Author: Robin Smith
Date: 00:30:04 07/02/99
Go up one level in this thread
On July 01, 1999 at 23:49:48, Ted Sutton wrote:
>Robin,
> Thanks for a fascinating post with regard to positions in the 11th USCCC where
>you believe your opponents relied on a computer for a faulty evaluation.
> This would be a very interesting and relevant test case for us,if you would
>care to share several of these positions with us (naturally without names).
>We are dealing here with very strong correspondence play, so can see what of
>errors of positional judgement computers make.
> (I was unaware that computer use is legal in the USCCC, but it is logical,
>since the USCCC is an ICCF sponsored event, and computers are legal under ICCF).
> In view of the fact that computer use was legal in these games, then your
>opponents, assuming they were consulting with computers, were acting ethically
>and legally (though perhaps unwisely), and there is no reason not to disclose
>these positions.
Sure, here are a couple. Of course I don't KNOW how my opponents generated
moves, it's just a theory. Interestingly the errors are more tactical than
positional, but the lines are pretty deep. The 1st one really looks computer
horizon effect. The 2nd game was published in the November 1998 Chess. Modern
computers/programs probably do better than at the time these games were played.
[Event "US11F"]
[Date "1995-1998"]
[White "Smith, Robin"]
[Black "Thompson, Paul"]
[Result "1-0"]
[ECO "B89"]
[Annotator "Robin Smith"]
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bc4 e6 7. Be3 Be7 8.
Qe2 a6 9. O-O-O O-O 10. Bb3 Qc7 11. g4 Nxd4 12. Rxd4 Nd7 13. g5 Nc5 14. Rg1 b5
15. e5 dxe5 16. Rh4 Nxb3+ 17. axb3 g6 18. Qf3!? {White gambles on a strong
sacrificial attack that should be a draw with correct defense by Black.} Bb7 19.
Qh3 h5 20. Rxh5 gxh5 21.Qxh5 Bf3??
Black is now lost. Computers like this move because, being up a whole rook,
they don't like to settle for a draw. 21... Bc5! is the only move after which
22. Bxc5 Qxc5 23. g6 Kg7!=draw
The game continued 22. Qh6! Ba3 (22... Bc5 23. Bxc5 Qxc5 24. g6 and White mates
in 3, since Black can no longer play Kg7.) 23. g6 f5 24. g7 1-0
[Event "US11F"]
[Date "1995-1998"]
[White "Smith, Robin"]
[Black "Biedermann, Thomas"]
[Result "1-0"]
[ECO "B80"]
[Annotator "Robin Smith"]
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e6 7. Qd2 b5 8. f3
Bb7 9. g4 h6 10. O-O-O Nbd7 11. h4 b4 12. Nce2 d5 13. Bh3 dxe4 14. g5 hxg5 15.
hxg5 exf3 16. Nf4 Ne4 17. Qe1 f2 18. Bxf2 Qxg5 19. Be3 Qg3?!
Up to now we had been following Anand-Beliavski; Groningen 1993. Here Beliavski
played Qh4 and obtained a difficult but playable game after Anand's 20.Ndxe6!.
Some computers really like 19. ... Qg3 and most computers like blacks position,
which I think is why my opponent allowed it, but I think White has all the
chances.
The game continued:
20. Qe2 Bd6 21. Rhg1 Bxf4 (Qxf4!! might have saved blacks game, other moves give
white an advantage. It's a very complex position, a fun one to work out the
lines.) 22. Rxg3 Nxg3 23. Qf2 Bxe3+ 24. Qxe3 Ne4 25. Bxe6 fxe6 26. Nxe6 Ke7 27.
Qd4 Ndf6 28. Qb6 Rhc8 29. Nxg7 Rab8 30. Nf5+ Kf7 31. Nd6+ Nxd6 32. Qxd6 Bg2 33.
Rd2 Bf3 34. Rf2 Rd8 35. Qc7+ Rd7 36. Qc4+ Bd5 37. Rxf6+ Kxf6 38. Qf4+ Ke6 39.
Qxb8 Rb7 40. Qe8+ Kd6 41. Qg6+ Be6 42. Qd3+ Kc7 43. Qxa6 Rb6 44. Qa7+ Kc6 45. b3
Rb5 46. a3 bxa3 47. Qxa3 Re5 48. Qe7 Re2 49. b4 Re1+ 50. Kd2 Re4 51. b5+ 1-0
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