Author: Matthew White
Date: 12:13:51 08/27/03
Go up one level in this thread
On August 27, 2003 at 11:57:12, James T. Walker wrote: >Here is a position which came up last night while testing a beta engine. >[D]8/4k3/8/4K2p/7P/5rPb/8/6R1 b - - >It's hard to find a program that will play Rf1 forcing the rook exchange and >progressing to a tablebase won ending. Shouldn't there be some knowledge that >would tell engines to do this without searching 30 plies? I mean the bishop >covers the queening square of the black pawn which should be a clue to the win. >Jim Rebel 12 Prerelease: New game 8/4k3/8/4K2p/7P/5rPb/8/6R1 b - - 0 1 Analysis by Rebel 12: 1...Rxg3 2.Rxg3 +- (1.67) Depth: 1 00:00:00 1...Be6 -+ (-2.31) Depth: 1 00:00:00 1...Be6 2.Kd4 -+ (-2.35) Depth: 2 00:00:00 1...Be6 2.Ke4 Ra3 -+ (-2.31) Depth: 3 00:00:01 1...Be6 2.Rg2 Ra3 -+ (-2.31) Depth: 4 00:00:01 1...Be6 2.Rg2 Ra3 3.Ke4 Ra4+ 4.Ke5 -+ (-2.35) Depth: 5 00:00:01 1...Be6 2.Rg2 Ra3 3.Ke4 Ra4+ 4.Ke5 -+ (-2.35) Depth: 6 00:00:01 23kN 1...Be6 2.Rg2 Ra3 3.Ke4 Ra4+ 4.Ke5 Ra3 5.Ke4 -+ (-2.35) Depth: 7 00:00:04 64kN 1...Be6 2.Rg2 Bf5 3.Rg1 Bd7 4.Ke4 Bc6+ 5.Ke5 -+ (-2.31) Depth: 8 00:00:07 215kN 1...Rf1 2.Rxf1 Bxf1 3.Kf4 Bh3 4.Kg5 Bg4 5.Kf4 -+ (-2.41) Depth: 8 00:00:08 250kN 1...Rf1 2.Rxf1 Bxf1 3.Kf4 Bh3 4.Ke5 Bg4 5.Kd5 -+ (-2.41) Depth: 9 00:00:10 472kN 1...Rf1 2.Rxf1 Bxf1 3.Kf4 Bh3 4.Ke5 Be6 5.Kf4 -+ (-2.46) Depth: 10 00:00:13 1280kN 1...Rf1 2.Rxf1 Bxf1 3.Kf4 Bh3 4.Ke5 Be6 5.Kf4 -+ (-2.48) Depth: 11 00:00:16 3535kN 1...Rf1 2.Rxf1 Bxf1 3.Kf4 Bh3 4.Ke5 Be6 5.Kd4 -+ (-2.49) Depth: 12 00:00:25 9576kN (White, Mountain View 27.08.2003)
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