Author: Uri Blass
Date: 23:24:20 02/05/01
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On February 06, 2001 at 02:11:13, Uri Blass wrote: >On February 05, 2001 at 17:41:58, Paul wrote: > >>On February 05, 2001 at 17:04:04, leonid wrote: >> >>>On February 05, 2001 at 09:15:52, Paul wrote: >>> >>>>I've been looking through the archives a bit, and came across this mate that Dr. >>>>Dann posted a long time ago, it's not too easy, but not too difficult either for >>>>top programs (but mine has a hard time finding it :) ... >>>> >>>>[D]2r3k1/5ppp/7r/Q7/3P1p2/1N3Pnq/PP3K1P/R5R1 b - - >>>> >>>>J'espère que ce te plais (my French isn't what it used to be, ha!) ... >>> >>>Thanks, Paul! But say me, for the sake of precaution, in how many moves it is >>>expected mate in your position? Mine, for now, can't see more that 13 moves >>>ahead. >> >>There is a mate in 9 possible ... but my program found a mate in 11. >>This is the line so you can check later: >> >>Ne4+ fxe4 Qe3+ Kf1 Rxh2 Rxg7+ Kxg7 Qe5+ > >5.Qe5+ is not the best move when the mate from the original position is only >mate in 10 > >5.Qg5+ Kf8 6.Qg2 Rxg2 7.Kxg2 Rc2+ 8.Nd2 Rxd2+ 9.Kh1 Qxe4+ 10.Kg1 Qg2# > >Uri I see that I am wrong and 6...Rxg2 is a mistake when 6...Rc2 is a mate in 4 After reading that chest solved it I understood that I am wrong(chest does not do mistkaes). 6...Rc2 is the move that programs prune so they can see only mate in 10. Uri
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