Author: Uri Blass
Date: 07:25:36 06/18/01
Go up one level in this thread
On June 18, 2001 at 10:01:45, Ulrich Tuerke wrote: >On June 18, 2001 at 08:54:10, Uri Blass wrote: > >>On June 18, 2001 at 08:33:21, Ulrich Tuerke wrote: >> >>>On June 18, 2001 at 08:28:08, Bas Hamstra wrote: >>> >>>>On June 17, 2001 at 01:09:50, Robert Hyatt wrote: >>>> >>>>>On June 16, 2001 at 22:59:06, Vincent Diepeveen wrote: >>>>> >>>>>>Hello, >>>>>> >>>>>>From Gian-Carlo i received tonight a cool version of crafty 18.10, >>>>>>namely a modified version of crafty. The modification was that it >>>>>>is using a small sense of Singular extensions, using a 'moreland' >>>>>>implementation. >>>>>> >>>>> >>>>> >>>>>Instead of modifying Crafty to simulate Deep Blue, why didn't you >>>>>modify Netscape? Or anything else? I don't see _any_ point in >>>>>taking a very fishy version of crafty and trying to conclude _anything_ >>>>>about deep blue from it... >>>>> >>>>>Unless you are into counting chickens to forecast weather, or something >>>>>else... >>>> >>>>I don't agree here. It is fun. Maybe not extremely accurate, but it says >>>>*something* about the efficiency of their search, which I believe is horrible. I >>>>think using SE and not nullmove is *inefficient* as compared to nullmove. We >>>>don't need 100.0000% accurate data when it's obviously an order of magnitude >>>>more inefficient. >>> >>>May be you are right, if the program is running on a PC. However if you can >>>reach a huge depth anyway because of hardware, may be you can afford to use >>>this, because it doesn't matter too much wasting one ply depth ? >> >>It is not about wasting one ply but about clearly more than it and >>it is clear that not using null move is counter productive when the difference >>becomes bigger and not smaller at longer time control so the fact that they had >>better hardware only supports using null move. > >How can you be so sure ? Do you really know that all of the top programs are >using null move. I wouldn't bet too high on this. There may be viable >alternatives to this, though not being published. I know that Junior and Rebel do not use null move but they use other pruning techniques. I do not believe that the technique of no pruning+singular extension is good at long time control and this is the point. Uri
This page took 0.01 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.