Search found 806 matches

by Norm Pollock
Fri Dec 25, 2020 7:14 pm
Forum: Computer Chess Club: General Topics
Topic: Tool to reverse a fen string
Replies: 12
Views: 712

Re: Tool to reverse a fen string

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...
by Norm Pollock
Sun Nov 15, 2020 4:41 pm
Forum: Computer Chess Club: General Topics
Topic: Stockfish developmental progess on pause?
Replies: 2
Views: 613

Stockfish developmental progess on pause?

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 ...
by Norm Pollock
Sat Jul 25, 2020 1:55 pm
Forum: Computer Chess Club: General Topics
Topic: a tool, that can read already Annotated Games
Replies: 6
Views: 1189

Re: a tool, that can read already Annotated Games

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...
by Norm Pollock
Thu Jul 16, 2020 12:32 am
Forum: Computer Chess Club: General Topics
Topic: games with material balance
Replies: 6
Views: 1223

Re: games with material balance

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...
by Norm Pollock
Sun Jun 14, 2020 1:37 pm
Forum: Computer Chess Club: General Topics
Topic: Puzzle of the day
Replies: 2
Views: 477

Re: Puzzle of the day

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.
by Norm Pollock
Sun Jun 07, 2020 2:49 am
Forum: Computer Chess Club: General Topics
Topic: Is there a name for this opening?
Replies: 13
Views: 1626

Re: Is there a name for this opening?

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...
by Norm Pollock
Mon Apr 06, 2020 10:53 pm
Forum: Computer Chess Club: General Topics
Topic: MEA and temere.epd
Replies: 82
Views: 12848

Re: MEA and temere.epd

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";
by Norm Pollock
Mon Mar 30, 2020 4:38 pm
Forum: Computer Chess Club: General Topics
Topic: Advice on book building
Replies: 30
Views: 3185

Re: Advice on book building

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...
by Norm Pollock
Mon Mar 23, 2020 1:15 am
Forum: Computer Chess Club: General Topics
Topic: Looking for a PGN utility to remove chess960/frc games
Replies: 5
Views: 902

Re: Looking for a PGN utility to remove chess960/frc games

The tool "fenRemove" in 40H-PGN tool box http://komodochess.com/pub/40H-pgn-utilities/ Here is the readme: =========================(18) fenRemove ============================ "fenRemove" removes games containing a "FEN" tag except when the "FEN" position is the standard opening position. The output...