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by lkaufman
Sat Jun 18, 2011 10:29 pm
Forum: Computer Chess Club: General Topics
Topic: Observations about Komodo 2.03
Replies: 16
Views: 3447

Re: Observations about Komodo 2.03

I think that you are just observing that Komodo, like all the top rated programs, does a lot of forward pruning, which especially means discarding or reducing sacrifices (or failures to win material) that don't look very promising. You should test other top engines like Stockfish, Rybka, Critter, an...
by lkaufman
Sat Jun 18, 2011 2:37 pm
Forum: Computer Chess Club: General Topics
Topic: Programmers: what's the story behind the name of your engine
Replies: 32
Views: 7649

Re: Programmers: what's the story behind the name of your en

In our case it was an easy choice. I have for a long time used "Komodo" as a handle on various servers. It started with shogi, where the strongest piece (a promoted rook) is called a "dragon". So I used Komodo on shogi servers because the Komodo "dragon" is the only animal that bears the name "drago...
by lkaufman
Sat Jun 18, 2011 2:42 am
Forum: Computer Chess Club: General Topics
Topic: Question for the Komodo Team
Replies: 6
Views: 2039

Re: Question for the Komodo Team

To be a little blunt, is the plan for Komodo to go commercial with an SMP version? So anyways, Don or Larry care to comment and maybe shed a little light on your plans? I'm certainly interested on where this is headed." We have said all along that we want to keep the single-core version free, but w...
by lkaufman
Fri Jun 17, 2011 11:08 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Komodo 2.03 running for the IPON
Replies: 7
Views: 1702

Re: Komodo 2.03 running for the IPON

[quote="mcostalba"[I would like to congratulate with Komodo's team, really an impressive result! I am sure this year someone will finally overcome R4 ! I mean, starting from below, I don't count who already started from above ;-)[/quote] Thanks. Since we're already tied with R4 on IPON (and one poin...
by lkaufman
Thu Jun 16, 2011 1:21 am
Forum: Computer Chess Club: General Topics
Topic: Komodo 2.03 release is imminent
Replies: 84
Views: 20165

Re: Komodo 2.03 release is imminent

Hi Don, Komodo / Doch versions are in SWCR the most passiv engines in the group of stronger engines. More as 10.000 40-minutes games played with your versions and the statistics are allways the same. Easy to see because in SWCR I play without resign mode up to mate. Your engine made the most points...
by lkaufman
Wed Jun 15, 2011 10:25 pm
Forum: Computer Chess Club: General Topics
Topic: Komodo 2.03 release is imminent
Replies: 84
Views: 20165

Re: Komodo 2.03 release is imminent

Don is correct that the true time loss is less that 20%. However at the speeds you are testing I think that 20% is probably close to 40 elo. We have the same problem as you in our testing, namely the tradeoff between systematic error and sample-size error. In my opinion the way you test is ok if you...
by lkaufman
Wed Jun 15, 2011 8:07 pm
Forum: Computer Chess Club: General Topics
Topic: Komodo 2.03 release is imminent
Replies: 84
Views: 20165

Re: Komodo 2.03 release is imminent

You are basically testing 0.1 sec/move, so the overhead default is 20% of the time, which is huge at such fast levels. I think you will see a large increase if you cut the 20 to 1 millisecond, assuming that this does not trigger time forfeits in your GUI. Talking more generally, your testing level i...
by lkaufman
Fri Jun 10, 2011 6:43 am
Forum: Computer Chess Club: General Topics
Topic: Komodo 2.01 is out!
Replies: 77
Views: 25075

Re: Komodo 2.01 is out!

So far I've played 157 bullet (1') games against Rybka 3 (1 cpu) on my non-sse4 64 bit laptop using the Fritz interface and so far no problems, Komodo is four games ahead. I'm away from home so I can't test the sse4 version myself now.
by lkaufman
Thu Jun 02, 2011 2:41 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: testing question
Replies: 26
Views: 3828

Re: testing question

[quote="bob"I am not sure how testing A against A' requires fewer games than when testing A vs B, C, D, E and F. I've not seen where the opponents matter, just the total number of games. In fact, the opposite might be the case, because when testing A vs A', the difference is typically very small, wh...
by lkaufman
Thu Jun 02, 2011 3:09 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: testing question
Replies: 26
Views: 3828

Re: testing question

Yes, gains against foreign programs are almost always less than predicted by self-testing. Furthermore we already do what you say, a mix of the two types of testing. So I guess what I really want to know is which of the two types of testing should we do mostly? It is unlikely that exactly a 50-50 di...