Author: Heiner Marxen
Date: 16:52:38 07/06/01
Go up one level in this thread
On July 04, 2001 at 21:42:23, Pete Galati wrote: >On July 04, 2001 at 19:58:09, leonid wrote: > >>Hi! >> >>The next position you can solve practically with every program. >> >>[D]4Nb1q/R3P1qk/1R1Q1q2/1rQ2q1q/n1Q2qq1/P1Q1PqN1/K1BPp1b1/2Br2Qn w - - >> >>If you tried to find the mate, please indicate your result. >> >>Thanks, >>Leonid. > >This doesn't seem to take long to come up with. > >Pete > >New position >4Nb1q/R3P1qk/1R1Q1q2/1rQ2q1q/n1Q2qq1/P1Q1PqN1/K1BPp1b1/2Br2Qn w - - 0 1 > >Analysis by Junior 6.0: > >1.Qxa4 Qff7+ 2.Qab3 Rxc5 3.Bxf5+ > -+ (-24.07) depth: 3 00:00:00 21kN >1.exf8N+ Qfxf8 2.Bxf5+ Qhxf5 3.Rxg7+ Qgxg7 4.Qxg7+ > -+ (-8.13) depth: 3 00:00:00 95kN >1.Nxf6+ Qgxf6 2.exf8Q+ Kg6 3.Bxf5+ Qhxf5 4.Qdxf6+ > +- (2.11) depth: 3 00:00:00 173kN >1.Nxf6+! > +- (2.41) depth: 6 00:00:00 257kN >1.Nxf6+! Qgxf6 2.exf8Q+ Qfg7 3.Bxf5+ Qfxf5 4.Qcxg7+ Qgxg7 5.Qcxf5+ Qfxf5 6.Rxg7+ >Qxg7 7.Nxh5 > +- (7.73) depth: 6 00:00:02 1829kN >1.Nxf6+! > +- (8.03) depth: 9 00:00:05 4737kN >1.Nxf6+! Qgxf6 2.Bxf5+ Qf4xf5 3.exf8N+ Kh6 4.Qcxf6+ Qfxf6 5.Qxf6+ Qfxf6 6.Rxf6+ >Qgg6 7.Qf4+ Qhg5 8.Rxg6# > +- (#8) depth: 9 00:01:14 52086kN >1.Nxf6+ Qgxf6 2.Bxf5+ Qf4xf5 3.exf8N+ Kh6 4.Qcxf6+ Qfxf6 5.Qxf6+ Qfxf6 6.Rxf6+ >Qgg6 7.Qf4+ Qhg5 8.Rxg6# > +- (#8) depth: 9 00:01:33 66138kN Chest does confirm this result, it is the shortest possible mate here. After 4.5 minutes (K7/600, 250 MB hash) Chest found this PV: PV: Nxf6+ Qxf6 exf8=N+ Kh6 Nxf5+ Qfxf5 Qdxf6+ Qfxf6 Rxf6+ Qgg6 Rxg6+ Qxg6 Qxh8+ Qh7 Rxh7# Heiner
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