Author: jefkaan
Date: 06:47:29 07/23/05
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On July 23, 2005 at 06:42:41, Sune Larsson wrote: >One of my DB:s is labelled "hard" - meaning hard positions for engines. The one >below is such a position. It's a study by Zachodjakin from 1930. I have tested >it on a PIII 800. Does much faster hardware make any difference? > probably, yes, Shredder 9 on my comp Intel 3 Ghz comes with g7+ in 1 min 22 s, and quickly finds the right pv. But the eval is remaining at minus 5.4, as black can give king check (Qe2) for 50 moves, without seeing it can't make progress. > >[D]5B1k/7p/6P1/4NnP1/8/8/K4p2/8 w - - 0 1 > >Knight Power by Zachodjakin 1930. White to move and draw. > > >Solution: 1.g7+! Nxg7 2.Nf7+ Kg8 3.Bc5! f1Q 4.Nh6+ Kh8 5.Bd6 and black > can't make any progress. The bishop is immune thanks to Nf7+. > > >/Sune
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