Author: John Merlino
Date: 12:02:42 04/19/04
Go up one level in this thread
On April 19, 2004 at 14:30:33, Dann Corbit wrote: >On April 19, 2004 at 14:09:41, John Merlino wrote: > >>On April 19, 2004 at 13:49:12, Dann Corbit wrote: >> >>>... this position from the Evans Gambit? Shredder has reduced the score to 0.13 >>>pawns and most engines I tried were much farther away from the true value. >>> >>>On the other hand, all the engines I did try eventually start a slow march >>>downward with the score. Some are wildly optimistic (thinking at first that >>>they are two pawns ahead). >>> >>>[D]r1bqk1nr/pppp1ppp/2n5/b7/2BpP3/2P2N2/P4PPP/RNBQ1RK1 b kq - am dxc3; bm Nge7; >>> >> >>Here is CM_SKR's output on an AMD 2500+: >> >>Time Depth Score Positions Moves >>0:00 1/3 -1.00 1730 1...dxc3 2.Qd5 Qe7 3.Na3 >>0:00 1/4 -1.22 7395 1...dxc3 2.Be3 d6 3.Na3 Nf6 >>0:00 1/5 -0.31 24166 1...dxc3 2.Qb3 Nf6 3.Bxf7+ Kf8 >> 4.Ng5 Ne5 >>0:00 1/6 -0.19 66819 1...dxc3 2.Qb3 d6 3.Nxc3 Bxc3 4.Qxc3 >> Nf6 5.Bg5 O-O >>0:00 1/6 -0.24 79779 1...Nf6 2.e5 Ne4 3.Qb3 O-O 4.cxd4 >> d6 >>0:01 1/7 -0.20 209149 1...Nf6 2.e5 Ne4 3.cxd4 d5 4.exd6ep >> O-O >>0:01 1/7 -0.35 329351 1...dxc3 2.Qb3 Nf6 3.Bxf7+ Kf8 >> 4.Ng5 h6 5.Ba3+ d6 6.Bg6 >>0:03 1/8 -0.28 750696 1...dxc3 2.Qb3 Qe7 3.Nxc3 Nf6 4.e5 >> Nxe5 5.Nxe5 Qxe5 6.Bxf7+ Kd8 7.Bb2 >>0:08 1/9 -0.08 2056551 1...dxc3 2.Qb3 Qf6 3.Bg5 Qg6 4.Nxc3 >> Nf6 5.e5 Nxe5 6.Nxe5 Qxg5 7.Nxf7 >>0:26 1/10 -0.08 6240835 1...dxc3 2.Qb3 Qf6 3.Bg5 Qg6 4.Nxc3 >> Nf6 5.e5 Nxe5 6.Nxe5 Qxg5 7.Nxf7 >>0:38 1/10 -0.23 8997341 1...Nf6 2.e5 Ne4 3.Qe1 Nxc3 4.Bg5 >> Nxb1 5.Qxb1 Ne7 6.Qb3 >>1:17 1/11 -0.06 18550374 1...Nf6 2.e5 Ne4 3.Qe1 Nxc3 4.Bg5 >> Nxb1 5.Qxb1 Ne7 6.Qb3 d5 7.exd6ep >> Qxd6 >>3:56 1/12 -0.20 57431817 1...Nf6 2.e5 Ne4 3.Qe1 Nxc3 4.Bg5 >> Nxb1 5.Qxb1 Ne7 6.Nxd4 d5 7.exd6ep >> Qxd6 >>8:56 1/13 -0.04 132545443 1...Nf6 2.e5 Ne4 3.Qe1 Nc5 4.Bg5 >> Ne7 5.Nxd4 h6 6.Bxe7 Qxe7 7.Nf5 Qg5 >> >>(Remember that, in the CM GUI, negative evals mean that Black is ahead). > >That is a very impressive result. None of the engines I tried could find it >even after a very long search. Just for comparison, here's what the default settings say: Time Depth Score Positions Moves 0:00 1/3 -1.17 1680 1...dxc3 2.Qd5 Qe7 3.Na3 0:00 1/4 -1.30 6641 1...dxc3 2.Be3 Nf6 3.Qb3 0:00 1/5 -0.39 22966 1...dxc3 2.Qc2 Nf6 3.Nxc3 O-O 4.Bb2 0:00 1/6 -0.39 68215 1...dxc3 2.Qb3 Nf6 3.Bxf7+ Kf8 4.Ng5 h6 5.Bg6 0:02 1/7 -0.42 223841 1...dxc3 2.Qb3 Nf6 3.Nxc3 O-O 4.Bg5 Bxc3 5.Qxc3 Nxe4 6.Bxd8 Nxc3 7.Bxc7 0:03 1/8 -0.28 607748 1...dxc3 2.Qb3 Nf6 3.Bxf7+ Kf8 4.Bd5 Nxd5 5.exd5 c2 6.dxc6 cxb1=Q 7.Rxb1 dxc6 0:10 1/9 -0.23 2191564 1...dxc3 2.Qb3 Nf6 3.Ng5 Qe7 4.Ba3 d6 5.Bxf7+ Kd8 6.Nxc3 Nd4 0:28 1/10 -0.25 6481554 1...dxc3 2.Qb3 Qf6 3.e5 Qg6 4.Nxc3 Nge7 5.Be3 O-O 6.Rad1 d6 7.exd6 cxd6 1:07 2/11 -0.13 15877680 1...dxc3 2.Qb3 Qf6 3.e5 Qg6 4.Nxc3 Nge7 5.Bf4 O-O 6.Rfd1 Bb6 7.Rab1 2:28 2/11 -0.29 35214495 1...Nf6 2.cxd4 Nxe4 3.d5 Ne7 4.Qd4 Nd6 5.Qxg7 Rg8 6.Qd4 Nxc4 7.Qxc4 6:24 3/12 -0.42 94618938 1...Nf6 2.cxd4 Nxe4 3.d5 Ne7 4.Qd4 Nd6 5.Qxg7 Rg8 6.Qd4 Bb6 7.Qd3 Nxc4 8.Qxc4 15:03 4/13 -0.26 231312138 1...Nf6 2.e5 Ne4 3.Qe1 Nxc3 4.Bg5 Nxb1 5.Qxb1 f6 6.exf6 gxf6 7.Qf5 d5 jm
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