Search found 3571 matches

by lkaufman
Tue Jun 29, 2010 2:48 am
Forum: Computer Chess Club: Tournaments and Matches
Topic: Question to the members of the ranking lists..
Replies: 77
Views: 6527

Re: Question to the members of the ranking lists..

As I see it your data supports my claim, though not dramatically. The spread of ratings is 1298 in the fast games and 1258 in the slow ones, which suggests that slow games favor weaker programs. Moreover nearly all of your bottom ten programs are listed as better at slow chess. The effect is much st...
by lkaufman
Tue Jun 29, 2010 1:04 am
Forum: Computer Chess Club: Tournaments and Matches
Topic: Question to the members of the ranking lists..
Replies: 77
Views: 6527

Re: Question to the members of the ranking lists..

"Hi GM Kaufman excuse me if i digress firstly its good to see you well again and back posting on the forums perhaps you will remember me? i helped sponsor the GM Joel Benjamin v Rybka "White Odds" match a few years ago" Yes, I remember well. If you ever have any desire to sponsor any other computer...
by lkaufman
Tue Jun 29, 2010 12:49 am
Forum: Computer Chess Club: Tournaments and Matches
Topic: Question to the members of the ranking lists..
Replies: 77
Views: 6527

Re: Question to the members of the ranking lists..

"A program could be superior due to evaluation or search or both. I think the effects of greater time will be different depending on whether the superiority is due to search or eval." This is of course true, but in general stronger programs are stronger in both search and eval, so a comparison of t...
by lkaufman
Mon Jun 28, 2010 10:18 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Question to the members of the ranking lists..
Replies: 77
Views: 6527

Re: Question to the members of the ranking lists..

It has been theorized that pondering favors the stronger program, as if it sees things faster it is more likely to predict the opponent's move. If someone wants to go to the trouble, this theory can be checked by comparing the standard deviation of the ratings of engines on the IPON list with the sa...
by lkaufman
Mon Jun 28, 2010 9:05 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Question to the members of the ranking lists..
Replies: 77
Views: 6527

Re: Question to the members of the ranking lists..

In the past century, there were plenty of games between FIDE rated players and SSDF rated engines, enough to derive a formula of how to predict the FIDE rating of an engine given the SSDF rating. No one did this precisely, but my 75% formula is a good approximation. Presumably, CCRL (or CEGT) slow r...
by lkaufman
Mon Jun 28, 2010 8:44 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Question to the members of the ranking lists..
Replies: 77
Views: 6527

Re: Question to the members of the ranking lists..

Regardless of the wording issue, the real question is whether one can use engine-engine rating lists to predict (with reasonable margin of error) the ratings engines would have against top humans in competition. I say "yes, if the calculation is done correctly, but not just by looking at the raw num...
by lkaufman
Mon Jun 28, 2010 7:11 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Question to the members of the ranking lists..
Replies: 77
Views: 6527

Re: Question to the members of the ranking lists..

Hello Rainer One of the key sentences on my site is: The Elo numbers shown here do not correlate to human ratings Bye Ingo I must disagree with this. All the evidence suggests that engine vs engine ratings do correlate very well with human ratings; it's just that the correlation involves multiplyin...
by lkaufman
Fri Jun 25, 2010 3:15 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Question to the members of the ranking lists..
Replies: 77
Views: 6527

Re: Question to the members of the ranking lists..

Hello Rainer "Nevertheless Frank and I chosed to have an identical starting point. The 2800 for Shredder were an easy solution because we both had the 32bit Version wih quite a lot of games in our lists and we did not want to have a single engine (at that time) with 3000 Elo in our lists as this se...
by lkaufman
Fri May 21, 2010 10:13 pm
Forum: Computer Chess Club: General Topics
Topic: stockfish improvement
Replies: 7
Views: 2943

Re: stockfish improvement

Sure, we like to try all new ideas from credible sources. The majority don't work for us, but some do. In general it seems we often independently think of the same basic ideas as your team does around the same time, although of course the details vary greatly. Right now the big mystery for us is why...
by lkaufman
Fri May 21, 2010 2:39 am
Forum: Computer Chess Club: General Topics
Topic: stockfish improvement
Replies: 7
Views: 2943

Re: stockfish improvement

I think this is right. In my opinion the older Stockfish was just too conservative in matters like LMR, and 1.71 corrected this. Komodo was already reasonably aggressive in these matters, so we could not benefit much by the new ideas in 1.71, some of which we were already using.