Author: Robert Hyatt
Date: 09:21:24 05/31/04
Go up one level in this thread
On May 31, 2004 at 07:20:39, Uri Blass wrote:
>On May 30, 2004 at 23:48:26, Mike Byrne wrote:
>
>>This is semi-follow up to Jorge post regardng Game 6 of the first match between
>>Kasparov and Deep Blue , but not directly so I started a new thread.
>>
>>I witness this game live in Philadelphia with my brother-in-law. If anybody is
>>interested in a program from the match . e-mail me privately. There was
>>laughter after Nh5, it certainly did look like a computer move at the time..
>>
>>Annotations Copyright by Chessbase
>>
>>[Event "Philadelphia m"]
>>[Site "Philadelphia"]
>>[Date "1996.02.17"]
>>[Round "6"]
>>[White "Kasparov, Garry"]
>>[Black "Comp Deep Blue"]
>>[Result "1-0"]
>>[ECO "D30"]
>>[WhiteElo "2795"]
>>[Annotator "Friedel"]
>>[PlyCount "85"]
>>[EventDate "1996.02.??"]
>>[Source "ChessBase"]
>>
>>1. Nf3 {Keene Borik} d5 2. d4 c6 3. c4 e6 4. Nbd2 Nf6 5. e3 c5 {a tempo-losing
>>move to deviate from game four. The Deep Blue team has prepared a line that
>>should open up the position.} 6. b3 Nc6 7. Bb2 cxd4 8. exd4 Be7 9. Rc1 O-O 10.
>>Bd3 Bd7 11. O-O Nh5 $2 {
>>A very strange move which absolutely nobody at the site liked.} 12. Re1 Nf4 13.
>>Bb1 Bd6 14. g3 Ng6 15. Ne5 Rc8 16. Nxd7 Qxd7 17. Nf3 Bb4 18. Re3 Rfd8 19. h4
>>Nge7 20. a3 Ba5 21. b4 Bc7 22. c5 {Four consecutive pawn advances which drive
>>back all the black pieces, which are stumbling over each other on the
>>queenside.} Re8 23. Qd3 g6 24. Re2 Nf5 25. Bc3 h5 26. b5 {Keene calls this
>>"Kasparov's strategy of strangulation" and points out that 26.b5 doesn't just
>>attack the knight but establishes "a giant, crawling mass of white pawns,
>>rather resembling a colossal army of soldier ants on the move."} Nce7 27. Bd2
>>Kg7 28. a4 Ra8 29. a5 a6 30. b6 Bb8 {# Kasparov has shut the black bishop and
>>rook out of play to the end of the game. Black's position is lost.} 31. Bc2 Nc6
>>32. Ba4 Re7 33. Bc3 Ne5 {actually accelerating the end.} 34. dxe5 Qxa4 35. Nd4
>>Nxd4 36. Qxd4 Qd7 {IM Otto Borik that other variations also lose:} (36... Qxd4
>>37. Bxd4 {and Rb2, c6 wins, e.g.} Re8 38. Rb2 Rc8 39. c6 Rxc6 40. Rxc6 bxc6 41.
>>b7 Ra7 42. Bxa7 Bxa7 43. b8=Q Bxb8 44. Rxb8) (36... Qc6 37. Bd2 Rd7 38. Bg5 Kf8
>>39. Bf6 {and now f3, Rg2 and g4 wins.}) 37. Bd2 Re8 38. Bg5 Rc8 39. Bf6+ Kh7
>>40. c6 $1 bxc6 (40... Rxc6 41. Rec2 Rxc2 42. Rxc2 Qe8 43. Qc5 {wins}) 41. Qc5
>>Kh6 42. Rb2 Qb7 43. Rb4 $1 {And the Deep Blue team reseigned for the machine.
>>Why did Black resign? IM Malcolm Pein explained this on the Internet: "Black
>>has four pieces left plus his king. The rook on a8 and the bishop on b8 cannot
>>move. If the queen on b7 moves it allows b7, winning a rook. If the rook on
>>c8 moves White can play Qxc6, forcing an exchange of queens. After that there
>>are many ways to win, the most prosaic being double on the c file and play Rc8.
>>So we are left with Kh7! The simplest way then is Qe7 Qxe7 Bxe7 threatening b7
>>and if Rc8-e8 then b7 Ra7 Bc5 etc. Note that had Kasparov left his rook on b2
>>Black would have ...Bxe5 gaining a tempo."} (43. Rb4 Qd7 (43... Re8 44. Qxc6
>>Qxc6 45. Rxc6 Kh7 46. b7 Ra7 47. Rbb6 Rg8 48. Rc8 d4 49. Rbc6 g5 (49... d3 50.
>>Rxg8 Kxg8 51. Rc8+ Kh7 52. Rh8#) 50. Rxg8 Kxg8 51. Rc8+ Kh7 52. Rh8+ Kg6 53.
>>Rg8+ Kf5 54. f3 {Threat: Rxg5#} Bxe5 55. Bxe5 {Threat: ditto} Kxe5 56. b8=Q+ {
>>and mate.}) (43... Kh7 44. Qe7 Qxe7 45. Bxe7 Re8 46. b7 Ra7 47. Bc5 Rd8 48.
>>Bxa7 Bxa7 49. Rxc6 Bb8 50. Rc8 {winning}) 44. b7) 1-0
>>
>>[d]2rr2k1/pp1qnppp/2n1p3/3p4/1bPP3P/1P2RNP1/PB3P2/1BRQ2K1 w - - 0 20
>>
>>There was much disussion in the audience about 20.Bxh7! - Yasser indicating
>>that against a human , Kasparov most definitely would have played that move.
>>After the game, Kasparov indicated as such - but he did not play it because he
>>saw no reason to take the chance against Deep Blue. He was confident that he
>>had a "won" game at this point and the was no reason to take unnecceary risks.
>>Hsu also confirmed later that Deep Blue also like Bxh7 as the best move and it
>>saw white with a winning score.
>
>
>I remember that I read that it saw only a draw score for that move.
>I never read that it saw winning score for Bxh7.
>
>Where did you read about the claim that deep blue saw Bxh7 with a winning score.
>
>Uri
I talked to Hsu right after the match ended. His comment to me then was "DB saw
Bxh7+ led to a repetition. But after a3, and making the bishop move, Bxh7+
became a real threat to win."
That's all I really remember, but he definitely said DB was expecting Bxh7 and
was showing a draw score at that point....
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