Author: Steve Schooler
Date: 01:41:28 09/02/99
The Chessbase support notes indicate that the Fritz 5.32 engine is 10 times faster than the HiArcs 7.32 engine, because of HiArcs extensive "positional library". Based on recent postings, HiArcs 7.32 seems (generally) more powerful, despite it's "slowness". I believe further progress may be made by "merging" the two engines (algorithms). As the opening book is exited, use current HiArcs algorithm. As the game progresses and portions of the "positional library" become redundant, eliminate those portions from algorithm. During the game, as more portions of HiArcs positional library are eliminated from the algorithm its speed (nodes per second) should approach Fritz'. Perhaps I'm misunderstanding HiArcs' positional considerations and the hybrid strategy is not feasible. Alternatively, perhaps the hybrid simply requires reorganizing HiArcs' positional library. Pawn promotion considerations would be tricky. If the hybrid is feasible even greater improvement may be possible by adding a 3rd category within HiArcs' positional library; in addition to Relevant and Permanently Irrelevant (unless a pawn is promoted), also allow the category of Temporarily Irrelevant. At the start of the procedure used to evaluate a position (node), ignore the Permanently Irrelevant portion of the positional library, and (quickly) scan the remainder of the library to determine which portion may be classified as Temporarily Irrelevant. This would (hopefully) further limit the portion of the library that needs to be accessed when evaluating this node. Again, I may be badly misunderstanding HiArcs' positional considerations. I request general programmer feedback; I'm especially interested in Chessbase' reaction.
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