Author: Slater Wold
Date: 21:34:53 08/08/02
Go up one level in this thread
On August 09, 2002 at 00:17:33, John Merlino wrote: >On August 08, 2002 at 23:20:47, Slater Wold wrote: > >>[D]3r1brk/1p3p1p/p1npp1p1/3Nn1Q1/P1P1PN2/1q4R1/5PPP/B1R3K1 b - - 0 24 >> >>How long does it take your engine to understand it's losing? >> >>How long does it take it to understand it's losing badly? > >It takes Chessmaster 9000, on a PIII-733, 4:14 to see that Qxa4 loses. The fail >low doesn't resolve until 7:39, in favor of Qa2, which doesn't look TOO bad at >first sight. On second sight, it looks a little worse: > >Time Depth Score Positions Moves >0:00 1/3 -1.32 3722 24...Qxa4 25.Nb6 Qb4 26.Bd4 >0:00 1/4 -1.67 13895 24...Qxa4 25.Nf6 Be7 26.Qh4 Rg7 >0:00 1/5 -1.44 37160 24...Qxa4 25.Nf6 Be7 26.Qh4 Rg7 > 27.Rh3 >0:01 1/6 -1.36 109217 24...Qxa4 25.Nf6 Be7 26.Qh4 Rg7 > 27.Rh3 Bxf6 28.Qxf6 >0:04 1/7 -1.41 322890 24...Qxa4 25.Nf6 Be7 26.Qh4 Rg7 > 27.Rh3 Bxf6 28.Qxf6 Re8 29.Bb2 Qa5 >0:10 1/8 -1.38 859511 24...Qxa4 25.Nf6 Be7 26.Qh4 Rg7 > 27.Rh3 Bxf6 28.Qxf6 Qa2 29.Nd3 > Qd2 30.Rb1 >0:27 1/9 -1.29 2430899 24...Qxa4 25.Nf6 Be7 26.Qh4 Rg7 > 27.Rh3 Bxf6 28.Qxf6 Re8 29.Rd3 > Qb4 30.Rcd1 Qxc4 31.Rxd6 >1:13 1/10 -1.09 6848593 24...Qxa4 25.Nf6 Be7 26.Qh4 Rg7 > 27.Rh3 Bxf6 28.Qxf6 Qa5 29.Rd1 > Kg8 30.Ne2 Re8 31.Bxe5 Nxe5 >4:14 2/11 1.48 23163907 24...Qxa4 25.Nf6 Be7 26.N4h5 Rg7 > 27.Qh6 Rdg8 28.f4 Ng4 29.Rxg4 Qa3 > 30.Rd1 Qb3 >7:39 2/11 0.60 42138807 24...Qa2 25.Nf6 Be7 26.N4h5 Rg7 > 27.Qh6 Rdg8 28.Bc3 Bd8 29.Nxg7 > Bxf6 30.Nh5 >15:32 3/12 1.04 88344527 24...Qa2 25.Nf6 Be7 26.N4h5 Rg7 > 27.Qh6 Rdg8 28.Ne8 Bh4 29.Nhxg7 > Bxg3 30.hxg3 Qxa4 31.Nh5 > >jm Considering the HW, that's not too bad. With a 1.5Ghz you could probably bring it down to 2 minutes or so. Of course, this game is all but over, so 1.04 isn't exactly seeing it's lost. You can still draw (and sometimes win) with a 1.04 score against other computers. However, this is from a computer vs 2550 GM and it's *over*. If you play Qa2 Nf6 and let it think, Be7 will fail low as well, probably past 4.00+ or so. Then it will decide to lose the rook, and it will even out the rest of the game.
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