One of these sets of Chess moves represents a match between two human agents; the other has at least one machine agent as a player.

a) 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Bc5 5.Bxc6 dxc6 6. Nbd2 Bg4 7. h3 Bh5 8. Nf1 Nd7 9. Ng3 Bxf3 10. Qxf3 g6 11. Be3 Qe7 12. 0-0-0 0-0-0 13. Ne2 Rhe8 14. Kb1 b6 15. h4 Kb7 16. h5 Bxe3 17. Qxe3 Nc5 18. hxg6 hxg6 19. g3 a5 20. Rh7 Rh8 21. Rdh1 Rxh7 22. Rxh7 Qf6 23. f4 Rh8 24. Rxh8 Qxh8 25. fxe5 Qxe5 26. Qf3 f5 27. exf5 gxf5 28. c3 Ne6 29. Kc2 (diagram) Ng5 30. Qf2 Ne6 31. Qf3 Ng5 32. Qf2 Ne6 ½–½

b) 1. Nf3 Nf6 2. d4 e6 3. c4 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. d5 exd5 8. Nh4 c6 9. cxd5 Nxd5 10. Nf5 Nc7 11. e4 d5 12. exd5 Nxd5 13. Nc3 Nxc3 14. Qg4 g6 15. Nh6+ Kg7 16. bxc3 Bc8 17. Qf4 Qd6 18. Qa4 g5 19. Re1 Kxh6 20. h4 f6 21. Be3 Bf5 22. Rad1 Qa3 23. Qc4 b5 24. hxg5+ fxg5 25. Qh4+ Kg6 26. Qh1 Kg7 27. Be4 Bg6 28. Bxg6 hxg6 29. Qh3 Bf6 30. Kg2 Qxa2 31. Rh1 Qg8 32. c4 Re8 33. Bd4 Bxd4 34. Rxd4 Rd8 35. Rxd8 Qxd8 36. Qe6 Nd7 37. Rd1 Nc5 38. Rxd8 Nxe6 39. Rxa8 Kf6 40. cxb5 cxb5 41. Kf3 Nd4+ 42. Ke4 Nc6 43. Rc8 Ne7 44. Rb8 Nf5 45. g4 Nh6 46. f3 Nf7 47. Ra8 Nd6+ 48. Kd5 Nc4 49. Rxa7 Ne3+ 50. Ke4 Nc4 51. Ra6+ Kg7 52. Rc6 Kf7 53. Rc5 Ke6 54. Rxg5 Kf6 55. Rc5 g5 56. Kd4 1-0

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