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by lkaufman
Wed Feb 10, 2010 4:00 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Firebird 1.0 and 1.01: 180 games.
Replies: 67
Views: 12021

Re: Firebird 1.0 and 1.01: 180 games.

I'm not sure what the percentages you mention refer to. My result was that Rybka 3 matched 58.7% of nearly 10,000 moves while Robbo 9 matched 58.15% at one minute. So Rybka 3 did better, but I called it equal as the difference of about half a percentage point is not highly significant for the sample...
by lkaufman
Tue Feb 09, 2010 10:27 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Firebird 1.0 and 1.01: 180 games.
Replies: 67
Views: 12021

Re: Firebird 1.0 and 1.01: 180 games.

no, I mean that they are equal at one minute per move based on matching thousands of games, not based on two games.
by lkaufman
Tue Feb 09, 2010 8:14 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Firebird 1.0 and 1.01: 180 games.
Replies: 67
Views: 12021

Re: Firebird 1.0 and 1.01: 180 games.

I don't claim that the two programs are the same or even nearly the same, because the derivatives have a simpler but faster evaluation which in timed play will often lead to a different move. These differences favored Firebird in the two games you mention, but based on literally thousands of such co...
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: 12021

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: 12021

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: 1844

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: 1844

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: 1844

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: 1844

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: 1844

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.