Author: leonid
Date: 09:57:15 02/11/01
Go up one level in this thread
On February 11, 2001 at 12:23:35, Heiner Marxen wrote: >On February 11, 2001 at 08:19:40, Tim Foden wrote: > >>On February 11, 2001 at 07:41:00, leonid wrote: >> >>>Hi! >>> >>>If you like to solve a mate, you can try the next one: >>> >>>[D]3n1nbk/5qpp/2Q2nq1/1pbQNBB1/p1p1QNn1/2B2Q2/1PP1P3/2K4R w - - >>> >>>Please, say your result. >> >>Hi Leonid, >> >>Green Light Chess v2.13-pr1 finds a mate in 9 ater 10.51 seconds, >>and then finds a shorter mate in 8 after 20.73 seconds. It sticks >>with this for a full 15 mins. I guess we'll have to wait for other >>results to see if a shorter mate is found, or proven not to exist by >>chest. > >Ok, here is my part of the performance: There is no mate in 7 according >to Chest (32.7 minutes, K7/600, 350MB hash). >As a mate in 8 is found, already, I'm not going to ask Chest for it. >Effective branching factor for Chest is around 16, here. Thanks, Heiner! Now I can place this position as 8 moves. Even if I have many positions for possible verification, it is all the time useful to have some for future use. I remember that some books that I used for verifying my mate solver were full of mistakes. It could be that now (5 years later) it is no more the case. Salut from Montreal! Leonid. > >Heiner > > >>Cheers, Tim. >> >>Analysis, GLC 2.13-pr1, 24MB hash, 920MHz Duron: >> >>>anal >> Game stage: Opening >> Current eval: 18.38 >> Ply Time Score Nodes Principal Variation > >> 8 5.21 ++ 3602654 Nfxg6+ (a=35.84 b=36.84 e=36.84) >> 8 10.51 320.83 7709270 Nfxg6+ Nxg6 Nxg6+ Qxg6 Qxg8+ Kxg8 Bxg6 Bf8 Qcd5+ Kh8 >> Rxh7+ Nxh7 Qg8+ Kxg8 Bxh7+ Kh8 Qxf8# <ht> >> 8 16.66 320.83 13745k Nfxg6+ Nxg6 Nxg6+ Qxg6 Qxg8+ Kxg8 Bxg6 Bf8 Qcd5+ Kh8 >> Rxh7+ Nxh7 Qg8+ Kxg8 Bxh7+ Kh8 Qxf8# <ht> >> 9 20.73 320.85 18003k Nfxg6+ Nxg6 Nxg6+ Qxg6 Qxg8+ Kxg8 Bxg6 Bf8 Qee8 Nxc6 >> <ht> >> 9 33.64 320.85 31079k Nfxg6+ Nxg6 Nxg6+ Qxg6 Qxg8+ Kxg8 Bxg6 Bf8 Qee8 Nxc6 >> <ht> >> 10 46.11 320.85 44792k Nfxg6+ Nxg6 Nxg6+ Qxg6 Qxg8+ Kxg8 Bxg6 Bf8 Qee8 Nxc6 >> Bxh7+ Kh8 Qxf8+ Ng8 Qxg8# <ht>
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