[Event "1986 World Open"]  [White "Viswanathan Anand"]  [Black "Leonid Bass"]  [Result "1-0"]  [ECO "B10"]  [WhiteElo "2405"]  [BlackElo "2460"]  [Annotator "ATH"]  [PlyCount "101"]  [EventDate "1986.07.??"]  [EventType "swiss"]  [EventRounds "9"]  [EventCountry "USA"]  [SourceTitle "CL, Oct 1986"]  [SourceDate "2019.05.21"]  [SourceVersion "1"]  [SourceVersionDate "2019.05.21"]  [SourceQuality "1"]   1. e4 c6 2. c4 d5 3. exd5 cxd5 (3... Nf6 $5) 4. cxd5 Qxd5 (4... Nf6 $1 5. Bb5+  Nbd7 6. Nc3 a6 7. Bxd7+ Qxd7 8. Nf3 Nxd5 9. O-O f6 10. d4 e6 $11) 5. Nc3 Qd6 6.  d4 e6 7. g3 (7. Bd3 $5) 7... Nc6 (7... Nf6 $1 $11) 8. Nge2 (8. Nf3 $1) 8... Nf6  9. Bg2 Be7 10. O-O (10. Bf4 $5) 10... O-O 11. Bf4 Qd7 (11... Qd8 12. a3 $14)  12. Rc1 Rd8 13. Qd2 (13. Qa4 $1 Nb4 14. Qxd7 Rxd7 $11) 13... b6 (13... Nxd4 $2  14. Nxd4 Qxd4 15. Qxd4 Rxd4 16. Nb5 $16) (13... e5 $5 14. Bxc6 Qxc6 15. Bxe5  Bh3 16. Nf4 Bxf1 17. Ncd5 Qd7 (17... Qe8 18. Bxf6 Bxf6 19. Nxf6+ gxf6 20. Rxf1  $44) 18. Rc7 Nxd5 19. Rxd7 Rxd7 20. Nxd5 Rxd5 21. Kxf1 $11) 14. Rfd1 Bb7 (14...  Ba6 $5 $11) 15. d5 exd5 16. Nxd5 Nxd5 17. Qxd5 Qxd5 18. Rxd5 Rxd5 19. Bxd5 Rc8  20. Kg2 (20. Nc3 Nd8 $11) 20... Nd8 (20... Ba6 $1 $11) 21. Rxc8 Bxc8 22. Bb8 a6  23. Nc3 (23. Ba7 b5 $11) 23... Bf6 (23... b5 24. Kf3 Kf8 $11) 24. Bc7 (24. Kf3  $1 b5 25. Ke4 Be7 26. a3 Kf8 27. b4 Ke8 $11) 24... b5 25. Ne4 Be7 26. Kf3 Ne6  27. Be5 Nc5 $2 (27... f6 28. Bb8 Bd7 29. Ke3 Kf8 $11) 28. Bd6 Bxd6 (28... Nxe4  29. Bxe7 Nd2+ 30. Kf4 $16 {is slightly better}) 29. Nxd6 (29. Bxf7+ $2 Kxf7 30.  Nxd6+ Ke6 31. Nxc8 Nd3 $15) 29... Be6 30. Bxe6 fxe6 (30... Nxe6 $6 31. Ke4 Ng5+  32. Kd5 $18) 31. Ke3 Na4 (31... e5 32. b4 $18 {is a bit better}) 32. b3 Nc3 (  32... Nb6 {is too small an improvement to make any difference}) 33. a3 Nb1 $6 (  33... Kf8 34. Ne4 Nd5+ 35. Kd4 $18) 34. a4 bxa4 35. bxa4 Nc3 36. a5 Kf8 (36...  Nd1+ {is an irrelevant improvement}) 37. Kd4 Nd5 38. Kc5 Ke7 ({So is} 38... g6)  39. Nc8+ $6 (39. Nf5+ $18 {is the quick method}) 39... Kd8 40. Nb6 Nc3 $2 (  40... Nf6 41. Kc6 Ng4 {offers more resistance}) 41. Kc6 g5 (41... Nb5 {is a  small, but futile improvement}) 42. Nc4 $6 (42. Nd7 {is better}) 42... g4 43.  Ne5 h5 44. Nd3 Ne4 (44... Kc8 {is another irrelevant improvement. Black is  burnt toast (and has been for some time)}) 45. Kb6 $2 (45. Nb4 $1 {'s  evaluation by Stockfish is double that of the text (not that it matters--it  doesn't)}) 45... Kd7 46. Kxa6 $6 ({Again} 46. Nb4 {is a lot better than the  text but, again, it doesn't matter}) 46... Kc6 47. Ka7 Kc7 48. Nf4 e5 49. Ne6+  Kd6 $2 (49... Kc6 50. a6 Nf6 51. Kb8 Nd7+ 52. Kc8 Nb6+ 53. Kd8 Nc4 54. Ng7 $18  {would prolong the game without changing the result}) 50. a6 Nc3 51. Kb6 1-0