Author: John Scalo
Date: 10:15:25 12/30/97
Maybe it's because I don't have any sort of SEE, only a <small takes big>/<equal exchange>/<big takes small> ordering, but I see a *huge* explosion in my qsearch which is captures only (no checks). I regularly hit depths of 20+ not including plies in the regular search. First off, I'm wondering if the pros around here hit those depths in their qsearch? I'm also wondering if anyone has experimented with limiting the qsearch. After examining the qsearch dives to ply 10 and beyond, I found that the exchanges are just garbage combinations that would never get played. So I limited my qsearch to a depth of five ply and don't consider "big takes small" captures at the final ply, since those will most likely be bad moves. In this scheme, the program is three or four times faster and in initial testing doesn't appear to be any worse in strength! Has anyone else tried this? What are the possible negative effects besides the occasional tactical miss? Thanks! -j
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