Search found 2254 matches

by Milos
Wed Dec 30, 2009 9:06 pm
Forum: Computer Chess Club: General Topics
Topic: Smooth scaling stockfish
Replies: 67
Views: 16961

Re: Little test with both stockfish 1.6s versions!

Delta is a huge value in Tord's program because it is in centipawns. I do not know that log base is is the right squeezer. I suggested cube root in my original post as an alternative. This factor also is a rich area for possible experimentation. I guess that when a final formula is found, it will b...
by Milos
Wed Dec 30, 2009 8:17 pm
Forum: Computer Chess Club: General Topics
Topic: Smooth scaling stockfish
Replies: 67
Views: 16961

Re: Little test with both stockfish 1.6s versions!

I suspect that it is too much. It also may be a good idea to adjust the constants. I actually just eyeballed the equation constants from a curve I drew by hand an calculated by inverting a small matrix. I guess that great improvement can be had by adjusting the formula in a rational and scientific ...
by Milos
Wed Dec 30, 2009 2:39 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Smooth scaling stockfish
Replies: 98
Views: 23617

Re: Smooth scaling stockfish

I want to congratulate to Dann. It's not 150elo of course, but the idea is brilliant. Just implemented it in Robbo, and it looks like 5% additionally.
Great job!
by Milos
Thu Dec 24, 2009 8:08 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish 1.6
Replies: 73
Views: 41174

Re: Stockfish 1.6

Why would anyone need to go to all that trouble? How hard would it be to take Rybka 2.2, for example, and have it identify itself as Rybka 3? You think ppl are that stupid that cannot see the difference between 7.5MB and 2.5MB file??? Or you think they cannot see the the difference in output? Oh, I...
by Milos
Thu Dec 24, 2009 8:01 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish 1.6
Replies: 73
Views: 41174

Re: Stockfish 1.6

Rybka's +45 Elo perf is in line with one extra core, so so far Robbo is performing exactly as Rybka 3 would with one core. And your error bar is, hm, only 60 Elo. Seams your conclusion is very reliable. On the other hand just to inform you, because you kind of pretend not to know. Going from 1 core...
by Milos
Thu Dec 24, 2009 6:03 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish 1.6
Replies: 73
Views: 41174

Re: Stockfish 1.6

Anybody who downloaded a pirated copy of Rybka 3 (and I'm not suggesting that anybody in this thread did) should realise that fake copies were deliberately put on the net. This could well explain some of the poor results posted around the forums. If anybody with a fake Rybka 3 tries out the same po...
by Milos
Wed Dec 23, 2009 10:45 am
Forum: Computer Chess Club: General Topics
Topic: Probability to have repeated games
Replies: 27
Views: 2640

Re: Probability to have repeated games

This is not the question you asked, but I have a 1980s Tandy/Radio Shack chess computer with a small opening book. Once out of the opening, at a given time control, it always plays the same move in the same position - and I tended to do that as well, so to my annoyance I used to find myself playing...
by Milos
Wed Dec 23, 2009 12:20 am
Forum: Computer Chess Club: General Topics
Topic: Probability to have repeated games
Replies: 27
Views: 2640

Re: Probability to have repeated games

Results: White Wins : 299 (29.9 %) Black Wins : 393 (39.3 %) Draws : 308 (30.8 %) Final Outcome: No game is repeated . Thanks for the result. It is kind of expected :). One more firm conclusion can be made. This position is more beneficial for black. ;) I usually test engines with 80 opening positi...
by Milos
Mon Dec 21, 2009 1:34 pm
Forum: Computer Chess Club: General Topics
Topic: Probability to have repeated games
Replies: 27
Views: 2640

Re: Probability to have repeated games

The constraint will probably be a book made with a single game--so there is only one predefined position for the 1000 games. Now the question is up to how many moves before exiting the book. It would seem the higher the number of book moves the more likely there is a chance of getting repeat games-...
by Milos
Mon Dec 21, 2009 11:30 am
Forum: Computer Chess Club: Tournaments and Matches
Topic: Test tournament: RobboLito 0.08e4
Replies: 17
Views: 1762

Re: Test tournament: RobboLito 0.08e4

R3 has a linear score against Robbolito with higher time controls or of course with bigger hardware. It is basically R3 with a large part of R3's evaluation still not in. This makes the engine executable very fast and thus it will perform very well against R3 at fast time controls but will lose tha...