Author: Marc Plum
Date: 15:15:41 05/27/99
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Good question. This reminds me of an interesting example of such a draw, involving a queen sacrifice. I am not certain if this is exactly what you had in mind, since it is still possible, though not likely, for Black to make moves that would lose from the final position. However, it involves a locked pawn chain, which assures the draw with reasonable play. Note that the player of White here was not the late world champion, Petrosyan. [Event "Schilde"] [Site "Schilde"] [Date "1970.??.??"] [Round "?"] [White "A. Petrosyan"] [Black "Hasaj"] [Result "1/2-1/2"] [ECO "E80"] [PlyCount "110"] [EventDate "1970.??.??"] 1. c4 g6 2. Nc3 Bg7 3. d4 Nf6 4. e4 d6 5. f3 e5 6. d5 Na6 7. Be3 Nh5 8. Qd2 Qh4+ 9. Bf2 Qe7 10. O-O-O O-O 11. Be3 f5 12. Bd3 f4 13. Bf2 Bf6 14. Nge2 Bh4 15. Bg1 Bd7 16. Kb1 b6 17. Nc1 Nc5 18. Bc2 a5 19. Bxc5 bxc5 20. Ba4 Bxa4 21. Nxa4 Rfb8 22. Qc2 Kh8 23. Rd3 Rb4 24. Ra3 Qe8 25. Nd3 g5 26. h3 Nf6 27. Rc1 Kg7 28. b3 Nd7 29. Qd2 Rb7 30. Ndb2 Nb6 31. Ka1 h5 32. Nd1 Nxa4 33. Rxa4 Rb4 34. Nc3 Qc8 35. Nb5 Bg3 36. Qe2 Kf6 37. Rb1 Ke7 38. a3 Rxa4 39. bxa4 Kd8 40. Nc3 Rb8 41. Rb5 Rxb5 42. axb5 Qa8 43. Na4 Qa7 44. Ka2 Kc8 45. Qb2 Qb6 46. Nxb6+ cxb6 47. h4 gxh4 48. Qd2 h3 49. gxh3 h4 50. Kb3 Kb7 51. Ka4 Ka7 52. Qg2 Kb7 53. Qb2 Ka7 54. Qc2 Kb7 55. Qc3 Ka7 1/2-1/2 When I have Fritz look at the final position, it does not show an even evaluation in any amount of time that I have let it run (I think about 30 minutes max.). If I remember tonight, I will set up the position on Hiarcs 7.01 before I go to bed, and let it mull it over overnight. I would be astonished, pleasantly so, if it shows that the position is drawn by morning. Even a class C player would quickly understand the drawing potential of the Queen sacrifice on move 45, although he might miss White's try 47 h4, and the response 48 . . . h3. If computers, even the best ones, can understand this, then they have obviously improved more than I think. Marc On May 27, 1999 at 11:32:55, KarinsDad wrote: >The thought occurred to me that there are positions which are drawn due to >massive pawn chains that prevent either king from entering into the opponent's >position and hence, prevent any improvement for either side. > >Granted, positions like these (and I do not have an example) will result in an >eventual draw by repetition or draw by 50 move rule, however, I was curious >whether any of the chess programs detect a draw way before this occurs. > >Does anyone have any information on this for any program? > >Thanks, > >KarinsDad :)
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