I can add that there no longer is a need to use different piece ID for the across-the-river Pawn, as when there are two piece types with the same ID, mentioning that ID as a promotion/morph piece is automatically taken to mean the type that is not the current one. (And if neither type with that ID is the current one, it would promote to the type mentioned in the piece table last.)
I can add that there no longer is a need to use different piece ID for the across-the-river Pawn, as when there are two piece types with the same ID, mentioning that ID as a promotion/morph piece is automatically taken to mean the type that is not the current one. (And if neither type with that ID is the current one, it would promote to the type mentioned in the piece table last.)