| ECO A04 in 1986 play it! nielsen j defeats black's jardin j in 39 moves | 1. Nf3 d6 2. d4 Nf6 3. g3 g6 4. Bg2 Bg7 5. O-O O-O 6. Nbd2 Nc6 7. Nc4 Bd7 8. a4 Qe8 9. h3 e5 10. dxe5 dxe5 11. Be3 e4 12. Nd4 Rd8 13. Nxc6 Bxc6 14. Qc1 Bd5 15. Nd2 Nd7 16. a5 c5 17. Rd1 Qe5 18. c3 Bb3 19. Ra2 Qe8 20. Nxe4 |
| ECO B41 in 1960 play it! nielsen j defeats black's arlauskas l in 45 moves | 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 Nf6 6. Nc3 Bb4 7. e5 Qa5 8. exf6 Bxc3+ 9. bxc3 Qxc3+ 10. Qd2 Qxa1 11. Be2 Nc6 12. fxg7 Rg8 13. Nxc6 bxc6 14. O-O Qxg7 15. g3 d5 16. Ba3 Qg5 17. Qb4 Qd8 18. cxd5 cxd5 19. Rc1 a5 20. Qf4 Bd7 21. Bh5 Rg7 22. Qd6 Rg8 23. Rc7 |
| ECO B41 in 1960 play it! nielsen j defeats black's butenschoen f in 61 moves | 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 Qe7+ 11. Qe2 Qxe2+ 12. Nxe2 O-O 13. Bf4 Re8 14. O-O-O Bd7 15. Rhe1 Re6 16. f3 Rc8 17. Bf5 Re7 18. Ng3 Rxe1 19. Rxe1 Nd4 20. Bxd7 Nxd7 21. c3 Ne6 22. Be3 a5 23. Rd1 Nf6 24. Nf5 Kf8 25. g4 h6 26. h4 Rc6 27. g5 hxg5 28. hxg5 Nd7 29. Rxd5 Ndc5 30. Kc2 b6 31. Rd6 |
| ECO B33 in 1965 play it! nielsen j defeats black's hybl j in 117 moves | 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 Be7 8. O-O-O Nxd4 9. Qxd4 O-O 10. f4 h6 11. Bh4 Qa5 12. Bc4 e5 13. fxe5 dxe5 14. Qd3 Bg4 15. Bxf6 Bxf6 16. Rdf1 Rac8 17. Bb3 Be6 18. Nd5 Bd8 19. Kb1 Qc5 20. Qg3 Bxd5 21. exd5 Bc7 22. Qf3 Bd6 23. g4 Rce8 24. Re1 Qd4 25. Re4 Qd2 26. h4 h5 27. c3 Qh6 28. Bc2 Bc5 29. g5 Qh8 30. Rc4 Bd6 31. Rf1 g6 32. Be4 Rd8 33. Ra4 Bb8 34. Rb4 b6 35. Rc4 Qg7 36. Rc6 Rd6 37. Qd3 Rfd8 38. Qc4 Kh8 39. Rf3 Qg8 40. Qf1 Kg7 41. Rf6 Rxc6 42. dxc6 Qe8 43. Qc4 Qe7 44. Bd5 Rf8 45. Qe4 Kh8 46. Bc4 Bc7 47. b4 a5 48. a3 axb4 49. axb4 Kg7 50. Kb2 Bd8 51. Kb3 Qc7 52. Bxf7 Rxf7 53. Qxg6+ Kf8 54. Qh6+ Kg8 55. Re6 Re7 56. Qg6+ Kf8 57. Qf6+ Kg8 58. Rd6 e4 59. Qd4 |
| ECO B41 in 1977 play it! nielsen j defeats black's holm v in 41 moves | 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. g4 Nc6 7. g5 Nd7 8. Ndb5 Nb6 9. Bf4 e5 10. Be3 Be7 11. h4 O-O 12. Qd2 Be6 13. Nd5 Nc8 14. O-O-O a6 15. Nbc7 Rb8 16. Bc4 Bxd5 17. Nxd5 b5 18. Be2 Re8 19. h5 Nd4 20. Bg4 Ne6 21. g6 |
| ECO B41 in 1977 play it! nielsen j defeats black's lerfald in 57 moves | 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. g4 e5 7. Nf5 g6 8. Ne3 Bg7 9. g5 Nh5 10. Ned5 Be6 11. Be2 Bxd5 12. Nxd5 Nf4 13. Nxf4 exf4 14. Bxf4 Bxb2 15. Rb1 Qa5+ 16. Kf1 Be5 17. Bxe5 dxe5 18. Rxb7 O-O 19. Bc4 Nc6 20. Qd5 Qd8 21. Rxf7 Qxd5 22. Rxf8+ Kxf8 23. Bxd5 Rc8 24. Kg2 Nb4 25. c4 Nxa2 26. Ra1 Nb4 27. Rxa7 Nxd5 28. cxd5 Kg8 29. Re7 |
| ECO B98 in 1978 play it! nielsen j defeats black's frank l in 43 moves | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Qc7 9. O-O-O b5 10. Bd3 O-O 11. e5 dxe5 12. fxe5 Nd5 13. h4 Bb7 14. Nxd5 Bxd5 15. Qh5 g6 16. Qh6 Rc8 17. Bf6 Bf8 18. Qe3 Nd7 19. h5 Bg7 20. Bxg7 Kxg7 21. hxg6 fxg6 22. Qh6+ |
| ECO B41 in 1977 play it! nielsen j defeats black's lofgren in 65 moves | 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. g4 Nc6 7. g5 Nd7 8. Ndb5 Nb6 9. Bf4 Ne5 10. Qh5 Ng6 11. Be3 Be7 12. h4 a6 13. Nd4 Qc7 14. O-O-O Bd7 15. f4 Nc4 16. Qe2 Nxe3 17. Qxe3 d5 18. f5 Nf4 19. e5 Nh5 20. Be2 g6 21. f6 Bc5 22. Rhe1 Rc8 23. Bxh5 gxh5 24. Qf3 Bb4 25. Nxd5 exd5 26. e6 Bxe6 27. c3 Bxc3 28. Nxe6 fxe6 29. Rxe6+ Kf8 30. bxc3 Qa5 31. Kb2 Rc5 32. Rde1 Qb5+ 33. Ka1 |
| ECO B99 in 1969 play it! nielsen j defeats black's hugolf e in 71 moves | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Qc7 9. O-O-O Nbd7 10. g4 b5 11. Bxf6 gxf6 12. a3 Rb8 13. f5 Ne5 14. Qh3 O-O 15. Qh6 Kh8 16. g5 Rg8 17. gxf6 Ng4 18. Qh5 Bxf6 19. Rg1 b4 20. axb4 Rxb4 21. Rxg4 Rxg4 22. Qxg4 Rxd4 23. Bd3 Rb4 24. Rg1 Qd8 25. Qh5 Bxc3 26. bxc3 Rb1+ 27. Kxb1 Qb6+ 28. Ka2 Qa5+ 29. Kb2 Qb6+ 30. Bb5 Qxg1 31. Qxf7 Qg8 32. Qf6+ Qg7 33. Qd8+ Qg8 34. Be8 exf5 35. Qxc8 fxe4 36. Bd7 |
| ECO B81 in 1986 play it! nielsen j defeats black's zikharev v in 59 moves | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g4 h6 7. g5 hxg5 8. Bxg5 Nc6 9. Qd2 Qb6 10. Nb3 a6 11. O-O-O Bd7 12. Bf4 Ne5 13. Be3 Qc7 14. f4 Nc4 15. Bxc4 Qxc4 16. e5 dxe5 17. fxe5 Nd5 18. Nxd5 Qxd5 19. Qf2 Qb5 20. Rhf1 O-O-O 21. Bg5 f6 22. a4 Qxa4 23. exf6 Qb5 24. h4 gxf6 25. Bxf6 Bh6+ 26. Kb1 Rdf8 27. Qa7 Bg7 28. Nc5 Rxf6 29. Nxd7 Qxd7 30. Qa8+ |
| ECO B36 in 1973 play it! nielsen j defeats black's schonherr h in 87 moves | 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Nf6 6. Nc3 Nxd4 7. Qxd4 d6 8. f3 Bg7 9. Be3 O-O 10. Qd2 Qa5 11. Be2 Be6 12. Rc1 Rfc8 13. Nd5 Qxd2+ 14. Kxd2 Nxd5 15. cxd5 Bd7 16. Rc2 Rxc2+ 17. Kxc2 Rc8+ 18. Kb1 a6 19. Rc1 h5 20. Rxc8+ Bxc8 21. Bb6 Kf8 22. Kc2 e6 23. Bc4 e5 24. Be3 Ke7 25. Kc3 f5 26. Kb4 fxe4 27. fxe4 Kd7 28. Bg5 Kc7 29. Be2 Bf8 30. Kc3 Bd7 31. Kd2 Be8 32. g4 Kb6 33. b3 Kc7 34. Kc3 Bg7 35. a4 Bf8 36. Kc4 Bg7 37. Kb4 Bf8 38. Ka5 Bf7 39. b4 Be8 40. b5 axb5 41. axb5 Bf7 42. b6+ Kc8 43. Bb5 hxg4 44. Kb4 |
| ECO C28 in 1965 play it! nielsen j defeats black's borisenko g in 29 moves | 1. e4 e5 2. Nc3 Nf6 3. Bc4 Nc6 4. d3 Bb4 5. Nf3 d6 6. O-O Bxc3 7. bxc3 h6 8. h3 Be6 9. Bb3 Qe7 10. Re1 g5 11. Nh2 O-O-O 12. d4 d5 13. exd5 Nxd5 14. Qd3 exd4 15. cxd4 |
| ECO C27 in 1961 play it! nielsen j defeats black's brazda j in 79 moves | 1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 4. Qh5 Nd6 5. Bb3 Nc6 6. Nb5 g6 7. Qf3 f5 8. Qd5 Qe7 9. Nxc7+ Kd8 10. Nxa8 b6 11. d3 Bb7 12. h4 f4 13. Nxb6 axb6 14. Qf3 Nd4 15. Qh3 Bh6 16. Ne2 Nxe2 17. Kxe2 e4 18. Re1 Re8 19. Bd2 exd3+ 20. Kf1 Ne4 21. Kg1 Nxf2 22. Kxf2 Qc5+ 23. Kf1 Re2 24. Rxe2 dxe2+ 25. Kxe2 f3+ 26. gxf3 Qe5+ 27. Kf1 Bxd2 28. Rd1 Qd4 29. Qg2 Ba6+ 30. c4 Bxc4+ 31. Bxc4 Qxc4+ 32. Qe2 Qxe2+ 33. Kxe2 Bf4 34. Rd4 Be5 35. Rb4 Kc7 36. Kd3 d5 37. h5 g5 38. b3 h6 39. Rg4 Kc6 40. Rg2 |
| ECO C27 in 1973 play it! nielsen j defeats black's muir w in 125 moves | 1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 4. Qh5 Nd6 5. Bb3 Be7 6. Nf3 Nc6 7. Nxe5 O-O 8. O-O Nxe5 9. Qxe5 Bf6 10. Qf4 Ne8 11. d4 c6 12. d5 d6 13. Qf3 c5 14. a4 b6 15. Ne4 Be5 16. c3 Qh4 17. h3 h6 18. Bc2 f5 19. Ng3 g6 20. Ne2 Ba6 21. Re1 Kg7 22. Nf4 Nc7 23. g3 Qf6 24. Bd3 Bb7 25. Bc4 a6 26. Qd3 Bxf4 27. Bxf4 Rfe8 28. Rad1 Re7 29. Rxe7+ Qxe7 30. b4 Rf8 31. Bb3 g5 32. Bd2 Qe4 33. Qxe4 fxe4 34. bxc5 bxc5 35. c4 Rb8 36. Bc2 Bc8 37. Bc3+ Kf7 38. Kh2 Bd7 39. Re1 Ne8 40. Re3 h5 41. a5 Ng7 42. Bxe4 g4 43. hxg4 hxg4 44. Bc2 Re8 45. Rxe8 Nxe8 46. Kg2 Ng7 47. Bxg7 Kxg7 48. Kf1 Kf6 49. Ke2 Ke5 50. Ke3 Be8 51. Bd1 Bd7 52. Bb3 Kf5 53. Bc2+ Ke5 54. Bh7 Ba4 55. Bg8 Bd7 56. Be6 Bxe6 57. dxe6 Kxe6 58. f3 gxf3 59. Kxf3 Ke5 60. g4 d5 61. cxd5 Kxd5 62. Ke3 c4 63. Kd2 |
| ECO C28 in 1965 play it! nielsen j defeats black's estrin yakov in 73 moves | 1. e4 e5 2. Nc3 Nf6 3. Bc4 Nc6 4. d3 Bb4 5. Ne2 d5 6. exd5 Nxd5 7. O-O Be6 8. Bxd5 Bxd5 9. f4 O-O 10. a3 Bxc3 11. Nxc3 exf4 12. Bxf4 Be6 13. Qf3 Nd4 14. Qf2 c5 15. Ne4 b6 16. b4 Bd5 17. bxc5 Bxe4 18. Bd6 Bg6 19. Qxd4 bxc5 20. Bxc5 Qxd4+ 21. Bxd4 Rfd8 22. Be3 a6 23. Kf2 Rac8 24. Rfc1 Rc6 25. Ke1 h6 26. Kd2 Bf5 27. Rab1 Kf8 28. Rb6 Rxb6 29. Bxb6 Rb8 30. Rb1 Ke8 31. Rb4 Kd7 32. c4 Kc6 33. Be3 Rb7 34. Rxb7 Kxb7 35. d4 Be4 36. g3 h5 37. d5 |
| ECO C89 in 1972 play it! nielsen j defeats black's necesany z in 117 moves | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Nb8 10. d4 Nbd7 11. Nbd2 Bb7 12. Bc2 Re8 13. Nf1 Bf8 14. Ng3 g6 15. a4 c5 16. d5 h6 17. Be3 Qc7 18. Nh2 Bg7 19. h4 c4 20. h5 Kh7 21. Ng4 Nxh5 22. Nxh5 gxh5 23. Nxh6 Nf6 24. Nf5 Ng4 25. Ng3 Qe7 26. Qf3 Qf6 27. Nxh5 Qxf3 28. gxf3 Nxe3 29. fxe3 Kg6 30. Ng3 Rh8 31. Kg2 Bc8 32. axb5 Bh3+ 33. Kf2 axb5 34. Ne2 Bd7 35. Rxa8 Rxa8 36. b3 Ra2 37. Bb1 Rb2 38. Rg1+ Kh7 39. b4 Bf6 40. f4 Kh6 41. Kf3 exf4 42. exf4 Rb3 43. Rc1 Kg7 44. Ke3 Kf8 45. Nd4 Ra3 46. Kd2 Bg7 47. Re1 Bh6 48. Rf1 Ra1 49. Kc1 Ke7 50. Kb2 Ra8 51. e5 Bg7 52. Re1 Kf8 53. Bf5 Bxf5 54. Nxf5 dxe5 55. fxe5 Re8 56. d6 Rd8 57. Nd4 Ke8 58. Nxb5 Kd7 59. Na3 |
| ECO C27 in 1964 play it! nielsen j defeats black's llorens r in 77 moves | 1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 4. Qh5 Nd6 5. Bb3 Nc6 6. Nb5 g6 7. Qf3 f5 8. Qd5 Qe7 9. Nxc7+ Kd8 10. Nxa8 b6 11. d3 Bb7 12. h4 f4 13. Qf3 Nd4 14. Qg4 Bh6 15. Nh3 N6f5 16. Ng5 d5 17. c3 Nb5 18. Bd2 Bxa8 19. O-O-O Re8 20. Rhe1 Qc7 21. Kb1 Bf8 22. d4 h5 23. Qe2 a6 24. Bxf4 Kc8 25. Bxe5 Qd7 26. g3 Bc6 27. Qd3 Kb7 28. Bf4 Nbd6 29. Rxe8 Qxe8 30. Qd2 Bg7 31. Re1 Qd7 32. Qe2 Nc8 33. Qe6 Nce7 34. Qxd7+ Bxd7 35. Ne6 Bf6 36. Be5 Bxe5 37. Rxe5 Bxe6 38. Rxe6 Kc7 39. Bc2 |
| ECO C27 in 1965 play it! nielsen j defeats black's ericson a by checkmate in 75 moves | 1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 4. Qh5 Nd6 5. Bb3 Be7 6. Nf3 O-O 7. Nxe5 Bf6 8. O-O g6 9. Qe2 Re8 10. f4 Nc6 11. Qf2 Rf8 12. d4 Nf5 13. Ne2 Na5 14. g4 Nxb3 15. axb3 Ng7 16. f5 d6 17. Nf3 gxf5 18. g5 Be7 19. Bf4 f6 20. Qh4 Qe8 21. Nc3 Ne6 22. Nd5 Nxf4 23. Nxf4 Qf7 24. Kh1 fxg5 25. Nxg5 Bd7 26. d5 Qg7 27. Rg1 Kh8 28. Rae1 Bf6 29. Qh5 Be8 30. Rxe8 Rfxe8 31. Nf7+ Kg8 32. Rxg7+ Kxg7 33. Ne6+ Kg8 34. Qxf5 Bxb2 35. Nh6+ Kh8 36. Qf7 a5 37. Qg8+ Rxg8 38. Nf7# |
| ECO C27 in 1965 play it! nielsen j defeats black's altshuler roman in 73 moves | 1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 4. Qh5 Nd6 5. Bb3 Nc6 6. Nb5 g6 7. Qf3 f5 8. Qd5 Qe7 9. Nxc7+ Kd8 10. Nxa8 b6 11. d3 Bb7 12. h4 f4 13. Qf3 Nd4 14. Qg4 Bh6 15. Nh3 N6f5 16. Ng5 Bxg5 17. hxg5 f3 18. g3 e4 19. Be3 Nxe3 20. fxe3 f2+ 21. Kf1 Nf3 22. Qf4 d6 23. Qf6 Nd2+ 24. Ke2 Qxf6 25. gxf6 Nxb3 26. axb3 exd3+ 27. cxd3 Bxh1 28. Rxh1 Kd7 29. g4 h5 30. gxh5 gxh5 31. e4 Rxa8 32. Rxh5 Ke6 33. Rf5 Kf7 34. Rxf2 Rh8 35. b4 Rh5 36. Ke3 Rb5 37. Kd4 |
| ECO C27 in 1961 play it! nielsen j defeats black's weiss w in 107 moves | 1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 4. Qh5 Nd6 5. Bb3 Nc6 6. Nb5 g6 7. Qf3 f5 8. Qd5 Qe7 9. Nxc7+ Kd8 10. Nxa8 b6 11. d3 Bb7 12. h4 f4 13. Nxb6 axb6 14. Qf3 Nd4 15. Qh3 Bh6 16. Ne2 Nxe2 17. Kxe2 f3+ 18. gxf3 Bxc1 19. Raxc1 Rf8 20. Rhg1 Rf4 21. Rce1 Nf5 22. Kd1 Nxh4 23. Re3 Nxf3 24. Rg3 Nd4 25. Qh2 Nf5 26. Re1 Nh4 27. c3 Bf3+ 28. Rxf3 Nxf3 29. Qxf4 exf4 30. Rxe7 Kxe7 31. Bd5 Ng5 32. a4 Kd6 33. Bh1 h5 34. b4 Ne6 35. Be4 g5 36. Bg6 Ng7 37. f3 Kc6 38. Ke2 d6 39. Kf2 Kc7 40. c4 Kb8 41. d4 Kc7 42. d5 Kb7 43. Ke2 Kc7 44. Kd2 Kb7 45. Kd3 Kc7 46. a5 bxa5 47. bxa5 Kb7 48. c5 dxc5 49. d6 Kc6 50. a6 Ne6 51. Bxh5 Kxd6 52. a7 Nc7 53. Bg6 Ke5 54. Kc4 |