter stephan in 69 moves | 1. e4 e6 2. d4 d5 3. exd5 exd5 4. c4 Nf6 5. Nc3 Be7 6. Bd3 dxc4 7. Bxc4 Nbd7 8. Nge2 Nb6 9. Bb3 c6 10. O-O O-O 11. Re1 Re8 12. Bf4 Bf5 13. Be5 Qd7 14. Ng3 Bg6 15. h4 h6 16. h5 Bh7 17. Nce4 Nxe4 18. Nxe4 Nd5 19. Qf3 f6 20. Bg3 Bb4 21. Nc5 Qf7 22. Rxe8+ Rxe8 23. a3 Bxc5 24. dxc5 Kh8 25. Bd6 Be4 26. Qh3 Qe6 27. Qxe6 Rxe6 28. f3 Bh7 29. Rd1 Bg8 30. Kf2 Re8 31. Bc2 Bf7 32. Bg6 Kg8 33. g4 Re6 34. Rd3 b5 35. Bf5 |
| ECO C04 in 1981 play it! jahn constanze defeats black's just gabriele in 67 moves | 1. e4 e6 2. d4 d5 3. Nd2 Nc6 4. Ngf3 Nf6 5. e5 Nd7 6. Bb5 Be7 7. c3 O-O 8. O-O f6 9. exf6 Nxf6 10. Ne5 Nxe5 11. dxe5 Nd7 12. Qe2 c5 13. Bd3 Rf7 14. Qh5 Nf8 15. f4 c4 16. Bc2 b5 17. Nf3 Qb6+ 18. Kh1 a5 19. Nd4 Bc5 20. Be3 b4 21. f5 exf5 22. Bxf5 g6 23. Qg5 Bxf5 24. Nxf5 Rxf5 25. Rxf5 Bxe3 26. Qg4 bxc3 27. bxc3 Rb8 28. Raf1 Bh6 29. e6 Bg7 30. e7 gxf5 31. Qxf5 Bf6 32. exf8=Q+ Kxf8 33. Qxh7 Qf2 34. Rxf2 |
| ECO C00 in 1998 play it! jahn constanze defeats black's schulz petra in 79 moves | 1. e4 e6 2. Nf3 d5 3. e5 c5 4. b4 cxb4 5. d4 Nc6 6. a3 f6 7. axb4 Bxb4+ 8. c3 Be7 9. Bd3 Qc7 10. Bf4 f5 11. h4 Bd7 12. Na3 Bxa3 13. Rxa3 Nge7 14. Ng5 h6 15. Nh3 O-O-O 16. Qa1 Rdg8 17. O-O g5 18. hxg5 hxg5 19. Nxg5 Rh4 20. g3 Rg4 21. Qc1 Ng6 22. f3 Nxf4 23. fxg4 Nxd3 24. Qe3 Nb2 25. Ra2 Nc4 26. Qf4 Qd8 27. Nf7 Qf8 28. Nh6 Rg6 29. gxf5 exf5 30. Rh2 Ne7 31. Ng4 Ng8 32. Rh7 Be6 33. Nf6 Ne7 34. Kg2 Rg7 35. Qh6 Rf7 36. Rh8 Qxh8 37. Qxh8+ Kc7 38. Rh1 Ne3+ 39. Kf3 Ng6 40. Qh6 |
| ECO B10 in 1984 play it! jahn constanze defeats black's heinig wolfram in 101 moves | 1. e4 c6 2. c4 d5 3. exd5 cxd5 4. cxd5 a6 5. Nc3 Nf6 6. Qa4+ Nbd7 7. Nf3 g6 8. Ng5 Bg7 9. Ne6 fxe6 10. dxe6 O-O 11. exd7 Bxd7 12. Qb3+ Kh8 13. Be2 Bc6 14. O-O e5 15. d3 Qd7 16. Be3 Nd5 17. Nxd5 Bxd5 18. Qb4 a5 19. Qd2 Qe6 20. a3 e4 21. d4 Rfd8 22. Rac1 Bb3 23. Rc7 Bd5 24. Qc3 Rdc8 25. Rc1 Rxc7 26. Qxc7 Bc6 27. Bc4 Qf5 28. Qd6 Qd7 29. Qxd7 Bxd7 30. Bd5 Bf5 31. Bxb7 Rd8 32. h3 Bxd4 33. Rd1 Bb6 34. Rxd8+ Bxd8 35. g4 Be6 36. b4 Bc4 37. bxa5 Bxa5 38. Bxe4 Kg7 39. Bc5 Bb5 40. g5 Bc4 41. Kg2 h6 42. gxh6+ Kxh6 43. Bb4 Bb6 44. Bc6 Kg5 45. a4 Bd8 46. Bb7 Kh4 47. f3 Be6 48. Be1+ Kg5 49. a5 Kf4 50. a6 Bb6 51. Bf2 |
| ECO B10 in 1982 play it! jahn constanze defeats black's starck in 53 moves | 1. e4 c6 2. c4 d5 3. exd5 cxd5 4. cxd5 Qxd5 5. Nc3 Qa5 6. d4 Nf6 7. Nf3 e6 8. Bd3 Bd6 9. O-O Nbd7 10. Bd2 Qd8 11. Rc1 a6 12. Qe2 O-O 13. Ng5 e5 14. Nce4 Nxe4 15. Qxe4 Nf6 16. Qh4 h6 17. Ne4 Ng4 18. Qxd8 Rxd8 19. Ba5 Rd7 20. h3 b6 21. Bxb6 Nf6 22. Nxf6+ gxf6 23. Bf5 Rb7 24. Be4 Rxb6 25. Bxa8 Bf5 26. dxe5 fxe5 27. Rc6 |
| ECO B12 in 1990 play it! jahn constanze defeats black's starck ines in 109 moves | 1. e4 c6 2. d4 d5 3. Nd2 g6 4. e5 Bg7 5. Bd3 h5 6. Ne2 Nh6 7. f4 Bf5 8. Nf3 e6 9. c3 Nd7 10. Ng5 Bxd3 11. Qxd3 Nf5 12. Ng3 Nxg3 13. Qxg3 Qe7 14. a4 Nb6 15. a5 Nc8 16. b3 Qd7 17. f5 exf5 18. Ba3 Bh6 19. e6 fxe6 20. Qe5 Rg8 21. h4 Bxg5 22. hxg5 Ne7 23. O-O O-O-O 24. Rfe1 Rde8 25. Qf6 Rgf8 26. Qxe6 Qxe6 27. Rxe6 Kd7 28. Rd6+ Kc7 29. Rf6 Rg8 30. Rf7 Kd8 31. Re1 Nc8 32. Rxe8+ Rxe8 33. Rxb7 Re3 34. Bb4 Rg3 35. a6 Rxg5 36. Ba5+ Ke8 37. Rc7 Nd6 38. Rxa7 f4 39. Ra8+ Kf7 40. a7 f3 41. Rf8+ Kxf8 42. a8=Q+ Kf7 43. g4 Ne4 44. Bb4 Rxg4+ 45. Kf1 Nd2+ 46. Kf2 Rg2+ 47. Ke3 f2 48. Qf8+ Ke6 49. Qc8+ Kf6 50. Qxc6+ Kg7 51. Qd7+ Kh8 52. Qe8+ Kh7 53. Qf7+ Kh8 54. Bf8 Rg3+ 55. Kxd2 |
| ECO B12 in 1992 play it! jahn constanze defeats black's skripchenko almi in 89 moves | 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7 8. Bd3 Bxd3 9. Qxd3 Qc7 10. Bd2 e6 11. O-O-O Ngf6 12. Rhe1 O-O-O 13. Qe2 c5 14. Kb1 c4 15. Ne5 Nxe5 16. dxe5 Nd5 17. Ne4 Be7 18. g3 Rd7 19. Qf3 Rf8 20. Qg4 Rg8 21. c3 Qxe5 22. f4 Qf5 23. Qe2 Nb6 24. g4 Qb5 25. Be3 Nd5 26. Rd4 Rc7 27. Red1 Rd8 28. Ka1 Qc6 29. g5 hxg5 30. fxg5 b5 31. h5 Rh8 32. a3 a5 33. Rf1 Bf8 34. Bg1 e5 35. Rfd1 Nf4 36. Qg4+ Kb7 37. Ng3 Nd3 38. Ne4 b4 39. Nf2 bxc3 40. Nxd3 c2 41. Nxe5 cxd1=Q+ 42. Rxd1 Qe8 43. Nxc4 Bc5 44. Bxc5 Rxc5 45. Nd6+ |
| ECO B07 in 1978 play it! jahn constanze defeats black's mueller martina in 55 moves | 1. e4 d6 2. d4 Nf6 3. Bd3 g6 4. f4 Bg7 5. Nf3 O-O 6. O-O c5 7. dxc5 dxc5 8. Nc3 a6 9. a4 Nc6 10. Be3 b6 11. Qe2 Ng4 12. Bc1 Nd4 13. Nxd4 Bxd4+ 14. Kh1 e5 15. f5 Nxh2 16. f6 Bg4 17. Qe1 Nxf1 18. Nd5 Ne3 19. Bxe3 Re8 20. Bh6 c4 21. Bxc4 Bc5 22. Qh4 Be6 23. Bg7 Bxd5 24. Bxd5 Ra7 25. Kh2 b5 26. Rh1 Bf2 27. Qxf2 Qd7 28. Qh4 |
| ECO B07 in 2000 play it! jahn constanze defeats black's kiefhaber veroni in 81 moves | 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. h3 Bg7 5. Be3 c6 6. a4 Nbd7 7. Nf3 O-O 8. Bc4 d5 9. exd5 Nb6 10. Bb3 Nbxd5 11. Nxd5 cxd5 12. O-O Bf5 13. Ne5 Rc8 14. g4 Be6 15. f3 Ne8 16. Nd3 Nd6 17. Nc5 b6 18. Nxe6 fxe6 19. Qe2 Nc4 20. Bf2 Qd6 21. c3 Bh6 22. Bxc4 Rxc4 23. Kg2 Bf4 24. Be3 Bxe3 25. Qxe3 Rc6 26. Rae1 Qf4 27. Qxf4 Rxf4 28. Kg3 Rf8 29. Re5 Kf7 30. f4 Rd8 31. h4 h6 32. h5 Rg8 33. Kh4 Rc4 34. Rfe1 gxh5 35. Kxh5 Rxa4 36. Rxe6 Re8 37. Rxh6 Ra2 38. Re2 Ra1 39. Kg5 Rg1 40. Rh7+ Kf8 41. Reh2 |
| ECO B07 in 1996 play it! jahn constanze defeats black's lauterbach ingri in 45 moves | 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bc4 Bg7 5. f3 c6 6. Bg5 Nbd7 7. Qd2 h6 8. Be3 d5 9. Bb3 dxe4 10. fxe4 Ng4 11. Nf3 Nxe3 12. Qxe3 e5 13. O-O-O exd4 14. Nxd4 Qe7 15. h4 h5 16. Qg3 Bh6+ 17. Kb1 Ne5 18. Nf3 Bg7 19. Rhf1 Bg4 20. Nxe5 Bxe5 21. Bxf7+ Kf8 22. Be6+ Bf5 23. Qxg6 |
| ECO B01 in 1999 play it! jahn constanze defeats black's bohrer ruth in 95 moves | 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Bf5 5. Nf3 c6 6. Bc4 e6 7. Bd2 Nd7 8. Qe2 Be7 9. O-O-O Ngf6 10. h3 Qc7 11. g4 Bg6 12. Nh4 Nb6 13. Bb3 O-O-O 14. Nxg6 hxg6 15. Bg5 Nfd5 16. Bxe7 Nxc3 17. bxc3 Qxe7 18. Qe5 Qf6 19. Qxf6 gxf6 20. c4 a5 21. a3 Rh7 22. Rd3 f5 23. gxf5 gxf5 24. d5 Rh4 25. dxe6 fxe6 26. c5 Nd5 27. Re1 Nf4 28. Bxe6+ Nxe6 29. Rxe6 Rdh8 30. Ree3 f4 31. Rf3 R8h5 32. Rc3 Kd7 33. Kb2 Ke6 34. Kb3 Ke5 35. Rfd3 Rh7 36. Ka4 f3+ 37. Kxa5 Rxh3 38. Rxf3 Rxf3 39. Rxf3 Kd4 40. Kb6 Kc4 41. Rf4+ Kc3 42. Ra4 Rh5 43. Ra5 Rf5 44. Kxb7 Rxf2 45. Kxc6 Kxc2 46. Kb6 Kb3 47. c6 Rf6 48. Kb7 |
| ECO B06 in 1990 play it! jahn constanze defeats black's kunze kerstin in 89 moves | 1. e4 g6 2. d4 Bg7 3. f4 c5 4. d5 d6 5. Nf3 Nf6 6. Bb5+ Bd7 7. Bxd7+ Qxd7 8. Qe2 b5 9. a4 b4 10. c4 bxc3 11. Nxc3 O-O 12. O-O e6 13. dxe6 Qxe6 14. Ng5 Qd7 15. e5 Ne8 16. e6 fxe6 17. Nxe6 Rf7 18. Nxg7 Nxg7 19. Qb5 Nc6 20. Ne4 Rb8 21. Qd3 Nd4 22. Bd2 Qf5 23. Bc3 Nge6 24. g3 c4 25. Qe3 Nc2 26. Qe2 Ned4 27. Bxd4 Nxd4 28. Qg2 Rd8 29. Rad1 Ne6 30. Nc3 Qc5+ 31. Qf2 Qxf2+ 32. Rxf2 Nc5 33. Rd4 Nd3 34. Re2 Rb7 35. Rxc4 Nxb2 36. Rd4 Rb3 37. Nd5 Nd3 38. Re7 Rb1+ 39. Kg2 Rb2+ 40. Kh3 Nf2+ 41. Kh4 h6 42. Rxa7 Rf8 43. Ne7+ Kg7 44. Rxd6 g5+ 45. Kh5 |
| ECO B06 in 1998 play it! jahn constanze defeats black's marquardt frank in 71 moves | 1. e4 g6 2. d4 Nf6 3. e5 Nh5 4. Bc4 d5 5. Bd3 a6 6. h3 Ng7 7. Nf3 Bf5 8. Nc3 Bxd3 9. Qxd3 e6 10. g4 h5 11. Rg1 hxg4 12. hxg4 c5 13. Be3 Nc6 14. dxc5 Qa5 15. O-O-O Bxc5 16. Bxc5 Qxc5 17. Ng5 Nxe5 18. Qe2 f6 19. f4 fxg5 20. Qxe5 O-O 21. Qxg5 Qe3+ 22. Kb1 Qxf4 23. Qxg6 Rf6 24. Qd3 Raf8 25. a3 Qg5 26. Rh1 Qg6 27. Qh3 Rf2 28. Rc1 d4 29. Nd1 R2f3 30. Qh8+ Kf7 31. Qh2 d3 32. cxd3 Qxd3+ 33. Ka1 Kg8 34. Qh8+ Kf7 35. Rc7+ Ke8 36. Qxg7 |
| ECO B03 in 1981 play it! jahn constanze defeats black's winter irene in 85 moves | 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. f4 dxe5 5. fxe5 Nc6 6. c3 Bf5 7. Nf3 e6 8. Bd3 Bxd3 9. Qxd3 Be7 10. O-O O-O 11. Qe4 f6 12. exf6 Rxf6 13. Nbd2 Qe8 14. Nc4 Qh5 15. Bg5 Rg6 16. Bxe7 Ndxe7 17. Nfe5 Rh6 18. Ng4 Rg6 19. Nce5 Nxe5 20. Nxe5 Rh6 21. Ng4 Rg6 22. Qxb7 Qd5 23. Qxd5 exd5 24. Ne5 Rg5 25. Rae1 Rf5 26. Rxf5 Nxf5 27. Nc6 Rf8 28. Re5 g6 29. Ne7+ Nxe7 30. Rxe7 Rf7 31. Rxf7 Kxf7 32. Kf2 Kf6 33. Kf3 h5 34. h4 Kf5 35. b3 c6 36. a3 g5 37. hxg5 Kxg5 38. g3 Kf5 39. a4 a6 40. a5 Kg5 41. c4 dxc4 42. bxc4 Kf5 43. Ke3 |
| ECO B00 in 2004 play it! jahn constanze defeats black's schmid marcel in 49 moves | 1. e4 Nc6 2. Nf3 f5 3. exf5 d5 4. d4 Bxf5 5. Bb5 e6 6. Ne5 Ne7 7. Nc3 a6 8. Ba4 b5 9. Nxb5 axb5 10. Bxb5 Qd6 11. a4 Rb8 12. O-O Rxb5 13. axb5 Nxe5 14. dxe5 Qxe5 15. c3 Ng6 16. Re1 Qf6 17. Qxd5 Bd6 18. Qc6+ Kf7 19. Ra7 Rd8 20. b6 Ne5 21. bxc7 Bxc7 22. Qxc7+ Rd7 23. Qb8 Nf3+ 24. gxf3 Qg6+ 25. Kh1 |
| ECO B00 in 1983 play it! jahn constanze defeats black's seidemann ulrike in 59 moves | 1. e4 Nc6 2. Nf3 d5 3. exd5 Qxd5 4. Nc3 Qa5 5. d4 Bg4 6. Bb5 O-O-O 7. Bxc6 bxc6 8. h3 Bxf3 9. Qxf3 Rxd4 10. Qxc6 Nf6 11. Qa8+ Kd7 12. Be3 Rd6 13. O-O a6 14. Bf4 e5 15. b4 Qxb4 16. Bxe5 Rg8 17. Bxd6 Bxd6 18. Qf3 Re8 19. Nd5 Nxd5 20. Qxd5 Qf4 21. g3 Re5 22. Qd3 Qh6 23. Rae1 Ra5 24. Qe4 Qe6 25. Qa8 Re5 26. Rxe5 Bxe5 27. Rd1+ Bd6 28. Qxa6 Qxh3 29. Qb5+ Ke7 30. Qg5+ |