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Subject: Re: Is this where the 174 bit minimal figure comes from?

Author: Dann Corbit

Date: 20:08:33 05/17/99

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On May 17, 1999 at 22:56:18, KarinsDad wrote:
[snip]
>This 174 does not include promotions.
>
>Actually, the 174 bits in the other posts came from a different scheme:
>
>100 bits 30 pieces and pawns packed
>12 bits kings and castling
>61 bits (62 remaining squares bitboard - last one not needed)
>1 bit side to move
>
>or something to this affect (but I do not know where ep fits into this, maybe
>into the kings structure).

OK, stupid question time:

Why do we need to store promotions for a position?  After all, who cares how I
got there.  And if the piece information must be retrieved from this format, I
could just consider the delta between this position and the previous one.

There seems to be something major that I am missing here...



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