Author: pavel
Date: 14:12:13 12/30/01
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On December 30, 2001 at 17:07:05, pavel wrote: >On December 30, 2001 at 16:55:41, Jeroen van Dorp wrote: > >>[D]r1b2r2/3pNpkp/3pn1p1/2pN3P/2PnP3/q3QP2/4BKP1/1R5R w - - 0 1 >> >>This is a problem: white to move and win. >>When looking at it, (as a human, of course:)) you immediately start thinking >>about h6+ or Qh6+ followed by hxg6+ looking at the two rooks comfortably with an >>open h-file, and the knights "checking" the mobility of the black king. >> >>All engines I tested started however with Qd2, and almost all switched to Qh6+ >>very soon on my PIII@840: Gandalf 5, 47 seconds, CT 14.0 34 seconds, Shredder 6 >>32 seconds , Hiarcs 7.32 in 54 seconds, Nimzo 8 saw the mate in 20 seconds, >>Junior 7 in 39 seconds, and Fritz 7(both MMX (7a) and no-MMX)... didn't find it >>but after some 6 minutes, and found the mate in 9 minutes 41 seconds. >> >>What could be the reason? >>Are there people here willing to check it with Fritz on faster machines? BTW not >>only looking for the *move* Qh6+ but for the move *and mate* with Qh6+ >> >> >>[Event "?"] >>[Site "?"] >>[Date "2001.12.30"] >>[Round "?"] >>[White "?"] >>[Black "?"] >>[Result "*"] >>[Opening ""] >>[Setup "1"] >>[FEN "r1b2r2/3pNpkp/3pn1p1/2pN3P/2PnP3/q3QP2/4BKP1/1R5R w - - 0 1"] >> >>1.Qh6+ Kxh6 ( 1...Kh8 2.hxg6 Qxf3+ 3.gxf3 Nxf3 4.Qxh7# ) 2.hxg6+ Kg5 ( 2...Kg7 >>3.Rxh7#) 3.Rh5+ Kxh5 $8 4.f4+ Qf3+ ( 4...Kh4 5.Rh1+ Qh3 6.Rxh3# ) 5.Bxf3+ Nxf3 >>6.Rh1+ Nh4 7.Nf6+ Kh6 8.Rxh4+ Kg7 9.Ne8+ Rxe8 10.Rxh7+ Kf8 11.Rxf7# * > > >How much nps do you get with Fritz7a on this position? It took me 11.15mins to find it in my PIII 1Ghz 512mb ram. wonder why. I got around 530+nps. pavs
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