Author: Uri Blass
Date: 11:40:27 01/25/01
Go up one level in this thread
On January 25, 2001 at 14:11:36, Peter McKenzie wrote: >On January 25, 2001 at 08:20:26, David Rasmussen wrote: > >>Howdy. >> >>Inspired by the thread on extensions, I was wondering whether the idea of >>negative extensions or reductions could be a good one. >> >>I mean, maybe many of the "unsound" pruning methods would be sounder if, instead >>of just pruning, they just adjusted the resulting depth down. In that way, a >>line would still be examined, only later. > >Hi, in the past I have thought of negative extensions too although I haven't >tried implementing them yet. I wouldn't consider nullmove to be a negative >extension, its not really in the spirit of an extension - I'd just call it a >pruning method. > >In my mind, extensions are usually a move based thing. By this I mean that we >can see some property of the move we have just played (or are just about to >play, depending on exactly how you implement the extension) which indicates that >we should extend. Obvious examples are >- check extension >- recapture extension >- single response extension >- passed pawn push extension > >So the question is, what sort of moves could be candidates for a negative >extension? Wasting tempos espacially if you lose more than 1 tempo(lines like Ra1-c1-b1-a1 for white are good candidates for a negative extension) Uri
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.