Author: Uri Blass
Date: 12:24:40 01/13/05
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On January 13, 2005 at 10:35:15, Duncan Roberts wrote: >First of all thanks for doing this and I believe this has contributed to chess >knowledge. > > >To sum up can we say on the assumption that null move finds most stuff, that >most likely there is no material gain for white in the first 35 (12 + 23)moves. >? I can say that I am sure that there is no material gain in the first 35 moves from the opening position but not based on that stuff but based on human experience(I can say about things that I am sure about them even with no mathematical proof and it is obvious for every chess player that the opening position is too quiet to find forced material win even in 40 plies). null move prunes a lot of relevant lines and I am quiet sure that if you take positions from comp-comp games when there is a deep material win you will find sometimes material gain with 12 plies without null move and only with 14 plies with null move and the difference may be also higher. It seems that the program found material win but it seems that it is a question of definition of material. if rook and 2 pawns are more than bishop and knight you find material win. Yace no material(a version that I got from dieter) evaluates rook and 2 pawns as less than bishop and knight so it cannot find winning material in a reasonable time(I know that it evaluates rook as 5 pawns and pawn as 0.8 when it evaluate knight as 3.4 and bishop as 3.5 but I wrongly did not think that it is important). It seems that both yace(only material) and postmodernist do not use 1 3 5 9 for pieces. Here is analysis by yace only material to 13 plies(yace is not so arrogant to claim that it can search 23 plies). New game, rnbqkbnr/pppppppp/8/8/2BPPB2/2N2N2/PPP2PPP/R2QK2R w KQkq - 0 1 Analysis by Yace 0.99.61 MO: 1.Bxc7 Qxc7 -+ (-2.70) Depth: 1 00:00:00 1.Be5 = (0.00) Depth: 1 00:00:00 1.Be5 = (0.00) Depth: 1 00:00:00 1.Be5 f6 = (0.00) Depth: 2 00:00:00 1.Be5 f6 = (0.00) Depth: 2 00:00:00 1.Be5 f6 2.Bg3 = (0.00) Depth: 3 00:00:00 1.Be5 f6 2.Bg3 = (0.00) Depth: 3 00:00:00 1.Be5 f6 2.Bg3 c6 = (0.00) Depth: 4 00:00:00 1.Be5 f6 2.Bg3 c6 = (0.00) Depth: 4 00:00:00 1.Be5 f6 2.Bg3 c6 3.e5 = (0.00) Depth: 5 00:00:00 1.Be5 f6 2.Bg3 c6 3.e5 = (0.00) Depth: 5 00:00:00 1.Be5 f6 2.Bg3 c6 3.e5 fxe5 = (0.00) Depth: 6/16 00:00:00 52kN 1.Be5 f6 2.Bg3 c6 3.e5 fxe5 = (0.00) Depth: 6/20 00:00:00 160kN 1.Be5 f6 2.Bg3 c6 3.e5 fxe5 4.dxe5 = (0.00) Depth: 7/20 00:00:00 198kN 1.Be5 f6 2.Bg3 c6 3.e5 fxe5 4.dxe5 = (0.00) Depth: 7/22 00:00:00 633kN 1.Be5 f6 2.Bg3 c6 3.e5 fxe5 4.dxe5 g6 5.0-0 = (0.00) Depth: 8/22 00:00:01 804kN 1.Be5 f6 2.Bg3 c6 3.e5 fxe5 4.dxe5 g6 5.0-0 = (0.00) Depth: 8/27 00:00:02 2477kN 1.Be5 f6 2.Bg3 c6 3.e5 fxe5 4.dxe5 g6 5.0-0 d6 = (0.00) Depth: 9/27 00:00:02 3373kN 1.Be5 f6 2.Bg3 c6 3.e5 fxe5 4.dxe5 g6 5.0-0 d6 = (0.00) Depth: 9/31 00:00:06 8481kN 1.Be5 f6 2.Bg3 c6 3.e5 fxe5 4.dxe5 g6 5.0-0 d6 6.exd6 = (0.00) Depth: 10/31 00:00:06 10353kN 1.Be5 f6 2.Bg3 c6 3.e5 fxe5 4.dxe5 g6 5.0-0 d6 6.exd6 = (0.00) Depth: 10/35 00:00:16 24230kN 1.Be5 f6 2.Bg3 e6 3.0-0 g6 4.Bb3 d6 5.Na4 e5 6.dxe5 = (0.00) Depth: 11/35 00:00:19 30379kN 1.Be5 f6 2.Bg3 e6 3.0-0 g6 4.Bb3 d6 5.Na4 e5 6.dxe5 = (0.00) Depth: 11/37 00:00:47 73885kN 1.Be5 f6 2.Bg3 e6 3.0-0 g6 4.Bb3 d6 5.Na4 e5 6.dxe5 dxe5 = (0.00) Depth: 12/37 00:01:06 101113kN 1.Be5 f6 2.Bg3 e6 3.0-0 g6 4.Bb3 d6 5.Na4 e5 6.dxe5 dxe5 = (0.00) Depth: 12/42 00:02:37 237041kN 1.Be5 f6 2.Bg3 e6 3.0-0 g6 4.Bb3 d6 5.Na4 e5 6.dxe5 dxe5 7.Qxd8+ Kxd8 8.c3 = (0.00) Depth: 13/42 00:03:38 324707kN 1.Be5 f6 2.Bg3 e6 3.0-0 g6 4.Bb3 d6 5.Na4 e5 6.dxe5 dxe5 7.Qxd8+ Kxd8 8.c3 = (0.00) Depth: 13/48 00:08:51 785377kN
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