Author: Leen Ammeraal
Date: 09:45:30 12/06/00
I have the impression that most chess programmers use their hashtables to store only one evaluation value, along with a flag denoting Lower, Upper, or Exact. Why not store both a lower and an upper bound, where lower = -inf or upper = +inf if only one real bound is available? A flag is then superfluous, since this follows from the two bound values. For example: LB UB Flag value (not stored) -inf 100 Upper -20 +inf Lower 30 30 Exact This also offers the possibility to store two different bounds at the same time, as in LB = -50, UB = 70. This is the way I do it, but, unfortunately, my program is weaker than most others. Could this be because this idea of storing two bounds and no flag is wrong? Leen Ammeraal
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