Search found 4641 matches

by Ferdy
Sun Jul 25, 2021 3:05 am
Forum: Computer Chess Club: General Topics
Topic: Rating Comparisons
Replies: 1
Views: 414

Re: Rating Comparisons

I came across this interesting post from March of this year. https://chessgoals.com/rating-comparison/ One of the most common questions in the chess world is how your rating compares to other measurements. For example: how does your rating on Chess.com compare with your rating on lichess.org? Other...
by Ferdy
Sun Jul 25, 2021 2:53 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Just an untested idea
Replies: 10
Views: 2131

Re: Just an untested idea

It's popular to tune your PST's with Texel tuning, I like to offer an alternative, tune existing PST's with the values of your history table after the search is finished. The idea is based on an experiment that at the time gave me 10-15 elo. Results after 20,000 opening positions after a 10 ply sea...
by Ferdy
Sun Jul 25, 2021 2:20 am
Forum: Computer Chess Club: General Topics
Topic: Which Stockfish version to get good evaluations for database
Replies: 7
Views: 230

Re: Which Stockfish version to get good evaluations for database

Hello, I'm looking for a way to quickly evaluate each move for my large database. I have the code ready but I am not sure which engine/version to use for that. The idea would be to have a strong engine evaluation (Elo 3000+) in the fastest way possible. First I thought about Stockfish 14 at depth 1...
by Ferdy
Fri Jul 23, 2021 2:47 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Any Testsuites in EPD format you can recommend?
Replies: 6
Views: 593

Re: Any Testsuites in EPD format you can recommend?

I have used the ECM.epd to test different versions of my engine at a fixed depth. I measure how many nodes were visited, how fast the test terminated and of course how many positions my engine solved. I ran a test today of a promising new version which was considerably faster but it solved 5 less p...
by Ferdy
Thu Jul 15, 2021 3:36 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Calculation the playing strength of a move
Replies: 51
Views: 5517

Re: Calculation the playing strength of a move

Rating calculation comparison. case 1: All players are assigned an initial rating of 2800. The rating reference is fixed at 2800, example calculation is: 1. player move is Nf3, engine move is Nf3, elo loss is 0, perf rating is 2800 2. player move is Be2, engine move is Qb3, elo loss is 50, perf rati...
by Ferdy
Thu Jul 15, 2021 3:09 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Calculation the playing strength of a move
Replies: 51
Views: 5517

Re: Calculation the playing strength of a move

That 3000 is only an example, it does not apply to players of around 1500 :) . The reference engine rating has to be determined wisely depending on the players rating. Here is what I had experimented before. Player ratings as seen by the engine at fixed depth 16. The rating is based on moves's eval...
by Ferdy
Thu Jul 15, 2021 2:50 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Calculation the playing strength of a move
Replies: 51
Views: 5517

Re: Calculation the playing strength of a move

Isn't that the same as saying that the Elo you have to assign to the move has to be determined from the rating of the player playing it, in an indirect way? In the experiment, initially we don't know the rating of players. We will only know its strength depending on the opponents moves (good or bad...
by Ferdy
Wed Jul 14, 2021 1:43 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Calculation the playing strength of a move
Replies: 51
Views: 5517

Re: Calculation the playing strength of a move

That 3000 is only an example, it does not apply to players of around 1500 :) . The reference engine rating has to be determined wisely depending on the players rating. Here is what I had experimented before. Player ratings as seen by the engine at fixed depth 16. The rating is based on moves's evalu...
by Ferdy
Wed Jul 14, 2021 10:54 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Calculation the playing strength of a move
Replies: 51
Views: 5517

Re: Calculation the playing strength of a move

If the initial rating of your opponent is say 2000, your perf rating will be 2000 - 32.57 or 1967.43. However if you find the 0.2 your perf rating will be 2000 + 8.69 or 2008.69. Ferdy, I have a slightly different perspective on this last part. Let us assume that the engine is rated 3000. If you fi...
by Ferdy
Tue Jul 13, 2021 2:16 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Calculation the playing strength of a move
Replies: 51
Views: 5517

Re: Calculation the playing strength of a move

If the initial rating of your opponent is say 2000, your perf rating will be 2000 - 32.57 or 1967.43. However if you find the 0.2 your perf rating will be 2000 + 8.69 or 2008.69. Ferdy, I have a slightly different perspective on this last part. Let us assume that the engine is rated 3000. If you fi...