Search found 3463 matches

by lkaufman
Tue Feb 09, 2010 8:05 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Firebird 1.0 and 1.01: 180 games.
Replies: 67
Views: 11948

Re: Firebird 1.0 and 1.01: 180 games.

You don't set any time limit, only fixed depth limit. Try setting Robbo for eight plies and Rybka 3 for five plies. You will need to use a book that has hundreds of openings, and of course play each opening twice, once with each color. I suppose the exact result may differ depending on the book used...
by lkaufman
Tue Feb 09, 2010 5:46 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Firebird 1.0 and 1.01: 180 games.
Replies: 67
Views: 11948

Re: Firebird 1.0 and 1.01: 180 games.

"Robbo (and I presume also Firebird) is much faster than Rybka 3 but with lower quality, How can it play better than ? so it will often see a ply deeper but with less positional knowledge and missing some tactical things as well ??? Examples please" An extra ply is very important in computer chess. ...
by lkaufman
Tue Feb 09, 2010 4:24 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: An Unexpected Rybka vs. Robbo result
Replies: 14
Views: 1804

Re: An Unexpected Rybka vs. Robbo result

No, I suppose it's possible that at 40/x instead of increment Robbo would not misbehave at super-short controls, but I'm convinced that such super-short levels are only valid if you know that the time management code of both engines being compared is the same at all levels. So I think we'll continue...
by lkaufman
Tue Feb 09, 2010 6:15 am
Forum: Computer Chess Club: Tournaments and Matches
Topic: An Unexpected Rybka vs. Robbo result
Replies: 14
Views: 1804

Re: An Unexpected Rybka vs. Robbo result

I got different code from another source so probably it depends on which version we are talking about. Anyway in view of both your comments and this other code, I'm convinced now that the results are probably due to Robbo handling very short time limits differently than normal time limits, for whate...
by lkaufman
Tue Feb 09, 2010 3:45 am
Forum: Computer Chess Club: Tournaments and Matches
Topic: An Unexpected Rybka vs. Robbo result
Replies: 14
Views: 1804

Re: An Unexpected Rybka vs. Robbo result

I checked, and it turns out that our tester does not enforce time forfeits; it "trusts" that programs won't time forfeit. So this is not the problem. However I suppose the problem could be that Robbo simply doesn't handle small fractions of a second well for some reason. Since we are playing with in...
by lkaufman
Tue Feb 09, 2010 1:42 am
Forum: Computer Chess Club: Tournaments and Matches
Topic: An Unexpected Rybka vs. Robbo result
Replies: 14
Views: 1804

Re: An Unexpected Rybka vs. Robbo result

That's interesting, but I'm testing Robbolito, not Ivanhoe. Is there any reason to believe this would be happening to Robbolito?
by lkaufman
Mon Feb 08, 2010 11:54 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: An Unexpected Rybka vs. Robbo result
Replies: 14
Views: 1804

Re: An Unexpected Rybka vs. Robbo result

Time management is possible, but programs normally do everything proportionally, so the result should be similar to five minutes plus five seconds or one hour plus one minute in that respect.
by lkaufman
Mon Feb 08, 2010 11:44 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: An Unexpected Rybka vs. Robbo result
Replies: 14
Views: 1804

An Unexpected Rybka vs. Robbo result

We are currently running a private multi-round robin tournament involving three versions of Komodo, Stockfish, Rybka 3 and Robbolito, all on one core. The time limit is very fast, and Rybka and Robbo are set to half the time of the other programs to make them at least somewhat competitive. Roughly s...
by lkaufman
Mon Feb 08, 2010 7:43 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Firebird 1.0 and 1.01: 180 games.
Replies: 67
Views: 11948

Re: Firebird 1.0 and 1.01: 180 games.

We (meaning both while working on Rybka and now on Komodo) have generally found that improved eval works pretty well against any opponent, and speedups work against unrelated opponents but to a lesser extent. However when speed is achieved at the expense of knowledge, it is likely that the faster ve...
by lkaufman
Mon Feb 08, 2010 7:32 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Firebird 1.0 and 1.01: 180 games.
Replies: 67
Views: 11948

Re: Firebird 1.0 and 1.01: 180 games.

Robbo (and I presume also Firebird) is much faster than Rybka 3 but with lower quality, so it will often see a ply deeper but with less positional knowledge and missing some tactical things as well. Therefore in a given amount of time the move choice is likely to be different. Apparently in this par...