Search found 6528 matches

by Uri Blass
Sun Jul 28, 2019 4:59 pm
Forum: Computer Chess Club: General Topics
Topic: RSIF as alternative to armageddon
Replies: 70
Views: 6523

Re: RSIF as alternative to armageddon

I see from the game you posted how the repetition rule has huge effects thruout the endgame. So here is a simple alternative: 1. Three time repetition is illegal. 2. Stalemate is a loss for the stalemated side. (old rule) 3. Bare King loses. (old rule) 4. Fifty move rule is a win for Black. I had a...
by Uri Blass
Sat Jul 27, 2019 6:55 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: You gotta love Perft... just not too much!
Replies: 11
Views: 1910

Re: You gotta love Perft... just not too much!

calculate the sum of some million of perft(2) from a big pgn is not waiting forever and I believe it has good chances to cover all the cases. I doubt if a small set cover all the cases that you can think about. I disagree. you can always add a new corner case if you miss something, I never claimed ...
by Uri Blass
Sat Jul 27, 2019 1:15 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: You gotta love Perft... just not too much!
Replies: 11
Views: 1910

Re: You gotta love Perft... just not too much!

I believe in a small set of artificial positions that test all the gotchas with perft runs to very shallow depth. It will run in a couple of milliseconds and the results will be way more valuable than running zillions of positions and waiting forever. Especially useful when you need to re-test afte...
by Uri Blass
Sat Jul 27, 2019 8:51 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: You gotta love Perft... just not too much!
Replies: 11
Views: 1910

Re: You gotta love Perft... just not too much!

I suggest that you add perft pgn command to verify your move generator. The idea is that you take a big pgn and calculate the sum of perft(n) for all the positions in the pgn and find if the sum is correct(I am sure that part of the positions should have a promotion of a pawn in reply to check becau...
by Uri Blass
Sat Jul 27, 2019 7:46 am
Forum: Computer Chess Club: General Topics
Topic: refuted opening lines
Replies: 6
Views: 1153

refuted opening lines

It may be interesting how many common opening lines are refuted by ananlysis of chess engines For this discussion refuted means evaluation of more than 1.5 pawns for one side after long analysis by stockfish with contempt 0(more than 3,000,000,000 nodes) so probably losing the game common means that...
by Uri Blass
Fri Jul 26, 2019 3:49 am
Forum: Computer Chess Club: General Topics
Topic: What's up with this endgame?
Replies: 56
Views: 3335

Re: What's up with this endgame?

I do not think that it is possible to predict engine's moves to plan a win in advance because they are not deterministic and change their mind.
I doubt if you can beat stockfish at 1 hour per move with no book most of the times.
by Uri Blass
Thu Jul 25, 2019 1:14 am
Forum: Computer Chess Club: General Topics
Topic: future of top engines:how much more elo?
Replies: 124
Views: 10574

Re: future of top engines:how much more elo?

They are separate rating lists, meaning you can't compare those two ratings. Unless you were joking, of course. :| The idea is that people want rating to measure playing strength when the idea is that rating at short time control should be lower than rating at long time control because the level of...
by Uri Blass
Wed Jul 24, 2019 9:28 am
Forum: Computer Chess Club: General Topics
Topic: future of top engines:how much more elo?
Replies: 124
Views: 10574

Re: future of top engines:how much more elo?

But that doesn't matter, the algorithm just needs to use an strategy that allows it to have the worst performance against the pool of opponents, and we make it be calibrated to 0 elo. Ideally, the rating lists would include these algorithms in their pools (so far rating lists have been incredibly b...
by Uri Blass
Wed Jul 24, 2019 7:50 am
Forum: Computer Chess Club: General Topics
Topic: future of top engines:how much more elo?
Replies: 124
Views: 10574

Re: future of top engines:how much more elo?

I think even "Andworst" - the worst Andscacs --- is weaker than Worstfish, IIRC it is 400+ Elo points below Random. Ah, but the thing here is that it's not just against Random, here the ELO is calculated against the entire pool of opponents (including Stockfish 1000000 nodes, and lots of entities t...
by Uri Blass
Wed Jul 24, 2019 2:16 am
Forum: Computer Chess Club: General Topics
Topic: future of top engines:how much more elo?
Replies: 124
Views: 10574

Re: future of top engines:how much more elo?

after the latest stf6 komodo 8 etc, i wonder how much elo more can be achieve via programming,on the same hardware of course. 100,200,300 elo more? it could be a poll but anyway just a "food of thought" my personal feeling not more than 100 elo. more? it would be a miracle dont forget pls on the sa...