Author: Paul
Date: 07:34:45 04/17/01
Go up one level in this thread
On April 17, 2001 at 06:41:36, Heiner Marxen wrote: >On April 14, 2001 at 11:25:53, Paul wrote: > >>On April 14, 2001 at 10:37:06, leonid wrote: >> >>>Hello! >>> >>>If you like to solve one mate (or if you want to selebrate Passover by >>>crucifying your solfware) then this position is just for you: >>> >>>[D]1qRr2bk/Q1P1q1bq/4Qn1N/3qq1Qn/KRQ1Qq1N/B2B4/6Qq/2q3r1 w - - >>> >>>Please, indicate your result. >>> >>>Thanks, >>>Leonid. >> >>The first thing Pretz says is this (mate in 13): >> >>11:34 WM13 10 Qxg8+ Qhxg8 Ng6+ Kh7 Nxe5+ Kh8 Ng6+ Kh7 Nxe7+ Kh8 Qh7+ Qxh7 >>cxd8=Q+ Ne8 Qxe8+ Bf8 Qad4+ Qbe5 Qdxe5+ Qfxe5 Qxf8+ Qhg8 Qfxg8+ Qxg8 Rxg8# >> >>Will try some different extensions later ... >> >>Groetjes, >>Paul > >That is interesting, since according to Chest this is indeed a mate in 13. >After 5 hours (K7/600, 350MB hash) Chest gives this PV: > >Qxg8+ Qhxg8 Ng6+ Kh7 Nxe5+ Kh8 Ng6+ Kh7 Nxe7+ Kh8 Ng6+ Kh7 Ne5+ >Nxe4 Qgxe4+ Kh8 Qh7+ Qxh7 cxd8Q+ Qf8 Qxf8+ Qhg8 Qxg8+ Qxg8 Nhf7# > >The effective branching factor was quite good for Chest, between 2.7 and 5 >most of the time (for a full move). But ETC (enhanced transposition cutoff) >was extremely useless (5% hit rate). I have no idea, why. It seems like Chest is getting faster al the time! Maybe that short vacation did the trick! For a mate in 13 that's pretty fast ... >Hi Paul, you are right, I've been away for a week, visiting my brother's >family in Switzerland, but I did not expect someone to take notice ;-) I notice everything! :) You were sorely missed ... oh dear, Switzerland, the Alps! If you need a travel companion the next time, errmm ... :) >Now I will scan through a full week of CCC... > >Cheers, Heiner Groetjes, Paul
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