TalkChess.com

This is an excellent Windows tool for polyglot books

https://chess.massimilianogoi.com/downl ... ttolerant/

Interesting project. I gave it a try and I came up with my version of the tool. It is pretty fast considering it is written in Java. I estimate it flips "epd" records at about 10,000 records per second on a typical home PC using I5. No opcodes or blank lines in output. Outputs are "epd" files. Consi...

Stockfish developmental progress is tested at https://nextchessmove.com/dev-builds Each change is tested against Stockfish 7 in a trial of 20,000 random games. The randomness leaves room for variation. However, in the last 15 trials covering the last 15 changes, the Elo differential above Stockfish ...

The notation for evaluation in centipawns with depth of analysis has several formats. PGN standards do not set a particular style. You are using the ChessBase style of the format [%eval -28,39]. The more common PGN style is the format {+0.20/25 4:19m} or {-0.04/11 81s}. It also includes the time for...

McBurney

Hi, I think the way to do this is to use "epdMaterial" to extract the epd records with the precise material, then follow up with "pgnPosition" which is a script utilizing "epdPosition". Summary: Use the output file from "epdMaterial", which is "outV.epd", and rename it to "search.epd". Then use "sea...

The 2nd position is 2 moves down from the first position.

1. Nc2-e3+ Kc4-b3 2. c6-c7 b5-b4

Black made a fortress so that if White promotes to a Queen it is a stalemate if 3. R-f1+ Nxf1 is stalemate. (3. Qc1 loses).

White has to do an underpromotion - bishop which will try to get to checkmate at d1.

This is the closest that I found in scid.eco, which is the database SCID uses for ECO. The only difference is that this position has one more White move ( Nge2 ). rn1qkbnr/pp3ppp/2p1p1b1/3pP3/3P2P1/2N5/PPP1NP1P/R1BQKB1R b KQkq - eco B12w Caro-Kann: Advance, Main Line, 6.Nge2; compared to the origina...

Is this an error?

1r3rk1/3qbppp/p1npb3/1p1Np3/4P2P/2PBN3/PP3PP1/R2QK2R w KQ - bm a4; c0 "Nf5=10, a4=9, Qf3=9, Bc2=8";
1r3rk1/3qbppp/p1npb3/1p1Np3/4P2P/2PBN3/PP3PP1/R2QK2R w KQ - bm a4; c0 "Nf5=10, a4=3, Qf3=1, Bc2=0";

I just want to add a few suggestions on filtering pgn games before using them to build a book. 1. Limit games to quality players in quality events. For example, minimum elo 2300+, no exhibitions. 2. Limit games to comparable opponents. For example, elo difference could have a maximum of 100. 3. Do n...