Author: Robert Hyatt
Date: 19:17:52 06/19/04
Go up one level in this thread
On June 17, 2004 at 09:56:53, Ed Trice wrote: >Hello Jim, > >>I believe to directly answer your question, there is no switch. If Crafty can >>find the EGTB files and you have allocated some memory for them then it will use >>the files in it's search. Simply testing the engine with 5 men will tell you if >>it can find/use the files. It should also show probes during search with more >>than 5 men if given enough time. >>Jim > >This is what I would expect as well, but I have all evidence to the contrary. I >will work on providing some tests with FEN diagrams today. > >Thank you. Crafty probes tables deep into the tree, but not in the q-search. It always has. The trick to make this work is that you only probe under the following conditions: 1. only probe a position which has N pieces or less, where you have N pieces on the board; 2. only probe after a capture. If you didn't capture, then either the current is already a table position and you would not be searching, or else it is a position for a table you don't have. To summarize, crafty only probes after a capture, as any other probes would be a waste of time...
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