Author: John Merlino
Date: 16:40:59 07/23/02
Go up one level in this thread
On July 23, 2002 at 19:31:10, John Merlino 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... > >Assuming Pierre's position is correct, Chessmaster 9000, on a PIII-600, finds >Nf6+ in 1:16, giving it a drawing score. After 3:15, the score is positive, but >nowhere near "winning". > >Time Depth Score Positions Moves >0:00 1/4 -0.41 11390 19.Bh6 Re6 20.Bg5 Nd4 21.Qd3 >0:00 1/5 -0.64 37849 19.Bh6 Re6 20.Be3 Nd4 21.Bxd4 exd4 >0:01 1/5 -0.46 67804 19.Bg3 Nd4 20.Qe4 Qb8 21.Rac1 Bf5 >0:02 1/6 -0.42 111216 19.Bg3 Nd4 20.Qh5 Be6 21.Bxe5 Bxd5 > 22.Bxd4 >0:04 1/6 -0.37 203824 19.Bh6 Re6 20.Be3 Nd4 21.Bxd4 Bxd4 >0:06 1/7 -0.56 341780 19.Bh6 Re6 20.Be3 Nd4 21.Bxd4 exd4 > 22.Rac1 Re5 >0:13 1/7 -0.52 692298 19.Re1 Kh8 20.Nc3 Qc7 21.Bxe5 Rxe5 > 22.Rxe5 Qxe5 23.Qxc6 >0:16 1/7 -0.35 936839 19.Be3 Nd4 20.Bxd4 Bxd4 21.Nf6+ > gxf6 22.Bd5 Bxf2+ 23.Qxf2 >0:25 1/8 -0.16 1540653 19.Be3 Be6 20.Rac1 Kh8 21.Bxc5 > bxc5 22.Rxc5 Nd4 23.Qa3 Rac8 24.Rdc1 > Rxc5 25.Rxc5 >0:48 1/9 -0.41 3195206 19.Be3 Be6 20.Rac1 Rad8 21.Bxc5 > bxc5 22.Rc2 Bxd5 23.Bxd5 e4 >1:02 1/9 -0.30 4191467 19.Bh6 Re6 20.Be3 Nd4 21.Bxd4 Bxd4 > 22.Rac1 e4 23.Qe2 >1:16 1/9 0.00 5345593 19.Nf6+ gxf6 20.Bd5 Bd7 21.Bh6 > Bf8 22.Qxf6 Re6 23.Bxe6 fxe6 24.Qg5+ > Kh8 25.Qf6+ Kg8 >1:35 1/10 0.00 6997334 19.Nf6+ gxf6 20.Bd5 Bd7 21.Bh6 > Bf8 22.Qxf6 Re6 23.Bxe6 fxe6 24.Qg5+ > Kh8 25.Qf6+ Kg8 >3:15 2/11 0.27 15441083 19.Nf6+ gxf6 20.Bd5 Bd7 21.Bh6 > Bf8 22.Qxf6 Re6 23.Bxe6 Bxe6 24.Ra3 > Bxh6 25.Rg3+ Kf8 26.Qxh6+ Ke7 27.Qh4+ > f6 28.Qxh7+ Bf7 >10:15 3/12 0.36 53030403 19.Nf6+ gxf6 20.Bd5 Bd7 21.Bh6 > Bf8 22.Qxf6 Re6 23.Bxe6 Bxe6 24.Ra3 > Ne7 25.Bxf8 Rxf8 26.Rg3+ Ng6 27.Qxe5 > >jm After forcing a few key moves, the problem move appears to be 22.Ra3. I suspect that The King engine would need to get to depth 16 for the eval to go above +1, which, of course, would take several hours on my machine. Still, though, it looks like it has the right plan as soon as it sees Nf6+. jm
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