Author: Paul
Date: 13:26:00 10/06/01
Go up one level in this thread
On October 06, 2001 at 07:46:17, leonid wrote: >On October 05, 2001 at 17:25:22, Paul 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. >>> >> >>As an exception to my general rule :), I've now tried this one with Chest. Just >>finished the search for a mate in 10 without result, but in light of the times >>and factors I can't start a mate in 11 search now, maybe tomorrow. >> >>Depth Seconds Factor >> >>6 .48 >>7 3.32 6.9 >>8 28.12 8.5 >>9 266.92 9.5 >>10 2348.34 8.8 11 24313.68 10.4 <--------------------------- new data! >>So depth 11 could take about 6 hours. > >Thanks, Paul! Now for me only 11 moves is not sure. > >Cheers, >Leonid. Chest just reported there's no mate in 11. Took 6 hours and 45 minutes! Groetjes, Paul
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