Author: Robert Hyatt
Date: 10:10:35 05/31/04
Go up one level in this thread
On May 31, 2004 at 12:36:58, Mike Byrne wrote:
>On May 31, 2004 at 12:21:24, Robert Hyatt wrote:
>
>>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....
>
>My recollection is fuzzy as to when (20.Bxh7+ or 21 Bxh7+) he said Bxh7 was real
>strong at the site - but I can accept that he might have said or meant after 20.
>a3 - bishop move and then 21. Bxh7+!
I only remember the comment he made to me. That Bxh7 where everyone was buzzing
was expected and only a draw, but after a3, white threated Bxh7 for real...
I didn't do any analysis myself...
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