Author: Dann Corbit
Date: 21:09:00 01/22/01
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On January 22, 2001 at 20:01:22, Bruce Moreland wrote: >[D]r4r1k/4bppb/2n1p2p/p1n1P3/1p1p1BNP/3P1NP1/qP2QPB1/2RR2K1 w - - 0 1 > >After a trillion nodes (19 plies) my program can't solve this. > >It wants to play Nxh6 with a dubious +1 score (up an exchange for a pawn, and >probably losing a pawn), but it can't find the key, which is Ng5. > >If this is solvable, it is much harder than many of the others. From: http://www.ex.ac.uk/~dregis/DR/Trawl/ComputerProb.html Here is the published Deep Thought answer: 9 ;r4;r1;k/4;b;p;p;b/2;n1;p2;p/;p1;n1p3/1;p1;p1bnp/3p1np1/;qp2qpb1/2rr2k1/40 White to move 8 R * - * - R - K 7 * - * - B P P B 6 - * N * P * - P 5 P - N - p - * - 4 - P - P - b n p 3 * - * p * n p - 2 Q p - * q p b * 1 * - r r * - k - a b c d e f g h Source: unknown. After 9 minutes, it played 1. Nf6, expecting 1. ... Rfc8 2. Nh7 Kh7 3. Ra1 ... The score was slightly nagative for white. On longer searches, it went up to half a pawn and creeping up.
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