Search found 490 matches

by Robert Pope
Fri Jul 31, 2020 10:56 pm
Forum: Computer Chess Club: General Topics
Topic: games with material balance
Replies: 6
Views: 488

Re: games with material balance

This is so much cleaner than what I had been trying to do - Thank you! Following up on this, I ended up adding code to Abbess to pull the selection of pgn files I wanted - pgn games truncated to where a certain number of pieces are left. However, I actually only want games that are still in progress...
by Robert Pope
Thu Jul 30, 2020 3:39 am
Forum: Computer Chess Club: General Topics
Topic: games with material balance
Replies: 6
Views: 488

Re: games with material balance

Following up on this, I ended up adding code to Abbess to pull the selection of pgn files I wanted - pgn games truncated to where a certain number of pieces are left. However, I actually only want games that are still in progress, i.e. no games ending in checkmate or draw. pgn-extract has --checkmat...
by Robert Pope
Tue Jul 07, 2020 12:14 am
Forum: Computer Chess Club: General Topics
Topic: games with material balance
Replies: 6
Views: 488

games with material balance

I'm trying to filter pgn files for certain endings, except I want the PGN to be truncated once that ending is reached (e.g. KQRKB). pgn-extract -z mat_kqrkb.txt -D -o kqrkb.pgn 1.pgn 2.pgn 3.pgn will find the KQRKB games, but it gives the full pgn of the game, rather than stopping once KQRKB is reac...
by Robert Pope
Sun Jul 05, 2020 11:26 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Throwing out draws to calculate Elo
Replies: 214
Views: 4681

Re: Throwing out draws to calculate Elo

Elo figures are already correctly reported with +/- Elo error bounds. There is no need to ask the Stockfish developers to truncate anything. However, if they are using LOS in fishtest, they should be warned that they are tuning Stockfish with a uniform PRNG (given enough games) It's only a uniform ...
by Robert Pope
Mon Jun 15, 2020 1:58 am
Forum: Computer Chess Club: General Topics
Topic: FEN to PGN
Replies: 1
Views: 239

FEN to PGN

Is there a program out there that will take a FEN position and attempt to generate a legal game that reaches that position?
by Robert Pope
Tue Jun 09, 2020 1:50 am
Forum: Computer Chess Club: General Topics
Topic: Leela and the curse of not finishing a won match cleanly.
Replies: 11
Views: 1495

Re: Leela and the curse of not finishing a won match cleanly.

What about
3. By playing an extra 100 pointless moves, it will occasionally wander into positions where an AB searcher can find a drawing continuation, turning a won game into a draw.
by Robert Pope
Sat Apr 25, 2020 1:19 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Null move
Replies: 5
Views: 1255

Re: Null move

Thanks for the explanation. I don't think I ever had eval as one of the criteria, and that appears to add 30 elo in my initial tests.
by Robert Pope
Fri Apr 24, 2020 8:09 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Null move
Replies: 5
Views: 1255

Null move

So, I've always struggled to get a null move search that gives me positive results. I decided to look at the rules that Stockfish uses and see the following: // Step 9. Null move search with verification search (~40 Elo) 1 if ( !PvNode 2 && (ss-1)->currentMove != MOVE_NULL 3 && (ss-1)->statScore < 2...
by Robert Pope
Thu Mar 26, 2020 1:01 am
Forum: Computer Chess Club: General Topics
Topic: Stockfish Polyglot now violates the GPL
Replies: 23
Views: 3393

Re: Stockfish Polyglot now violates the GPL

The only way they have of communication requires giving them my email and I don't even know if they'd sell it or whatever. It isn't rocket science to share the source (they chose to NOT include it with the compiles and to NOT update their github), so it's clear they preferred to have a closed Stock...
by Robert Pope
Wed Mar 25, 2020 1:38 am
Forum: Computer Chess Club: General Topics
Topic: Stockfish Polyglot now violates the GPL
Replies: 23
Views: 3393

Re: Stockfish Polyglot now violates the GPL

Did you ask for the source and were refused? GPL doesn't require source to be published on the web, just provided on request.