Computer Chess Club Archives




Subject: LCT II Fin4, Deep Thought, and Deep Blue (was Re: LCT II results...)

Author: Albert Silver

Date: 09:28:18 01/05/98

Go up one level in this thread

On January 05, 1998 at 02:52:50, Howard Exner wrote:

>On January 05, 1998 at 01:54:04, Bruce Moreland wrote:
>>On January 05, 1998 at 00:37:50, Howard Exner wrote:
>>>I have the text for this game and the correct move is h3. Play continues
>>>Rxh6  a3  2. Rxh3 Ra4 3. Rh1  a2 4. Ra1 Ke7   is drawn. In the actual
>>>Deep thought played h5? and karpov went on to win (Karpov-Deep
>>ICCAJ, Mar '90, p. 37-40.
>>Why did DT blow this position?
>I was wondering about that also. I thought even back then that its
>node per second count was higher than today's fastest machines/programs.
>Here is the entire game for those who would like to look at the finish.
>[Event ""]
>[Site "Harvard"]
>[Date "1990.01.01"]
>[Round ""]
>[White "Karpov Anatoly"]
>[Black "COMP Deep Thought"]
>[Result "1-0"]
>[BlackElo ""]
>[WhiteElo ""]
>[ECO ""]
>1. e4 c6 2. d4 d5 3. Nd2 g6 4. c3 Bg7 5. e5 f6 6. f4 Nh6 7. Ngf3 O-O 8.
>Be2 fxe5 9. fxe5 c5 10. Nb3 cxd4 11. cxd4 Nc6 12. O-O Qb6 13. Kh1 a5 14.
>a4 Bf5 15. Bg5 Be4 16. Nc5 Qxb2 17. Nxe4 dxe4 18. Rb1 Qa3 19. Bc1 Qc3
>Bd2 Qa3 21. Bc1 Qc3 22. Rb3 Qa1 23. Bc4+ Kh8 24. Bxh6 Qxd1 25. Bxg7+
>26. Rxd1 exf3 27. gxf3 Ra7 28. Bd5 Rd8 29. Rb5 Ra6 30. Be4 Ra7 31. Bd5
>Ra6 32. Rc5 Rd7 33. Kg2 Rb6 34. Bxc6 bxc6 35. Kf2 Rd5 36. Rxd5 cxd5 37.
>Rc1 Rb4 38. Ke3 Rxa4 39. Rc5 e6 40. Rc7+ Kg8 41. Re7 Ra3+ 42. Kf4 Rd3
>Rxe6 Rxd4+ 44. Kg5 Kf7 45. Ra6 a4 46. f4 h6+ 47. Kg4 Rc4 48. h4 Rd4 49.
>Rf6+ Kg7 50. Ra6 Kf7 51. h5 gxh5+ 52. Kf5 Kg7 53. Ra7+ Kf8 54. e6 Re4
>Rd7 Rc4 56. Rxd5 h4 57. Rd3 Ke7 58. Rd7+ Kf8 59. Rh7 h5 60. Ke5 h3 61.
>f5 Kg8 62. Rxh5 a3 63. Rxh3 a2 64. Ra3 Rc5+ 65. Kf6 1-0
>The Louguet 2 endgame #4 picks up on move 59.

Of course it is strange, but maybe not. A few things come to mind
regarding it and even Deep Blue as long as we're at it. Deep Thought was
already so fast that it was thought (perhaps not by all, but certainly
by many) to be able to literally "solve" such a position, yet obviously
it couldn't. I don't know if it's so strange. I remember Kasparov's
crushing 25 mover against it in a 25-minute game, a time control that
should have been to DT's utmost advantage, and yet it's tactics betrayed
it. Knowledge is obviously important in evaluating the positions, but
back then it was believed (Bob, feel free to tell me I'm talking out of
my a** if I'm dead wrong) that this could be overcome by sheer
brute-force. Even when I look at Deep Blue's games against Kasparov one
is left with a strange impression. Sure, it found some brilliant moves
(but then with that kind of computing power, that should surprise no
one), but there were also not only the very strange moves (plenty to
mention, like that queen swap Qxg6 in one game - Don't remember which
exactly right off hand), but also that incredible opportunity it gave
Kasparov in game two. So much attention has been given to the fact that
Kasparov missed it, that the fact that Deep Blue allowed it has been
almost overlooked. How on earth could it not see it? Especially with the
depth of calculation it was wielding. I have heard many, many times on
how smart Deep Blue is. On just how much knowledge it has on the game.
But there is more to it than just the 'amount' of knowledge, and I'm not
simply referring to quality, there is also the matter of administering
it. Just knowing all the factors that constitute a position doesn't mean
that I will automatically choose the correct ones to judge it and
subsequently choose my move. There are several programs out there that
are touted for having a vast knowledge of the game. I remember how
Vincent Diepeveen proclaimed (I'm probably going to get lynched for
this) that because his program Diep was seriously weighted down by all
of it's understanding of the game it couldn't compete properly at normal
time controls, but that it was quite probably the world champion in
postal chess. Brave words that weren't confirmed by crushing results
over all of it's rivals in last year's KK tournament. Even if DB's
program WERE released, tuned especially for a microprocessor, I honestly
don't believe it would be Numero Uno. Anyhow, it looks like I've drifted
quite a ways from the original subject. So much so that I've changed the
header so that it isn't thought I'm writing this while completely drunk.


This page took 0.28 seconds to execute

Last modified: Thu, 15 Apr 21 08:11:13 -0700

Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.