Author: Heiner Marxen
Date: 06:23:33 08/08/01
Go up one level in this thread
On August 08, 2001 at 08:56:52, leonid wrote: >On August 07, 2001 at 13:33:24, Heiner Marxen wrote: > >>On August 04, 2001 at 15:56:13, leonid wrote: >> >>>On August 04, 2001 at 15:13:24, Angrim wrote: >>> >>>>On August 04, 2001 at 09:01:36, leonid wrote: >>>> >>>>>Hi! >>>>> >>>>>Are you ready for solving some mate? Here is one: >>>>> >>>>>[D]q1qk1q1q/q1qrrq1q/1bQq1Qb1/1Q1QQ1Q1/BNn2nNB/1Q4Q1/3Q4/R2K3R w - - >>>>> >>>>>Please indicate your result. >>>>> >>>>>Thanks, >>>>>Leonid. >>>> >>>>proved that move f6xe7 wins, 12 turns >>>>PN2:4523172 evals, 98612 expands, 30.16 seconds >>> >>>This time we found mate by selective at the same depth but your probably is more >>>quick. >>> >>>12 moves selective in 105 sec. Celeron 600. No hash. >>> >>>By brute force I stopped searching before 8 moves. 7 moves took 18 min and 57 >>>sec. >> >>Hello Leonid, hello Angrim! >> >>Unfortunately, Chest is not much faster: "no mate in 8" after 38.1 minutes >>on a K7/600 with 350 MB hash. The effective branching factor is beetween >>8 and 10, so more depth would cost a lot of time. And depth 12 is not >>reachable for Chest, here. Sorry. >> >>Cheers, >>Heiner > >Hi, Heiner! > >Thanks for 8 moves! > >My branching factor was 9.37, 9.96 and 11.67 between 4 moves and 7, that I look >by brute force. Your branching is lose to mine or better. Corresponding values for Chest: 11.69, 8.44 and 9.87. About equal. >My time was, starting with 4 moves: 1.043 sec, 9.78 sec, 97 sec, 18 min 57 >sec. Corresponding values for Chest: 0.29s, 3.39s, 28.61s, 282.51s (4 min 42 sec) Interestingly, the mate in 4 is already faster for Chest, while more depth does not change much, in this case. Cheers, Heiner
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