Author: Paul
Date: 12:45:00 04/17/01
Go up one level in this thread
On April 17, 2001 at 15:23:36, Paul wrote: >On April 17, 2001 at 14:45:49, Tim Foden wrote: > >>On April 17, 2001 at 11:13:02, Heiner Marxen wrote: >> >>>On April 17, 2001 at 07:43:30, leonid wrote: >>> >>>>Hello! >>>> >>>>If you like to solve very "regular" mate position, then you have one. >>>> >>>>[D]R7/4P1Pq/1rR5/2pb1rnk/1Q3B2/4Nn2/1PB2Np1/2K1b1Q1 w - - >>>> >>>>Please, indicate your result. >>>> >>>>Thanks, >>>>Leonid. >>> >>>According to Chest there are two key moves for mate in 7 moves: >>> >>>Qxg2 Bd2+ Qxd2 Bxc6 g8=Q Qxg8 Rxg8 Bd5 e8=Q+ Bf7 Nxf5 Nd4 Rxg5# >>>Rh8 Bd2+ Qxd2 Be4 e8=Q+ Rf7 Qxf7+ Nxf7 Qd5+ Bf5 Rxh7+ Nh6 Rhxh6# >> >>This is worrying to me, as Green Light thinks it finds another mate in 7, which >>begins with e8=Q+ >> >>As I understand it Chest finds all the mates, doesn't it? >> >>Here is a snippet of GLC's analysis (v2.14-pr7, hash 48M, Duron 880MHz): >> >> 8 26.25 320.983 16660k Bd1 Bd2+ Qxd2 Rxc6 Qh2+ Kg6 e8=Q+ Bf7 Qxh7+ Kxh7 >> g8=Q+ Bxg8 Qxg8+ Kh6 Nxf5+ Kh5 Qxg5# >> 8 51.62 320.987 38611k e8=Q+ Bf7 Qxg2 Rxc6 Qg4+ Kg6 Qxf5+ Kh5 Qexf7+ Rg6 >> Qg4+ Kh6 Nf5# <ht> >> 8 55.91 320.987 42689k e8=Q+ Bf7 Qxg2 Rxc6 Qg4+ Kg6 Qxf5+ Kh5 Qexf7+ Rg6 >> Qg4+ Kh6 Nf5# <ht> >> 9 1:00 320.987 47464k e8=Q+ Bf7 Qxg2 Rxc6 Qg4+ Kg6 Qxf5+ Kh5 Qexf7+ Rg6 >> Qg4+ Kh6 Nf5# <ht> >> 9 1:31 320.987 77248k e8=Q+ Bf7 Qxg2 Rxc6 Qg4+ Kg6 Qxf5+ Kh5 Qexf7+ Rg6 >> Qg4+ Kh6 Nf5# <ht> >> 10 1:51 320.987 96843k e8=Q+ Bf7 Qxg2 Rxc6 Qg4+ Kg6 Qxf5+ Kh5 Qexf7+ Rg6 >> Qg4+ Kh6 Nf5# <ht> >> >>Cheers, Tim. > >I also found such a mate in 7, but not with a regular search, let's say in >special mode: > >e8=Q+ Bf7 Qxg2 Bd2+ Qxd2 Rxf4 Qxf7+ Nxf7 Bg6+ Qxg6 Qxg6+ Kh4 Ng2# > >but since I really still do have a bug somewhere, I didn't dare posting it! >Oh well ... now I've done it ... shoot, Heiner :) > >Groetjes, >Paul Forgot to say that the regular search found a mate in 8: 00:17 WM8 08 e8=Q+ Rf7 Qxg2 Bd2+ Qxd2 Rxc6 Qg4+ Kh6 Qh3+ Nh4 Qxh4+ Kxg7 Qxh7+ Nxh7 Qh8# Paul
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