Author: Dann Corbit
Date: 16:41:37 07/23/02
Go up one level in this thread
On July 23, 2002 at 19:18:15, Pierre Bourget wrote:
>On July 23, 2002 at 18:32:27, Robert Hyatt wrote:
>
>>A few years ago, Komputer Korner had a "correspondence kup" match with Crafty,
>>chessmaster and some other programs, playing a correspondence tournament. In
>>that match, Crafty found a wild sacrifice to play against Chessmaster, I think
>>it was Nf6. After searching for 24 hours or whatever the time limit was, Crafty
>>saw a draw score. And it saw a draw score for the next couple of moves.
>>
>>Right after Crafty played that move, Hsu sent me an email saying "brilliant
>>move". I told him Crafty only saw a draw. He said "let it keep searching...
>>DB Jr saw +2.5 very quickly." Sure enough, a few moves later Crafty realized
>>it was not just drawing, it was winning easily.
>>
>>I will try to find the game. If anybody has it, perhaps _that_ position will
>>be a good one to see how long it takes today's programs to find the move and
>>find it is winning, compared to DB1 back in 1996...
>>
>>I will see what I can find...
>>
>>I think the event was called "the komputer kup korrespondence tournament" or
>>something similar...
>
>I think this is the position:
>
>[D]r1b1r1k1/1q3ppp/ppn5/2bNp3/P4B2/5Q1P/BP3PP1/R2R2K1 w - - 0 19
>
>The gamescore:
>
>[Event "1997 Korrespondence Kup"]
>[Site "?"]
>[Date "1997"]
>[Round "?"]
>[White "Crafty"]
>[Black "CM5000"]
>[Result "1-0"]
>
>1. Nf3 d5 2. d4 Nf6 3. c4 dxc4 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. a4 Nc6 8. Qe2
>Qc7 9. Nc3 Bd6 10. Rd1 O-O 11. h3 Re8 12. dxc5 Bxc5 13. e4 Nd7 14. Ba2 b6 15. e5
>Ndxe5 16. Bf4 Nxf3+ 17. Qxf3 e5 18. Nd5 Qb7 19. Nf6+ gxf6 20. Bh6 Bf8 21. Bd5
>Bd7 22. Ra3 Bxh6 23. Qxf6 Re6 24. Bxe6 Bxe6 25. Rg3+ Kf8 26. Qxh6+ Ke7 27. Qh4+
>Kf8 28. Qxh7 Nd4 29. Qh8+ Ke7 30. Qxe5 Nf5 31. Rc3 Rc8 1-0
Takes Crafty 7 minutes to find the draw score on a 950 MHz Athlon.
Not sure how long until a big gain comes into view:
White(1): epdpfga \cr-cm.epd cr-cm.out
PFGA: EPD record: 1
middle-game phase
clearing hash tables
time surplus 0.00 time limit 16:39 (16:39)
nss depth time score variation (1)
5-> 0.26 -0.48 1. Bg3 Bd4 2. Rd2 e4 3. Qh5
6 0.35 -0.57 1. Bg3 Bd4 2. Nc3 e4 3. Nxe4 Bxb2
6 0.69 -0.28 1. Be3 Bxe3 2. Qxe3 b5 3. Qg5 h6 4.
Nf6+ Kh8
6-> 0.78 -0.28 1. Be3 Bxe3 2. Qxe3 b5 3. Qg5 h6 4.
Nf6+ Kh8
7 1.41 -0.31 1. Be3 Bxe3 2. Qxe3 b5 3. axb5 axb5
4. Qg5 h6 5. Nf6+ Kh8
7-> 2.00 -0.31 1. Be3 Bxe3 2. Qxe3 b5 3. axb5 axb5
4. Qg5 h6 5. Nf6+ Kh8
8 2.94 -0.30 1. Be3 Bxe3 2. Qxe3 b5 3. Qg3 Re6 4.
Bb3 bxa4 5. Rxa4 Rd6
8-> 6.09 -0.30 1. Be3 Bxe3 2. Qxe3 b5 3. Qg3 Re6 4.
Bb3 bxa4 5. Rxa4 Rd6
9 11.13 -0.33 1. Be3 Be6 2. Bxc5 bxc5 3. Rd2 Rab8
4. Qg3 Red8 5. Nf6+ Kh8 6. Rxd8+ Nxd8
7. Bxe6 Nxe6
9-> 25.03 -0.33 1. Be3 Be6 2. Bxc5 bxc5 3. Rd2 Rab8
4. Qg3 Red8 5. Nf6+ Kh8 6. Rxd8+ Nxd8
7. Bxe6 Nxe6
10 42.69 -0.47 1. Be3 Be6 2. Rac1 Bxe3 3. Qxe3 Rac8
4. Qf3 Red8 5. Bb3 Bxd5 6. Bxd5 h6
10 1:34 -0.29 1. Bh6 Re6 2. Be3 Bd4 3. Bc4 Bd7 4.
Rd2 Rc8 5. Rad1 Rd6
10-> 1:53 -0.29 1. Bh6 Re6 2. Be3 Bd4 3. Bc4 Bd7 4.
Rd2 Rc8 5. Rad1 Rd6
11 2:16 -0.30 1. Bh6 Re6 2. Be3 Bd4 3. Bc4 Bd7 4.
Qe4 Bxe3 5. fxe3 Na5 6. Nf6+ Rxf6 7.
Qxb7 Nxb7 8. Rxd7
11-> 4:34 -0.30 1. Bh6 Re6 2. Be3 Bd4 3. Bc4 Bd7 4.
Qe4 Bxe3 5. fxe3 Na5 6. Nf6+ Rxf6 7.
Qxb7 Nxb7 8. Rxd7
12 5:35 -0.37 1. Bh6 Re6 2. Be3 Bd4 3. Bc4 h6 4.
Qe4 Na5 5. Be2 Nb3 6. Ra3 Rd6 7. Rxb3
Qxd5 8. Qxd5 Rxd5 9. Bxd4 exd4 10.
Rxb6
12 6:57 0.00 1. Nf6+ gxf6 2. Bh6 Bf8 3. Bd5 Bd7
4. Qxf6 Re6 5. Bxe6 Bxe6 6. Qg5+ Kh8
7. Bxf8 Rxf8 8. Qf6+ Kg8 9. Qg5+ Kh8
12-> 9:27 0.00 1. Nf6+ gxf6 2. Bh6 Bf8 3. Bd5 Bd7
4. Qxf6 Re6 5. Bxe6 Bxe6 6. Qg5+ Kh8
7. Bxf8 Rxf8 8. Qf6+ Kg8 9. Qg5+ Kh8
13 10:00 1/46* 1. Nf6+
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