Author: Heiner Marxen
Date: 07:14:17 04/17/01
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On April 16, 2001 at 10:32:20, Paul wrote: >On April 16, 2001 at 09:13:33, leonid wrote: > >>Hello! >> >>If you like to solve a mate then this could be the one: >> >>[D]1Q1r2kr/1nq1q1pp/q1b1n1N1/3NbQq1/QB4BQ/q3Q3/3q1q2/1K1Q4 w - - >> >>Please indicate your result. >> >>Don't forget name your program and hardware. >> >>Thanks, >>Leonid. > >I do! :) These are the results from Amsterdam, a mate in 9: > >00:38 WM9 09 Ngxe7+ Qgxe7 Nxe7+ Qxe7 Qxe6+ Qff7 Qxf7+ Qxf7 Qbxd8+ Nxd8 Qxd8+ >Qxd8 Qxd8+ Be8 Qdxe8+ Qxe8 Qxe8# Actually, there are two key moves for a mate in 9 according to Chest (K7/600, 350MB hash, 33 seconds): Ndxe7+ =*= Nxe7+ Qxe7 Qxe6+ Qff7 Qxf7+ Qxf7 Qhxd8+ Nxd8 Qxd8+ Qxd8 Qxd8+ Be8 Qdxe8+ Qf8 Qxf8# Ngxe7+ =*= Nxe7+ Qxe7 Qxe6+ Qff7 Qxf7+ Qxf7 Qhxd8+ Nxd8 Qxd8+ Qxd8 Qxd8+ Be8 Qdxe8+ Qf8 Qxf8# Chest is so fast here, because black has easy mate threats, itself. Such threats quite effectively cut down search tree size. Chest searches less than 2M nodes, here. Heiner
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