Author: Dezhi Zhao
Date: 22:08:47 03/01/06
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If you want to try adding another dimension to the history table, I think the ply number is the best candidate. You just replace the side index with the ply number. This will greatly localize the histroy table and probally make it more useful. We can call it history killer table by doing so:) 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). > >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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