Author: Robert Hyatt
Date: 11:26:39 11/16/00
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On November 16, 2000 at 13:13:50, Enrique Irazoqui wrote: >Is Crafty supposed to run in a different way with one or with more processors? >Using the Chessbase version of Crafty, I noticed fewer extensions in the search >on a single processor machine than on a dual. For example, 10/17 instead of >10/25 analyzing the same position. It may be a display bug too, I guess. > >Enrique That number is not produced from within crafty, so I don't have a clue. IE I don't have any concept of "base search / max extension depth" at all. I have no idea where they get that number from... perhaps they just take the normal Fritz number, which may say 10 plies full-width == 25 plies selective? or something similar. But to answer your first question last... no... the SMP search has absolutely no differences between it and the normal search. Other than the normal parallel instability caused by the shared transposition table. Extensions should be exactly the same... and in most cases, the PV and score will be identical...
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