Author: Robert Hyatt
Date: 20:45:17 01/05/01
Go up one level in this thread
On January 05, 2001 at 14:44:43, Dann Corbit wrote: >On January 05, 2001 at 14:41:51, David Rasmussen wrote: > >>I was wondering why some of the clever ideas I've been reading about, aren't >>used in the programs I know of. >> >>ETC, Enhanced Transposition Cutoff, seems like a very good idea and have been >>tested to perform well in practice. Why isn't it used? > >Where is an article on this technique that I might read? > >I've never heard of it. The idea is this: generate all the moves for the current ply, after you have noted that the hash probe here failed. Try each move to see if the resulting position results in a hash hit that will cause a cutoff. If so, you can save some time by not searching since that might be good enough to stop the search at this ply completely. The savings are obvious. The cost is the work done to update the hash signature for each move at this ply, and then doing N hash probes...
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