Author: blass uri
Date: 08:22:46 08/04/98
Go up one level in this thread
On August 04, 1998 at 10:20:56, Komputer Korner wrote: >On August 04, 1998 at 00:45:41, blass uri wrote: > >> >>On August 03, 1998 at 23:58:25, Ilya P. Kozachenko wrote: >> >>>On November 09, 1997 at 11:31:49, Alvaro Polo wrote: >>> >>>>I wonder if a chess program could be made which used two different >>>>strategies in parallel (using two processors). >>>> >>>>On the one processor it would run a very knowledge based algorithm, >>>>something like CSTal appears to be. >>>> >>>>On the other processor it would run a fast and deep searcher. The >>>>tactical lines would be found by this second algorithm and forwarded to >>>>the knowledge based one signaling them as lines to avoid. >>> >>>On November 09, 1997 at 14:38:40 Robert Hyatt wrote: >>> >>>>this has been done. See "Phoenix" by Jonathan Schaeffer. He used two >>>>parallel search engines, one a full-blown search+eval, the second an >>>>aggressive null-move search with material-only, which could search a >>>>couple of plies deeper than the other. It worked, but only "so-so" >>>>because >>>>the fast search can find tactical things, but not positional things. So >>>>it >>>>could find a way to win a pawn, but wreck the position in the process. >>>>Or >>>>find a way to defend the pawn, but wreck the position. It was hard to >>>>"coordinate" the two searches to decide which is correct... >>> >>>And what about next idea?: >>> >>>Since hard coordinating let's use 2 different algorithms not in >>>parallel. >>>Program could define whether position is "more tactical" or "more >>>positional" and apply corresponding algorithm. >>>We would obtain a program with 2 kinds of play available, which >>>changes its style during the game (like DeepBlue :) and isn't worse >>>than good "knowledge-based" or "speed-based" program alone. >>>Any suggestions, please. >>> >>>WBW, Ilya. >>I think giving fritz to play if it can come to big depth and giving Junior >>to play in the other cases can create a better program than both of them. >> >>Uri > >This whole idea is aready being done with the Fritz 5 GUI. If you insert Fritz 5 >as the tactical engine and Hiarcs 6 as the positional engine the program will >decide which one to use in a given position in a game. I have seen it do this . >It works. AS to how much better it plays, that is a BIG question. Probably >Junior 4.6 can be tried this way but I haven't actually tried Junior doing this >yet. Has anybody tried it with Junior and Fritz ? >-- >Komputer Korner I did not try it with Junior and fritz but I noticed that when fritz sees to big depth it is better than other programs and junior can often see more if it does not go to big depth Uri
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