Author: Paul
Date: 12:16:29 05/06/01
Go up one level in this thread
On May 06, 2001 at 13:26:26, Heiner Marxen wrote: >On May 06, 2001 at 11:55:05, Paul wrote: >>06:18 WM9 09 Bxc7+ Qbxc7 Qxc7+ Qxc7 Qxd6+ Qcxd6 Nxe6+ Qexe6 Qfxf6+ Re7 Rxd6+ >>Qxd6+ Qxd6+ Bd7 Qhxf8+ Qxf8 Qcc7# > >Well, 6:18 is not exactly fast, right? >I will try this one later, have started with the second one. See below. For me everything within 1 hour is ok ... but for a mate in 9 it isn't lightning fast, no. >>No ... it wasn't too hard, Leonid! You must really be a nice guy, thinking about >>our feelings like that, thanks! ;) > >The one who tortures us daily with bizarre mate problems? :-)) Ahh ... for me it's more of a social event, keeps me from doing "cats-evil" as we call it (mischief). :) >But seriously: if they are too hard, he will not get much helpful response. >OTOH, we may feel pressed to improve our programs... I hope to get mine as good as Chessmaster & Junior in solving mates! Well ... I can always dream, can't I? ;) Johan ... als je dit leest ... any tips? :) >>00:04 WM6 06 Qxc7+ Nxc7 Nxd6 Nxa5 Qxd7+ Nxd7 Nc6+ Nxc6 Ncb7+ Qxb7 Nxb7# > >For sure it really is a mate in 6: >ChestMate = Pretzmate /* -1 */; /* bugfix by Heiner */ // darn another one! Thanks Heiner! >It has multiple solutions, there are 6 key moves: >Bxc7+ Nxc7 Qxc7+ Bxc7 Bxf7 Bxd5 Nxc6+ Nxc6 Rxe8+ Qxe8 Qxe8# >Bxf7 Nxc5 Nxc6+ Nxc6 Q7xc6 Bd7 Rxe8+ Bxe8 Qexe8+ Qxe8 Qxe8# >Nxc7 Bb3+ Qxb3 Nxc7 Nxc6+ Nxc6 Qbxf7 Nce5 Qxd7+ Nxd7 Qxd7# >Nxd6 Naxb6 Q7xb6 Nxa5 Nexf7+ Bxf7 Nf4 Bb3+ Qxb3 Ne5 Ndb7# >Qxc7+ Nxc7 Bxc7+ Bxc7 Bxf7 Bxd5 Nxc6+ Nxc6 Rxe8+ Qxe8 Qxe8# >Qxf7 Qxf7 Nxf7+ Bxf7 Nxd6 Nde5 Nxf7+ Nxf7 Nxc7+ =*= N7e6# > >That took 28.4 minutes (!) (K7/600, 350MB hash) > >depth seconds ># 3 0.15 0.99 386- 0 ># 4 4.19 1.25 9199- 0 ># 5 95.47 1.55 219507- 0 ># 6 1704.26 1.86 4219473- 9977 > >Chest needed an average of 2.5 black moves to refute at the top level, >what is unusually large, and contributes to the comparatively large time. But impeccable as always! Paul
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