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Subject: Re: EPD book question

Author: Dann Corbit

Date: 13:47:58 09/27/05

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On September 27, 2005 at 02:21:08, Marc Lacrosse wrote:

>On September 26, 2005 at 20:00:56, Dann Corbit wrote:
>
>>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.
>
>Hi Dann,
>
>I am not to familiar with EPDs.
>Is there a way to store a position with multiple evaluations through opcodes
>(not only one single pm or bm)?
>
>I think :
>1. the position plus
>2. Shredder - depth 15 (or time 300) - bm e2e4 - eval 0.55 - second bm d2d4 plus
>3. Fruit - depth 15 - bm d2d4 - ...
>
>all in one single line, and so on for each position.
>
>and in case it's possible, do you know a program which is able to read and/or
>produce such data ?

You can do that, but it will require more than one EPD record.  Simply record
the pm and ce for each new instance.



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