Author: Heiner Marxen
Date: 14:33:26 12/23/02
Go up one level in this thread
On December 23, 2002 at 17:17:24, Robert Pope wrote: >On December 23, 2002 at 15:16:44, Mike Byrne wrote: > >>[d]R6R/3Q4/1Q4Q1/4Q3/2Q4Q/Q4Q2/pp1Q4/kBNN1KB1 w - - 0 1 >> >>So far , every Palm program and Chess Tiger have fatal errors with this >>position. Supossedly, this is the largest number of possible legal number of >>moves, 218, available from one position in chess. If you can prove this wrong, >>you'll go down in History. >> >>http://www.rescon.de/Compu/schachzahl2_e.html > > >Can I get some people to run perft numbers on this position? Beaches correctly >says 218 legal moves, and finds xxx. But then it gives these odd perft >statistics: > >perft 1: 218 >perft 2: 99 ????? Maybe because for many of the 218 moves, no response is >possible? >perft 3: 19073 >perft 4: 85043 Yes, Chest agrees completely: FEN: R6R/3Q4/1Q4Q1/4Q3/2Q4Q/Q4Q2/pp1Q4/kBNN1KB1 w - - Counting width of legal tree, 4 plies deep... Time (user) = 0.05 sec dep #nodes quot sum nodes 0 1 [ 0.000] 1 1 218 [218.000] 219 2 99 [ 0.454] 318 3 19073 [192.657] 19391 4 85043 [ 4.459] 104434 Cheers, Heiner
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