Author: Bruce Moreland
Date: 09:47:33 09/19/01
Go up one level in this thread
On September 19, 2001 at 05:29:27, Uri Blass wrote: >On September 19, 2001 at 03:54:57, Bruce Moreland wrote: > >>I ran for two minutes per position in K=2 mode, and here is what I came up with. >> >>It's hard to decide exactly what constitutes a cook. In purest sense, a cook >>should be a mate that is no slower than the key allows. >> >>I think that positions with approximately the same large score could be >>confusing, and I found a lot of those. >> >>I would throw these out, to be safe. >> >>Your mileage may vary. >> >>bruce >> >>--------------- >> >>Id: ECM.973 >>Fen: 2r2bk1/4qp2/3n2p1/2R1p1Np/2p1N3/r6P/1Q3PP1/3R2K1 w - - 0 1 >>Qxa3 is +3, the key, Rxc8 is +4. > >1.Qxa3 Ne4 2.Nxe4 Rxc5 3.Rd7 Qe6 4.Rd8 Qe7 > >I believe that 5.Rxf8+ is winning for white but programs need time to find this >move and usually prefer at small depthes Re8 that probably leads to a draw > >If Ferret evalutes 5.Re8 as +3 and not +1 for white then it seems that it has a >poblem in it's evaluation function > >Here is Junior's evaluation for 5.Re8 > >It needs very small depth and less than 1 second on p200 to understand that the >score should not be +3 for white > >Deep Fritz also does not see +3 score for white. You can't say that I have a problem because other programs fail low quickly after you give then ten plies for free. My program only searched 12 plies here, from the root. My program likes Rxc8 better, but it has a good score for Qxa3, because in the final position white is up a queen for a rook and a pawn. If the final position in the PV is incorrect, oh well. bruce >New position >[D]3R1bk1/4qp2/6p1/2r1p2p/2p1N3/Q6P/5PP1/6K1 w - - 0 1 > >Analysis by Junior 7: > >5.Rd1 Rb5 > µ (-0.91) Depth: 3 00:00:00 >5.Ra8 Rc7 6.Nf6+ Qxf6 7.Qxf8+ > ² (0.59) Depth: 3 00:00:00 >5.Rxf8+ Kxf8 6.Nxc5 Qd8 > ± (1.07) Depth: 3 00:00:00 >5.Rxf8+ Qxf8 6.Nxc5 Qd8 7.Ne4 > ± (0.71) Depth: 6 00:00:00 4kN >5.Re8! > ± (1.37) Depth: 6 00:00:00 7kN >5.Re8! Qxe8 6.Nf6+ Kh8 7.Nxe8 Kh7 > +- (2.22) Depth: 6 00:00:00 9kN >5.Re8 Qxe8 6.Nf6+ Kh8 7.Nxe8 c3 8.Nf6 c2 9.Qc1 > ± (1.06) Depth: 9 00:00:00 37kN >5.Re8 Qxe8 6.Nf6+ Kh8 7.Nxe8 c3 8.Nf6 c2 9.Qc1 Rc6 10.Nd7 Bd6 > ± (0.99) Depth: 12 00:00:02 226kN > > > >Uri
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