Author: leonid
Date: 21:48:16 05/27/01
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On May 26, 2001 at 15:46:20, Uri Blass wrote: >[D]2nbkn2/1P1pp1P1/1qPrPq1r/B2N3b/3PN3/q1RB4/3K2Q1/5R2 b - - > >This position is based on leonid's position but it is black to move. > >Black can force mate in at most 11 when the main line begins with > >1...Qbb2+ 2.Ke3 Qxd4+ 3.Kxd4 Rxd5+ 4.Ke3 Bb6+ 5.Bxb6 Qxb6+ 6.Nc5 Qbxc5+ >7.Rxc5 Rd3+ > >Junior found this line and yace by going forward and backward decided to believe >Junior. > >[D]2kr3r/ppp2p2/7p/8/6bq/2Q5/PPP3K1/RNB1N3 b - - 0 1 > >This position is from a practical game of Deep Fritz in the ICC tournament(round >1). > >The opponent resigned but Deep Fritz can probably force mate in 9 moves by >21...Rhg8 22.Bf4 Bh3+ 23.Kf3 Qg4+ 24.Ke3 Qg1+ 25.Kf3 Bg4+ 26.Ke4 f5+ 27.Ke5 Qb6 >28.Qxc7+ >Kxc7 Nf3 Rge8# > >At least this is the opinion of yace. > >Uri Thanks, Uri, for good positions! First one my solved by selective in 11 sec. By brute force it could be still not that difficult since branching factor is very mild. In second position my default selective was not successful. Brute force was very slow. Seven moves took already 1 hour and 10 min. Celeron 600Mhz. No hash. LLchess mate solver. Cheers, Leonid.
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