Search found 2046 matches

by Michel
Fri Dec 13, 2019 4:50 am
Forum: Computer Chess Club: General Topics
Topic: Stockfish 10 was released 29.11.2018
Replies: 36
Views: 2463

Re: Stockfish 10 was released 29.11.2018

I redid the analysis for June 1 to Dec 1. Now the sum is -24.59. There were 36 simplifications in 23 blocks. Assuming 3.80 as error bars (the actual error bars vary a bit from test to test) we find total error bars of sqrt(2*23)*3.80=25.77. So 24.59 is still not significant, despite the fact that Ju...
by Michel
Thu Dec 12, 2019 8:44 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish 10 was released 29.11.2018
Replies: 36
Views: 2463

Re: Stockfish 10 was released 29.11.2018.

Hello: I did a spreadsheet for all simplifications on that site. I then set June 1st ELO to zero. I then summed the ELO gain ( or loss) for all simplification from June First to December First. The net ELO loss was 24.54 ELO over a six month period. IMHO this is too much ELO loss. Six months is too...
by Michel
Thu Dec 12, 2019 7:49 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish 10 was released 29.11.2018
Replies: 36
Views: 2463

Re: Stockfish 10 was released 29.11.2018

I did a spreadsheet for all simplifications on that site. I then set June 1st ELO to zero. I then summed the ELO gain ( or loss) for all simplification from June First to December First. The net ELO loss was 24.54 ELO over a six month period. IMHO this is too much ELO loss. Six months is too much t...
by Michel
Thu Dec 12, 2019 1:57 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish 10 was released 29.11.2018
Replies: 36
Views: 2463

Re: Stockfish 10 was released 29.11.2018

There are not enough games to know if a simplification is a regression or an improvement but you can get an unbiased estimate for the average value of simplifications from stockfish10. These are the first numbers and you need to get more numbers from the link and calculate average for that purpose....
by Michel
Wed Dec 11, 2019 11:23 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish 10 was released 29.11.2018
Replies: 36
Views: 2463

Re: Stockfish 10 was released 29.11.2018

I think that one of the problem with testing in the stockfish framework is that you adjudicate games as a draw when the evaluation is 0.00 for some moves and there is no progress and do not continue until you see a draw by the 50 move rule. It means that even if some patch make an improvement then ...
by Michel
Sat Dec 07, 2019 9:55 pm
Forum: Computer Chess Club: General Topics
Topic: stockfish 10 vs. Mephisto III S Glasgow
Replies: 116
Views: 7361

Re: stockfish 10 vs. Mephisto III S Glasgow

I have no idea what you talk about. I sum up: Mephisto III S Glasgow 68000 (5-10 NPS) wins against stockfish 10. Even worse Mephisto III 8 bit 1802 1-3 NPS with 6.1 MHz wins against stockfish 10. Mephisto III 8 bit 1802 1 NPS 3.5 MHz on 4 AA batteries wins against stockfish 10 too. Ic0 plays better...
by Michel
Sat Dec 07, 2019 7:09 am
Forum: Computer Chess Club: General Topics
Topic: stockfish 10 vs. Mephisto III S Glasgow
Replies: 116
Views: 7361

Re: stockfish 10 vs. Mephisto III S Glasgow

Black is worse but not clearly losing before 16...Nc5 so I analyzed the reason that stockfish did not play 16...cxd5 and the problem is that after 17.Nxd5 stockfish prune all the queen moves so it does not see that the queen can escape and believe that 17.Nxd5 wins the queen(only at depth 6 it can ...
by Michel
Mon Nov 18, 2019 11:10 am
Forum: Computer Chess Club: General Topics
Topic: What is the purpose of chess engines?
Replies: 88
Views: 3847

Re: What is the purpose of chess engines?

It is interesting to observe though that if we are interested in obtaining a probabilistic estimate for the game theoretic value of a position, minimax may not be the best algorithm. If we consider a tree with independent leaf nodes (a very unrealistic assumption I admit) and we think of the static ...
by Michel
Mon Nov 18, 2019 10:26 am
Forum: Computer Chess Club: General Topics
Topic: What is the purpose of chess engines?
Replies: 88
Views: 3847

Re: What is the purpose of chess engines?

The chess truth requires playing a game, lest you can wrongly conclude that a position is a draw, or that it is won, but you'll never know because "best play" is that, playing moves, and chess is about that, not about analysis which can go on FOREVER because there's a different move in a previous p...
by Michel
Sun Nov 17, 2019 9:40 pm
Forum: Computer Chess Club: General Topics
Topic: What is the purpose of chess engines?
Replies: 88
Views: 3847

Re: What is the purpose of chess engines?

For me truth in chess is the game theoretic value of a position. Sadly chess engines cannot give this rigorously. Not even in a probabilistic sense.