Author: leonid
Date: 14:43:07 10/06/01
Go up one level in this thread
On October 06, 2001 at 16:23:47, Paul wrote: >On October 06, 2001 at 05:07:58, Tim Foden wrote: > >>On October 05, 2001 at 16:02:14, Paul wrote: >> >>>On October 05, 2001 at 12:59:56, leonid wrote: >>> >>>>Today, after good explantion of how it must be done, I installed Chest (Heiner's >>>>mate solver). It do the wonders on brute force search. I went to see some >>>>positions that otherwise will be too slow for me to solve. It could be that you >>>>can help me with one position. Your computer and hash could make solution more >>>>speedy. Mine is Celeron 600Mhz, 64M. This position is actually one from three >>>>similar positions one of which went to Web. This last was left as less >>>>accessible. Just say me how far you went, or what solution you found. >>>> >>>>[D]kq4BK/pq4QQ/2qqnP2/1NnqQnN1/2QBqB2/5r2/RQ4qr/RQ4bb w - - >>>> >>>>Thanks, >>>>Leonid. >>> >>>For now here's what Pretz found: >>> >>>00:40 WM12 12 Rxa7+ Q8xa7 Rxa7+ Kb8 Ra8+ Kxa8 Q1a1+ Qca6 Qxa6+ Nxa6 Qc8+ Qdb8 >>>Qexb8+ Nxb8 Nc7+ Nxc7 Qxb8+ Qxb8 Qxb8+ Kxb8 Qxc7+ Ka8 Qb8# >>> >>>A mate in 12 in 40 seconds. >> >>Pretz did very well to find a mate in 40 seconds! Green Light took over 6 >>hours! > >Oops! Now I'm worried ... usually you're pretty fast also! > >When I posted my solution yesterday, Leonid said he'd found a mate in 13, so I >was a bit worried then too. Checked my solution with hash switch off, and got >the same result in about 5 minutes, so I was pretty sure my mate was correct. > >Now I'm in doubt again ... naah, I'm no lumberjack ... but I'm ok! ;) > >> 10 20:53 ++ 671083k Qxb7+ (a=21.81 b=22.61 e=22.61) >> 10 39:20 +29.914 1392m Qxb7+ Qbxb7 Rxa7+ Kb8 Ra8+ Qxa8 Nxd6+ Qxb2 Qxb2+ >> Rb3 Rxa8+ Qxa8 Qbxb3+ Qab7 Ndxe4+ Qxe5 Bfxe5+ Nc7 >> Bxc7+ Ka8 Qxb7+ Kxb7 Nxc5+ Ka8 Bxh2 Bxd4 Qxf5 >> 10 6:04:59 +Mate12 13318m Nc7+ Qcxc7 Rxa7+ Q8xa7 Rxa7+ Kb8 Rxb7+ Qdxb7 Qxb7+ >> Qexb7 Qxb7+ Kxb7 Qxc7+ Nxc7 Qb5+ Kc8 Qee8+ Nxe8 >> Qxe8+ Qd8 Qc6+ Qc7 Qxc7# >> 10 6:24:27 +Mate12 14263m Nc7+ Qcxc7 Rxa7+ Q8xa7 Rxa7+ Kb8 Rxb7+ Qdxb7 Qxb7+ >> Qexb7 Qxb7+ Kxb7 Qxc7+ Nxc7 Qb5+ Kc8 Qee8+ Nxe8 >> Qxe8+ Qd8 Qc6+ Qc7 Qxc7# >> 11 8:12:18 +Mate12 19413m Nc7+ Qcxc7 Rxa7+ Q8xa7 Rxa7+ Kb8 Rxb7+ Qdxb7 Qxb7+ >> Qexb7 Qxb7+ Kxb7 Qxc7+ Nxc7 Qb5+ Kc8 Qee8+ Nxe8 >> Qxe8+ Qd8 Qc6+ Qc7 Qxc7# >> 11 10:00:11 1/73 Rxa7+ >exit >> >>Cheers, Tim. > >I see you went on to find a shorter mate ... Chest just finished searching for a >mate in 11 ... wasn't there! It took 6h45m. Thanks, Paul, for eleven! This could signify that it is mate in 12. On my computer these 7 hours could easily go up to 10 hours. Cheers, Leonid. >Thanks again for helping with my hash-mate-bug, >Paul
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