Author: leonid
Date: 17:00:10 09/03/00
Go up one level in this thread
On September 03, 2000 at 17:01:31, Eelco de Groot wrote: > >Hi Leonid! I'm not sure I understand all the magical tricks you are performing >with your program but it sure does sound impressive! Especially in the last bit >where you find a mate between 0.5 and 1 second. I understood that as something >that you maybe give the first move of the solution and your program then >selectively has to find the rest of the solution. But maybe I have that wrong >and you meant there that you have different versions of selective search and >that one version does not solve it? There are no magic trick. I worked on this part of my program for around 3 years. After this it became more rapid in mate solving that every other possible program. At least, after my statistics. Selective search is now simple in structure. I created around 50 of them but left in program only four. Selective version that found this mate was done by seeing few plys deep by brute force (this is why I worked for so long with my brute force and move generator) and only later started selective search. This make magic trick. The other position in 6 moves, I don't remember how long it took. Could verify. But it should be below one second. >I do not understand either why Rebel 10 cannot find the mate in the same time! I >do not have Rebel 10 installed on this computer yet so I can not check it myself >now. I do remember Ed saying that for Rebel versions older than Rebel 10c 13Mb >hashtables, not more, was the optimal setting. Sometimes changing the amount of >transposition tables can make a difference how fast the program finds the best >move. I remember for sure that Rebel 10 took position (crazy one) in around 11 minutes by brute force. Time was very good. Maybe I screw my Rebel when looking how I must use its e-mail capability. >Regards, Eelco With my respect, Leonid.
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.