Search found 1136 matches

by chrisw
Sun Sep 27, 2020 8:35 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: First success with neural nets
Replies: 17
Views: 1024

Re: First success with neural nets

I've had another successful result with the rook & pawn endgame neural net. It was touch and go with a random regression, but finally got SlowDev scoring +4 elo versus Stockfish 11 in my rook endgame suite (so that's well outside the 95% error bars.) So I can say with a good degree of confidence th...
by chrisw
Sun Sep 27, 2020 5:44 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Slightly hairy Blitz game from nightmare.nl chess server
Replies: 10
Views: 362

Re: Slightly hairy Blitz game from nightmare.nl chess server

This one was embarrassing. rpiRofschade at only 0.8 Mnps (I assume NNUE version), and mine got tied up in knots. If anything is going to convince me NNUE, this is it. Just awful. Evaluation is King. [Event "ICS rated blitz match"] [Site "nightmare-chess.nl"] [Date "2020.09.27"] [Round "-"] [White "r...
by chrisw
Sun Sep 27, 2020 3:38 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Slightly hairy Blitz game from nightmare.nl chess server
Replies: 10
Views: 362

Re: Slightly hairy Blitz game from nightmare.nl chess server

A nice game indeed! I think that this hairy game was played with the regular rofChade version, but I'm not totally sure, because I had to fight some battles with xboard and directories etc. The version that is playing right now is the nnue version with the "latest" net from Sergio Vieri. On the Pi ...
by chrisw
Sun Sep 27, 2020 3:32 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Slightly hairy Blitz game from nightmare.nl chess server
Replies: 10
Views: 362

Re: Slightly hairy Blitz game from nightmare.nl chess server

22. Nd4xe6 !! 23. Ne4f6 !! I think that's a beautiful set of moves that resolves a very hairy position indeed. The black bishop/queen battery is very powerful, and the only reason white isn't mated is the knight on e4. f7f5 first looked like the death blow; either lose a piece, or be checkmated. Th...
by chrisw
Sun Sep 27, 2020 12:54 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Slightly hairy Blitz game from nightmare.nl chess server
Replies: 10
Views: 362

Re: Slightly hairy Blitz game from nightmare.nl chess server

Indeed a very nice game to watch, full of tactics. I stopped playing OTB chess 15 years ago, 5 min. blitz was always one of my favorites, there were days that I played more than 60 blitz games in a row. It was always fun to create unbalanced positions with a lot of tactics to make it as difficult a...
by chrisw
Sun Sep 27, 2020 7:52 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Excluding squares from mobility
Replies: 10
Views: 485

Re: Excluding squares from mobility

What I did (years ago) was "safe mobility" a trivial and obvious idea: - for knights and bishops, exclude squares attacked by opponent's pawns - for rooks, exclude squares attacked by opponent's pawns, knights and bishops - for queens, exclude squares attacked by opponent's pawns, knights, bishops ...
by chrisw
Sat Sep 26, 2020 5:14 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Slightly hairy Blitz game from nightmare.nl chess server
Replies: 10
Views: 362

Slightly hairy Blitz game from nightmare.nl chess server

Well, this was fun to watch, five minute blitz, sacs, material imbalance .... [Event "ICS rated blitz match"] [Site "nightmare-chess.nl"] [Date "2020.09.26"] [Round "-"] [White "CoronaVirusChess"] [Black "rpiRofChade"] [Result "*"] [WhiteElo "2705"] [BlackElo "2843"] [TimeControl "300+1"] [Annotator...
by chrisw
Fri Sep 25, 2020 2:33 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: How many Elo points is a book?
Replies: 11
Views: 731

Re: How many Elo points is a book?

Other factor 'for' book, is that theoretically 'engine with' gets better positions, which is +ve Elo. Most of the games I use for the book are played by top engines, I assume that the engine will get a better position with book. During tourneys it often happens that the engine plays a repetition dr...
by chrisw
Fri Sep 25, 2020 12:35 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: How many Elo points is a book?
Replies: 11
Views: 731

Re: How many Elo points is a book?

Up to now I've not been using a book (multi-game testing was always using cutechess and a big random book, same for both sides, to give variance). Since getting relatively trashed in the monthly Dutch blitz tournament, I hurriedly put a book together (semi-random move chooser, similar chooser metho...
by chrisw
Fri Sep 25, 2020 8:57 am
Forum: Computer Chess Club: General Topics
Topic: 41 million EPDs with evals for tuning purposes
Replies: 6
Views: 1206

Re: 41 million EPDs with evals for tuning purposes

Is there a "quiet" version of this collection? A 25ms stockfish search is probably depth=8 so there could be many tactical moves. This is probably good for training NNUE or shallow nets but I am trying to tune my hand-crafted eval with this. I can't get it to converge with this test set. I may have...