Author: James Robertson
Date: 20:30:58 05/01/99
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On May 01, 1999 at 20:15:54, Francis Monkman wrote: >During a game with Genius4 in 95, the following position arose >after 17 moves by each side: > >White: Pa2,b2,c4,e5,f4,g2,h2 Ng3,g5 Bc1 Ra1,f1 Qe2 Kh1 >Black: Pa7,b7,c6,e6,f7,g7,h6 Na6,b6 (!) Bc5 Ra8,f8 Qe7 Kg8 > >White was pleased to find the continuation: > >18 f5! hxg5 >19 f6 gxf6 >20 Ne4 Rfd8 >21 Nxf6+ Qxf6 >22 Rxf6 Nd7 >23 Bxg5 Nxf6 >24 Bxf6 Kf8 >25 Qh5 Ke8 >26 Rf1 resigns > >It would seem obvious that White is winning within a 9-ply search, >so why doesn't any program find it? (You're of course welcome to >see for yourself of it's 'legal', but I can't find any get-out for Black.) The reason no program can find it is that 9 plies is insufficient to see the threat. My program favored Nfe4 through ply 11. I made the moves 18. f5 hxg6 and let my program think. After 12 plies and an eternity I got tired of waiting and stopped it; the pv was 19. h4 g4 20. Qxg4 <HT>, with a score of 0.00. James
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