1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. d4 O-O 5. O-O d6 6. Nbd2 Nc6 7. c3 e5 8. dxe5 dxe5 9. Qc2 Qe7 10. e4 Be6 11. b4 Nd7 12. a4 Rfd8 13. Re1 Nb6 14. Bf1 Bg4 15. h3 Bxf3 16. Nxf3 Rd7 17. Be3 Rad8 18. a5 Nc8 19. h4 Qf6?

Losing an exchange for no particular reason, though Black's position was grim anyway.

20. Bg5 Qe6 21. Bxd8 Rxd8 22. Red1 Rf8 23. Qa2 Qf6 24. Kg2 Nd6 25. Qe2 a6 26. Qe3 h6 27. Rd5 Ra8 28. Ne1 Nd8 29. Rad1 Bf8 30. Be2 Kh7 31. Bg4 h5 32. Be2 Bh6 33. Qf3 Qe6 34. Nd3 Bg7 35. Nb2 f6 36. Nc4 N6f7 37. Ne3 Bf8 38. Bc4 Qc6 39. Rd7 Kg7 40. R7d3 Nd6 41. Bd5 Qb5 42. g4 hxg4 43. Nxg4 Be7 44. Rh1 N8f7 45. Rdd1 Rh8 46. Ne3 Rh5 47. Be6 c6 48. Bg4 Rh8 49. Rh3 b6 50. axb6 Qxb6 51. Rg1 a5 52. bxa5 Qxa5 53. Kh2 Kf8 54. Be6 Rg8 55. Ng4 Kg7 56. h5??

56. Nxf6! Bxf6 57. h5 wins, e.g., 57... Be7 58. hxg6 Nh6 59. Qf7+! .

56... Ng5 57. h6+ Kh8 58. Qg3?

The final mistake: after 58. Bxg8! White is still in the game, e.g., 58... Nxf3+ 59. Rxf3 Kxg8 60. Nxf6+=.

58... Nxe6 59. Rd1 Nf4 60. Rh4 g5 61. Rh3 Nxh3 62. Qxh3 Qa4 63. Rb1 Qxe4 64. Ra1

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Source(s): Jonathan O'Connor games collection.

Reference(s): Daly-O'Connor, Irish championship qualifier 1986, IRLchess, August 7, 2016.

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