Search found 2040 matches

by Michel
Sat Dec 07, 2019 7:09 am
Forum: Computer Chess Club: General Topics
Topic: stockfish 10 vs. Mephisto III S Glasgow
Replies: 90
Views: 6457

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: 3759

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: 3759

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: 3759

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.
by Michel
Thu Nov 14, 2019 1:51 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish search stops here after 99 plies, why?
Replies: 10
Views: 1042

Re: Stockfish search stops here after 99 plies, why?

8/4k3/8/1p1p1p1p/pPpPpPpP/P1P1P1P1/8/6BK w - - 0 1 after 99 plies no more output in next hour even if CPU usage is still 100% :!: analysis by Stockfish 121119 64 BMI2: ... 1.Bf2 Ke6 2.Kg1 Kd6 3.Be1 Ke6 4.Kf2 Ke7 5.Kf1 Kf6 6.Ke2 Ke6 7.Bd2 Kd7 8.Kf2 Ke6 9.Kf1 Ke7 10.Kg2 Kf6 11.Kh2 Ke7 12.Kh1 Ke6 13.B...
by Michel
Fri Nov 08, 2019 4:45 am
Forum: Computer Chess Club: General Topics
Topic: Stockfish with and without contempt
Replies: 36
Views: 2389

Re: Stockfish with and without contempt

based on what I see, I no reason not to use SF contempt scoring in analysis, but I understand people have their own reasons and that's fine, it is certainly not my way or the highway ;>) - also , note - that SF contempt code is symmetrical ... Are you sure, Mike? To me it looks like Contempt breaks...
by Michel
Thu Nov 07, 2019 7:28 pm
Forum: Computer Chess Club: General Topics
Topic: Fritz 17
Replies: 264
Views: 23482

Re: Fritz 17

No, it is just data. It is literally just a monster text file with a string of 27.9 million numbers each separated by a space. You cannot run it, just consult it. This is highly debatable. A compiled program is also just data which is interpreted by another program (the CPU hardware, developed itse...
by Michel
Thu Nov 07, 2019 4:02 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish with and without contempt
Replies: 36
Views: 2389

Re: Stockfish with and without contempt

based on what I see, I no reason not to use SF contempt scoring in analysis, but I understand people have their own reasons and that's fine, it is certainly not my way or the highway ;>) - also , note - that SF contempt code is symmetrical ... Are you sure, Mike? To me it looks like Contempt breaks...
by Michel
Wed Nov 06, 2019 7:27 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish with and without contempt
Replies: 36
Views: 2389

Re: Stockfish with and without contempt

That is my opinion - and the way contempt is implemented in SF - it is color neutral , meaning the evaluations are totally symmetrical - so there is no reason to have the off black white and on settings. They are there because it was requested by the user community - but by and large most of the de...
by Michel
Wed Nov 06, 2019 10:25 am
Forum: Computer Chess Club: General Topics
Topic: Stockfish with and without contempt
Replies: 36
Views: 2389

Re: Stockfish with and without contempt

If you think of the static eval as an indication of the expected score against an equal opponent then it is logical to add some adjustment if the opponent is not of the same strength. This adjustment should only be made for non-hard scores (e.g. not for DRAWSCORE). This is the philosophy behind SF's...