Author: Paulo Soares
Date: 14:27:10 02/12/99
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On February 12, 1999 at 12:33:53, blass uri wrote: >8/p2q4/4pQ2/p2p4/p1pQ1K2/2p2b2/1N1N1n1p/2B4k b - - 0 1 > >This is a study I composed a few years ago. > >black say mate in 17.5 against itself. >I used Genius3 for many hours to help me to compose and to check the endgame. > >The main line is 1...e5+ 2.Kxf3 Qh3+ 3.Kxf2 Qg2+ 4.Ke1 exd4 5.Qf1+ Qxf1 6.Kxf1 >cxb2 7.Bxb2 c3 8.Nb1 cxb2 9.Kf2 a3 10.Nxa3 a4 11.Nb1 a3 12.Nxa3 d3 13.Nb1 a5 >14.Nd2 b1Q 15.Nxb1 a4 16.Nd2 a3 17.Nf1 a2 18.Ng3# > >Uri Uri, Fritz5.32 has problems with the promotions and it does not obtain. Genius6 has more knowledge in that it says respect to the promotions and goes more far, look: PII-300 Ht=64Mb After 8... cxb2 9.Kf2 #10 depth16 14sec. After 7... c3 8.Nb1 #11 depth18 133sec. After 6... cxb2 7.Bxb2 depth20 >1200sec. I do not believe a program can solve this problem. Repairs that I gave up after 20 minutes when Genius6 probably would find #12 but, which would be the time necessary to find mate in 17,5? probably many months (years?). It is a problem that requires much depth of analysis, and still has possible promotions of pions on the part of the blacks. Best regards, Paulo Soares, from Brazil.
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