Author: Vincent Diepeveen
Date: 08:50:13 12/22/01
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On December 22, 2001 at 07:12:00, Steffen Jakob wrote: Bc5+ 1 Kc8 2 Ba7 3 nullmove 4+R Kd2 5+R nullmove 6+2R Kc3 7+2R nullmove 8+3R Kb4 9+3R nullmove 10+4R Ka5 11+4R nullmove 12+5R nullmove 13+6R <move> 14+6R check in qsearch and capture rook. Estimation to find it: 14+6R minus 1 extension perhaps = 13+6R But if someone asks me to run this position in a lightflash of a second i already have turned off nullmove after which is it much faster to find this :) Fullwidth: Bc5+ 1 Kc8 2 Ba7 3 a6 4 Kd2 5 a5 6 Kc3 7 a4 8 Kb2 9 a3+ 10 Ka2 11 kd8 12 in qsearch Rh8 and xa8. So fullwidth it's 12 ply minus 2 check extensions = 11 ply. Best regards, Vincent >Hi! > >I ran the JenoBan endgame test suite which I got from Lyapko Georges web server >(http://www.geocities.com/lyapko/jenoban.htm). This is position #79 (the id tag >is missing in the epd file from this server): > >r2k1B2/7R/p7/8/8/8/8/4K3 w - - bm Bc5; (JenoBan_TofE) #79 white_wins > >[D]r2k1B2/7R/p7/8/8/8/8/4K3 w - - > >Hossa switches between Bb4 and Bc5 but both with a drawish score. Crafty prefers >Bd6 on my machine, also with a drawish score. Can someone please explain why Bc5 >is the best move here and how it wins? Or is this position broken? > >Greetings, >Steffen.
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