Author: Dieter Buerssner
Date: 12:42:18 12/10/00
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On December 10, 2000 at 13:41:43, Mike S. wrote: > 3R4/5r1p/5ppk/8/1Q3PPq/5P2/6K1/8 w - - 0 52 >52.Rd1 (-h1) wins the queen for the rook, but there is a better move: 52.Rg8!! >Zugzwang! 52...Qh5 [52...f5 53.g5+ Kh5 54.Qd6 threatens # in 3: 55.Qxg6+ hxg6 >56.Rh8+; 52...g5 53.Qd6 threatens # in 3: 54.fxg5+ Qxg5 55.Qh2+] 53.gxh5 Rc7 >54.Qf8+ Kxh5 55.Qxf6 Rc2+ 56.Kg3 1-0 So I started my engine. With default settings on K6-2 475 Yace needs 60 seconds, to fail high for Rg8 with a score of > 10.0 (Rd1 had about 5.0 before) I think, this is a positions, where null move will hurt. Disabling null move, and Yace finds this in 6 seconds at much lower depth (and with a score of 6, but the score rises then). With only little aggressive null move (R=1), the solution is found after 15 seconds. Regards, Dieter
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