## Search found 812 matches

Tue Jan 21, 2020 11:47 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Board adaptive / tuning evaluation function - no NN/AI
Replies: 14
Views: 646

### Re: Board adaptive / tuning evaluation function - no NN/AI

Rodent IV adapts to position in a sense: it uses two competing piece/square table scores. If they are equal, they are weighted 50/50. If one is better, ratio between their weights is pulled towards 25/75 (function of square root of difference between the scores, capped at 25).
Sun Jan 05, 2020 4:21 pm
Forum: Computer Chess Club: General Topics
Topic: Calculating an engines elo rating?
Replies: 8
Views: 460

### Re: Calculating an engines elo rating?

Depend on hardware and time control. Depends on time control and opponent's approach to weakening. Weak levels of Rodent run at low nodes per second, therefore should be the same across wide range of hardware (as long as you don't run it on a washing machine). But if other engine approximates elo b...
Thu Dec 19, 2019 3:58 pm
Forum: Computer Chess Club: General Topics
Topic: Evaluation challenge
Replies: 26
Views: 1285

### Re: Evaluation challenge

Moron 0.9 played 1.Qf2. Glad it has been fixed.
Tue Dec 17, 2019 10:48 am
Forum: Computer Chess Club: General Topics
Topic: If there were one engine I could bring back and covert
Replies: 40
Views: 2166

### Re: If there were one engine I could bring back and covert

Psion Chess by Richard Lang (https://www.retrogames.cz/play_430-DOS.php) I played a lot of games against it as a boy, and over the course of one summer holiday proceeded from losing at level one to winning at next-to-last level. I remember the engine as very stable, level-headed opponent. Also, it d...
Mon Dec 16, 2019 11:37 am
Forum: Computer Chess Club: General Topics
Topic: Evaluation challenge
Replies: 26
Views: 1285

### Re: Evaluation challenge

My private, unfinished engine, slightly weaker than Rodent and therefore unlikely to be released anytime soon, gets it at depth 6 and sticks to it. Reaching non-negative score requires depth 23. FEN: 1r2r1k1/p4ppp/3b1q2/1p1P3P/2p2P2/3nPB2/PP4Q1/1KBR3R w - - 0 1 Meander: 1 00:00 58 0 -2.45 Kb1-a1 Nd3...
Sun Dec 15, 2019 10:48 pm
Forum: Computer Chess Club: General Topics
Topic: In No castling Chess what Engine would be the King or the best?
Replies: 48
Views: 2760

### Re: In No castling Chess what Engine would be the King or the best?

I have always wondered why chess players for the most part, is so reluctant and hesitant when it comes to variants and more complex forms of chess. I can reply for myself. Chess has its lore, its tradition, learning materials, famous games to behold. It has also a kind of balance shaped over the ce...
Sat Dec 14, 2019 10:37 am
Forum: Chess Players Forum
Topic: Kramnik Idea to abolish draws should be used in Championship...
Replies: 7
Views: 591

### Re: Kramnik Idea to abolish draws should be used in Championship...

I've got a different idea. Since players seem to accept and embrace armageddon in its current form, and even base their match strategies on its existence, then armageddon should be made maximally unpleaseant. Rapid and blitz is oh, huh? Then decide playoffs with games using doubled, then quadrupled ...
Mon Dec 09, 2019 9:38 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: CMH question
Replies: 11
Views: 786

### Re: CMH question

One good way of telling about CMH is what Lucas said: it is basically local history table. The other way goes as follows: first you notice that certain moves tend to be refuted by the exact same move, so you create a table indexed by coordinates of a refuted move, save the refutation there and upon ...
Sat Dec 07, 2019 7:09 pm
Forum: Computer Chess Club: General Topics
Topic: stockfish 10 vs. Mephisto III S Glasgow
Replies: 116
Views: 8695

### Re: stockfish 10 vs. Mephisto III S Glasgow

If human matches were organised the way you organise Stockfish-Mephisto matches, one opponent would have an incompatibile liver transplant, and the other an axe in his head.
Thu Dec 05, 2019 9:44 pm
Forum: Computer Chess Club: General Topics
Topic: stockfish 10 vs. Mephisto III S Glasgow
Replies: 116
Views: 8695

### Re: stockfish 10 vs. Mephisto III S Glasgow

many programmers often speak out : why should I put knowledge into my programs when throwing knowledge out gives more ELO Encoding human knowledge in the engine is the polar opposite of imbuing engine with chess knowledge. Throughout the years, I developed a way of parametrising engine to play like...