Author: Ernst Walet
Date: 12:40:58 12/31/01
Go up one level in this thread
On December 30, 2001 at 17:12:13, pavel wrote: >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 Hastable size? Ernst. New game r1b2r2/3pNpkp/3pn1p1/2pN3P/2PnP3/q3QP2/4BKP1/1R5R w - - 0 1 Analysis by Fritz 7: 1.Qd2 g5 2.Nb6 Nf4 3.h6+ Kh8 ± (1.32) Depth: 6/24 00:00:00 246kN 1.Qd2 g5 2.Nb6 Nf4 3.h6+ Kh8 4.Nxa8 Qxa8 ± (1.32) Depth: 7/30 00:00:00 373kN 1.Qd2 g5 2.Nb6 Rb8 3.Nbxc8 Rfxc8 4.h6+ Kh8 5.Nxc8 Rxc8 ± (1.38) Depth: 8/26 00:00:01 936kN 1.Qd2 g5 2.Nb6 Rb8 3.Nbxc8 Rfxc8 4.h6+ Kh8 5.Nxc8 Rxc8 6.Rhd1 +- (1.54) Depth: 9/31 00:00:04 2491kN 1.Qd2 g5 2.Nf5+ Kg8 3.Nxd6 Nf4 4.Nxf4 gxf4 5.Rh4 Qa2 6.Rb2 Qa1 7.Rg4+ Kh8 +- (1.41) Depth: 10/33 00:00:09 6079kN 1.Qd2 g5 2.Nf5+ Kh8 3.Nxd6 Qa2 4.Rb2 Qa3 5.e5 Nf4 6.Nxf4 gxf4 7.Rhb1 +- (1.50) Depth: 11/31 00:00:31 19777kN 1.Bd3! +- (1.54) Depth: 11/36 00:00:54 34452kN 1.Bd3 g5 2.e5 g4 3.Rh4 g3+ 4.Kxg3 Kh8 5.exd6 Ba6 6.Kh2 Rfe8 +- (1.69) Depth: 12/39 00:02:22 89234kN 1.Qh6+! +- (1.72) Depth: 12/39 00:03:02 115257kN 1.Qh6+! +- (1.88) Depth: 12/39 00:03:02 115416kN 1.Qh6+! +- (2.19) Depth: 12/39 00:03:02 115616kN 1.Qh6+! +- (2.82) Depth: 12/39 00:03:03 115922kN 1.Qh6+ Kxh6 +- (#11) Depth: 12/40 00:06:44 250243kN 1.Qh6+ Kxh6 +- (#11) Depth: 12/40 00:06:44 250378kN (Celeron 1.2GHz, 832MB hash, 3,4 and 5 piece EGTB's 31.12.2001)
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