Author: leonid
Date: 13:10:03 04/14/01
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On April 14, 2001 at 11:25:53, Paul wrote: >On April 14, 2001 at 10:37:06, leonid wrote: > >>Hello! >> >>If you like to solve one mate (or if you want to selebrate Passover by >>crucifying your solfware) then this position is just for you: >> >>[D]1qRr2bk/Q1P1q1bq/4Qn1N/3qq1Qn/KRQ1Qq1N/B2B4/6Qq/2q3r1 w - - >> >>Please, indicate your result. >> >>Thanks, >>Leonid. > >The first thing Pretz says is this (mate in 13): > >11:34 WM13 10 Qxg8+ Qhxg8 Ng6+ Kh7 Nxe5+ Kh8 Ng6+ Kh7 Nxe7+ Kh8 Qh7+ Qxh7 >cxd8=Q+ Ne8 Qxe8+ Bf8 Qad4+ Qbe5 Qdxe5+ Qfxe5 Qxf8+ Qhg8 Qfxg8+ Qxg8 Rxg8# > >Will try some different extensions later ... I hope so. I know that this position look like very deep. Mine found mate in 13 but I was not able to solve it by brute force in order to know shortest mate. In 9 moves there is no mate for sure. I went even to search for 10 moves, since branching factor happened to be good for brute force. But when 10 moves took more then 1 hour, I left search. I needed computer. Also I saw that branching factor became bad for 10 moves. Expected time for 10 moves was 45 minutes. I waited already for 1 hour. Maybe somebody with better selective search, or better branching factor, for brute force, will reach mate below 13. I am curious to know what is shortest mate here. Salut, Leonid. >Groetjes, >Paul
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