Author: Will Singleton
Date: 18:39:26 10/25/05
Go up one level in this thread
On October 25, 2005 at 19:44:58, Dann Corbit wrote: >On October 25, 2005 at 14:56:43, Will Singleton wrote: > >>On October 25, 2005 at 12:56:43, Dann Corbit wrote: >> >>>On October 25, 2005 at 12:28:07, Lar Mader wrote: >>> >>>>I realize that this is a difficult question... >>>> >>>>I'm curious about what makes Fruit 2.2 so strong. Also, it is impressive how >>>>quickly Fabien achieved this strength. Fritz 9 and Shredder 9 seem to be close >>>>to Fruit 2.2 in strength, and yet they have been in development for a much >>>>longer time with a lot more resources. Has anyone spent any time examining the >>>>2.1 source code, or have any other insights into what this program does that >>>>makes it so effective? >>> >>>Fabien does everything well. He is a magnificent and careful programmer. He >>>obviously puts a lot of effort into making things correct. He has a lot of >>>insight to pick out what is important and concentrate on that. >>> >>>His search is excellent and innovative. He does some things that nobody else >>>does. I'm not really sure how he is able to not hash the PV and still have a >>>stupendously fast search, but that is pretty amazing. >>> >><snip> >> >>I haven't looked at Fruit's code, but I'm interested in your pv comment. What >>is the difference between storing the pv to hash, and simply playing the pv out >>of an array? > >What is more important in move ordering than being a pv node? Perhaps I wasn't clear. afaik, the purpose of storing the pv to hash is to enable the pv moves to be played first. Whether you store them to hash or to a special pv array shouldn't matter, if you recognize a node as a pv node and play the pv move. If we are in agreement on that (and perhaps I'm missing something), then are you saying that Fruit doesn't make use of its pv for move-ordering at all? I would find that unusual. Will
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.