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Subject: Re: BWTC 930 series (bm vs. pv)

Author: Steve Coladonato

Date: 11:30:13 09/05/00

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On September 05, 2000 at 13:03:52, Larry Griffiths wrote:

>I have been running the BWTC (Brilliant Ways to Checkmate) tests.
>
>I downloaded 2 different versions of BWTC with different dates.  The suite with
>an earlier date seems to be fixed up better that the one with a later date.
>
>I noticed that some positions have more than 1 best move.  The fixed up version
>has some of these multiple best moves like "bm Ra1 Qe4".
>
>At about test 930 in BWTC there are several positions that can have 7 or 8 best
>moves but they are not in the test suite I am using.
>
>Is there a limit to how many bestmoves can follow the "bm".
>
>If not, does anybody know where I can get a really clean version of BWTC?
>
>Larry.

I don't have the answer Larry is looking for but I would appreciate a
clarification on "bm" vs. "pv".  It is my understanding that what follows "bm"
is a list of candidate "best moves" for the position.  All moves in the list to
be made by either white or black (whichever side it is to move in the position).
 And that what follows "pv" is the "principal variation" from the position with
moves for both white and black.

In the case of "bm" in the EPD, is an evaluation, "ce", appropriate or is an
evaluation only appropriate for "pv".  Also, can "bm" and "pv" both be in the
EPD for a position?

Steve



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