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Subject: Re: A possible DB analysis move

Author: Slater Wold

Date: 17:40:58 07/23/02

Go up one level in this thread


On July 23, 2002 at 20:10:07, Slater Wold wrote:

>On July 23, 2002 at 19:44:28, Dann Corbit 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)
>>
>>I wonder how long until it hits 2.5 pawns?
>
>I ran it again with 256MB hash and for some reason it locked up.  (25+ minutes
>without an update.)
>
>I am running it again.
>
>I would suspect it will fail high a few more times, and hit 2.5+ in about 30
>minutes.  After Ra3 it should be fairly easy.  (Which DJ7 has found.)

Well...after like 40 minutes, it still has not updated.  Not sure what it's
doing.  But I know it's failing high.



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