Author: Robert Hyatt
Date: 18:22:15 01/03/98
Go up one level in this thread
On January 03, 1998 at 16:58:07, Don Dailey wrote: > > >About this: > >>Crafty is a "null-move" searcher. At shallow depths, null-move can hide >>simple threats quite easily. I used to see this when playing on ICC >>using >>a P5/133 machine. Once I moved to the P6/200 and tuned things better >>for >>that machine, skill went *down* on the P5. > >Are you tuning for the machine or the speed of the machine? It sounds >like you have something non-optimal in there somewhere. If you know >what you did you must be able to make the thing self adjust so it will >play close to optimal at any time control? > > >-- Don basically search speed. If you use null-move, and only search 5 plies, you will get killed easily with the famous Qh6 Pf6 threat that null move hides. But if you search faster, and can get to 7-8 at blitz, as I do on the P6, this doesn't get overlooked and I haven't lost a game to this problem in 2+ years now... but back on the P5 (slower P5's) I'd get killed at fast blitz... My stripped-down q-search works great at the depths I normally get (8+ in blitz, 10-11-12 in middlegames in decent time controls) but it works less "decently" at shallower depths, because it doesn't detect check or mate, and the basic search is too shallow to find them...
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