Search found 1215 matches

by mjlef
Thu Jun 07, 2007 9:25 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Revisiting Check Extensions
Replies: 18
Views: 10758

Revisiting Check Extensions

Most programs I have seen seem to extend checks exactly one full ply. Some also extend one reply to checks another full ply (or sometimes less). A very few use an extession of 3/4 a ply. In my continuing experiments in my program, I have tried to come up with different criteria, and in testing they ...
by mjlef
Tue May 29, 2007 12:11 pm
Forum: Computer Chess Club: General Topics
Topic: Participants WCCC 2007
Replies: 108
Views: 49266

Re: Participants WCCC 2007

Gerd Isenberg wrote: No idea whether the Sleep In still exist, but no need to take an expensive hotel. There are nice camping sites near by.
Ah, but do the camp site have electric sockets and high speed Internet access! Programmers will wither and die without them!
by mjlef
Sat May 19, 2007 2:23 pm
Forum: Computer Chess Club: General Topics
Topic: Kamsky's notebook failure
Replies: 2
Views: 1379

Re: Kamsky's notebook failure

He is supposed to get another notebook tomorrow, and I will help him install the software on it. (I live in Sofia).
by mjlef
Sat May 19, 2007 2:20 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: winboard/ICC issue
Replies: 4
Views: 3579

Re: winboard/ICC issue

I have also seen another strange thing on ICC. I will +noplay a player (so I can play another program and make sure the program does not automatically accept a game from them), but after a game, ICC will start another game with the last opponent. I have had to disconnect to just prevent an endless n...
by mjlef
Wed May 16, 2007 1:41 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: a beat b,b beat c,c beat a question
Replies: 9
Views: 6505

Re: a beat b,b beat c,c beat a question

The solution is simple, never, ever play version X+2 of any program versus version X and cause this loop of confusion. If you do this it will just give you a headache! I know it has me!
by mjlef
Wed May 16, 2007 10:02 am
Forum: Computer Chess Club: Tournaments and Matches
Topic: Toga II 1.3 with HT=80
Replies: 2
Views: 1412

Re: Toga II 1.3 with HT=80

According to http://www.computerchess.org.uk/ccrl/404/ HT=80 is the best Toga version. I played 6*20 games against same engines to check. First default (HT=75): Toga II 1.3 - Rybka 2.3.1 32-bit 7.0 - 13.0 +5/-11/=4 35.00% Toga II 1.3 - Fritz 10 7.5 - 12.5 +5/-10/=5 37.50% Toga II 1.3 - Deep Sjeng 2...
by mjlef
Thu May 10, 2007 1:36 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: About pawn hash tables
Replies: 6
Views: 6178

Re: About pawn hash tables

In NOW, I also use both opening and endgame evaluations, but I do not interpolate for each individual feature. That would be a hundred or so multiplcations and divisions depending on the number of features measurd. I just sum all opening and endgame scores in two different variables and store them i...
by mjlef
Thu May 10, 2007 11:37 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Clone Solution: SOLOPO
Replies: 1
Views: 2789

Clone Solution: SOLOPO

Perhaps the best way to secure a program is to use an obscure programming language like SOLOPO: http://theshredder.com/archive/mir2.html In Russian, SOLOPO stands for Sotsialistichesky Ordena Lenina Organ Programmnogo Obespecheniya, rendered in English as "Socialist Software Tool decorated by Order ...
by mjlef
Mon May 07, 2007 6:23 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Advice on stabalizing the eval needed
Replies: 11
Views: 11113

Re: Advice on stabalizing the eval needed

In RomiChess the piece/square tables are created dynamically before each search. This can lead to some extreamly unbalanced evals leading to things like bad sacrifices and other pathalogical behaviors. So, what is best, limiting each square to a maximum or adding up all the squares and scaling them...