Author: Chrilly Donninger
Date: 23:16:50 12/12/05
I experimented recently with a Shredder-style search in Hydra. The single-processor Shredder/Hydra completly demolished Shredder. If two programs are similar, the strength difference is enlarged. Its therefore a bad idea to tune a programme against itself. But the Shredder/Hydra made only 40% against Rybka. Changing back to the standard Hydra-search its between 75-80%. Rybka is regularily "killed" in king-attacks. As noted before, this numbers are for Hydra-single-processor. The PC-programm is running on a 3.2 MHz Pentium 4. Time control is 30secs/move. A standard-opening set similar to the Nunn-openings is used. Changing the search is not only a tactical matter. The playing style is to a large extend also influenced by the search. If two moves are from the evaluation point similar, the programm usually plays the one with the larger search tree. Or in other words: The lines which are extended. The Shredder/Hydra played over-aggressive, whereas the classical Hydra with the right dose. One conclusion of my experiment is: Rybka seems to be fairly tuned against Shredder. This is always the fate of the leader of the gang. In the future other programs will be tuned against Rybka and it will be much more difficult to stay on the top. The experiment shows also, that it is fairly easy to tune against one programm. The problem is to find a solution which works against all. Chrilly
This page took 0.02 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.