Author: Robert Hyatt
Date: 21:17:05 07/23/02
Go up one level in this thread
On July 23, 2002 at 23:45:30, Miguel A. Ballicora wrote: >On July 23, 2002 at 21:12:05, Robert Hyatt wrote: > >>On July 23, 2002 at 19:41:40, Slater Wold 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... >>> >>>The fastest, and highest score I get in 10 minutes is from, BIG SURPRISE, DJ7. >>> >>>Deep Junior 7 - W,S >>>r1b1r1k1/1q3ppp/ppn5/2bNp3/P4B2/5Q1P/BP3PP1/R2R2K1 w - - 0 1 >>> >>>Analysis by Deep Junior 7: >>> >>>1.Bh2 e4 2.Qf4 >>> ³ (-0.41) Depth: 3 00:00:00 >>>1.Bd2 e4 2.Qg3 Kh8 3.Qf4 >>> ³ (-0.30) Depth: 6 00:00:00 5kN >>>1.Bd2 e4 2.Qg3 Kh8 3.Qf4 >>> ³ (-0.30) Depth: 6 00:00:00 5kN >>>1.Bd2 e4 2.Qg3 Kh8 3.Qf4 >>> ³ (-0.30) Depth: 6 00:00:00 5kN >>>1.Bd2 e4 2.Qg3 Kh8 3.Qf4 >>> ³ (-0.30) Depth: 6 00:00:00 5kN >>>1.Bg5 Nd4 2.Qe4 Qc6 3.Rac1 >>> ³ (-0.27) Depth: 6 00:00:00 19kN >>>1.Bg5 Be6 2.Bb1 Rac8 3.Qd3 Bxd5 >>> ³ (-0.45) Depth: 9 00:00:00 228kN >>>1.Bd2 Be6 2.Qg3 Kh8 3.Qd3 Rad8 >>> ³ (-0.43) Depth: 9 00:00:00 233kN >>>1.Bh2 Bd4 2.Rac1 e4 3.Qb3 Bf5 >>> ³ (-0.34) Depth: 9 00:00:00 338kN >>>1.Bg3 Bd4 2.Nc3 Be6 3.Bxe6 Rxe6 >>> = (-0.16) Depth: 9 00:00:00 501kN >>>1.Bh6 Re6 2.Be3 Nd4 3.Qh5 g6 4.Qh6 Nf5 5.Qg5 Nxe3 >>> = (-0.06) Depth: 9 00:00:00 819kN >>>1.Bh6 Re6 2.Be3 Nd4 3.Bxd4 Bxd4 4.Rac1 e4 5.Qe2 Bc5 6.Qc4 >>> = (-0.17) Depth: 12 00:00:01 2649kN >>>1.Nf6+! >>> = (0.24) Depth: 12 00:00:02 5827kN >>>1.Nf6+! >>> ² (0.54) Depth: 15 00:00:07 18172kN >>>1.Nf6+! gxf6 2.Bd5 Bd7 3.Bh6 Bf8 4.Qxf6 Re6 5.Bxe6 Bxe6 6.Rd3 Ne7 7.Bxf8 Rxf8 >>>8.Rg3+ >>> ² (0.56) Depth: 15 00:00:17 38549kN >>>1.Nf6+ gxf6 2.Bh6 Bf8 3.Bd5 Bd7 4.Qxf6 >>> ² (0.58) Depth: 17 00:01:28 199636kN >>>1.Nf6+ gxf6 2.Bh6 Bf8 3.Bd5 Bd7 4.Bxf8 Kxf8 5.Qxf6 Re6 6.Bxe6 Bxe6 7.Ra3 >>> ² (0.60) Depth: 18 00:04:04 560089kN >>>1.Nf6+ gxf6 2.Bh6 Bf8 3.Bd5 Bd7 4.Bxf8 Kxf8 5.Qxf6 Re6 6.Bxe6 Bxe6 7.Ra3 >>> ² (0.60) Depth: 18 00:07:13 999089kN >>> >>>(W, 23.07.2002) >> >> >>Unfortunately the score is not yet right. Let it compute until it sees a >>big material win. That will give us a good time to compare to DB Jr... > >What was DB's time? > >Miguel It found it almost instantly. But it didn't get +2.5 until just under the two minute mark. I will try to post the analysis as soon as I find the email, if I still have it... Crafty used to find this fairly quickly, but with the wrong score. If a computer feels black is winning it might find Nf6+ more quickly by finding the repetition first, which is what happened to me in the KKUP tourney... I think we reached depth=16 on this position. It is also possible that the Crafty analysis and the DB Jr analysis is still lying around in DejaNews as I remember posting both. I first posted Crafty's analysis (I was not running crafty in any of the games but I set up the position when KK posted "Crafty unleashes a stunning sac against ChessMaster". I set up the position and ran for 8 hours on my P6/200 and posted the analysis with the note "it sees a repetition, not a big win." I later (after hearing from Hsu) posted his analysis as well).
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