Author: Gerd Isenberg
Date: 13:56:42 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> I think worth to try. > ><piece><from> hmm.. that looks not so logically - but who knows. > ><to><from> (I am doing this now) actually i use that as well. > ><piece><to><from> that's what i intend to do as a waste product of my crude move indidics - quite move per color in a 4096 range. > >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. Sone additional depth left dependeny dimension comes in mind. Some additional index by some saturated division of depth for instance in a 0..3 range.
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