Author: Jon Dart
Date: 20:51:32 09/09/03
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On September 09, 2003 at 18:33:22, Steven Edwards wrote:
>FEN: One deficiency exists for which I take responsibility; the en passant
>target square semantics should indicate a non null value only if an active color
>pawn attacks the passed-over target square. A change here will improve position
>database operation and can also have a positive effect on internal transposition
>management. Also, there is the possibility of extending the castling
>availability semantics to accommodate heterodox / unorthodox chess.
Even in normal chess, if you take into account the previous history of the game,
there are six possible castling statuses. Arasan names these as follows:
CanCastleEitherSide,
CanCastleKSide,
CanCastleQSide,
CastledKSide,
CastledQSide,
CantCastleEitherSide
FEN can't currently distinguish these: it can only indicate whether or not
castling is possible, not whether or not it has occurred.
>4. The centipawn evaluation operand type needs a mate score indication
>correction.
>
>5. The centipawn evaluation operand type probably needs to be deprecated and
>replaced with a pawn evaluation operand type with a provision for sub-pawn
>decimal resolution.
I don't really understand these.
--Jon
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