Author: Tony Werten
Date: 23:14:56 03/01/06
Go up one level in this thread
On March 01, 2006 at 16:05:06, Robert Hyatt wrote: >I am still using my old 12-bit history index <to><from> to index into these new >values. I also still maintain one for white and one for black. I once tried a >17 bit index <piece><to><from> but it offered no improvement to the basic >history heuristic, but I have not tested that with this reduction stuff. > >Any ideas what others are doing here? I can think of several possibilities: > ><piece><to> > ><piece><from> > ><to><from> (I am doing this now) > ><piece><to><from> > >to name at least 4. First two seem too simplistic. Last one turns the history >tables into pretty good sized arrays (2^17 for white, ditto for black). > It does only once if you use this to index a second table which returns an index only for actual legal moves. Tony >Note that I am essentially factoring in wtm already since I have two separate >sets of history tables for black and white.
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