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Subject: Re: EPD book question

Author: Dann Corbit

Date: 17:00:56 09/26/05

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On September 26, 2005 at 19:10:39, Andres Valverde wrote:

>Hi,
>
>I am building a book file for my little engine. It consist in a text files with
>lines like this :
>
>rr4k1/3nppbp/5np1/q1pPN3/8/2N3PP/PP3PK1/R1BQR3 b - - c0:d7e5 ce:50
>rr4k1/3nppbp/3p1np1/q1pPP3/8/2N2NPP/PP3PK1/R1BQR3 b - - c0:d6e5 ce:50
>rr4k1/3nppbp/3p1np1/q1pP4/4P3/2N2NPP/PP3PK1/R1BQR3 w - - c0:e4e5 ce:50
>rr4k1/2qnbppp/p2pb3/1p2p1Pn/4P2P/1NN1BP2/PPP2Q2/1K1R1B1R w - - c0:f3f4 ce:50
>rqb2rk1/pp2bppp/2nppn2/1N6/4PP2/2N1B3/PPP1B1PP/R2Q1RK1 w - - c0:a2a4 ce:50
>rqb1kbnr/pp1ppppp/2n5/1N6/4P3/8/PPP2PPP/RNBQKB1R w KQkq - c0:f1d3 ce:50
>rqb1kbnr/pp1ppppp/2n5/1N6/4P3/8/PPP2PPP/RNBQKB1R w KQkq - c0:c2c4 ce:33
>.....
>
>The EPD lines are extracted from PGN files and the "ce:x" code is the % scored
>by side to play. The question is: what is the best opcode for the move? "bm:"?
>"cO" as a comment. I would like to make books that other people could read/write
>with any EPD tool.

I would use pm (predicted move) unless there is a move that your engine cannot
calculate and you know to be superior -- in that case use bm.  And also I would
suggest standard EPD records.  Separate segments with semicolons and lose the
non-standard colons.

IMO-YMMV.
So this:
rqb1kbnr/pp1ppppp/2n5/1N6/4P3/8/PPP2PPP/RNBQKB1R w KQkq - c0:c2c4 ce:33
becomes this:
rqb1kbnr/pp1ppppp/2n5/1N6/4P3/8/PPP2PPP/RNBQKB1R w KQkq - pm c2c4; ce 33;

I also think SAN is better than coordinate, but to each his tastes.



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