TheObliquityOfTheEcl wrote on Mon, Oct 29, 2018 09:03 PM UTC:
"Pawns may only promote to a piece that has been taken by the opponent" is ambiguous. Does it mean:
A pawn may not promote to a piece unless at least one of the starting pieces has been taken (and thus the board will always have at most the same set of 7 capturable pieces), i.e. if my opponent captures my rook I may promote only one pawn to a rook and may not promote again until my opponent captures another piece; or
A pawn may promote to any piece that the opponent has ever captured, i.e. if my opponent captures my rook I may thereafter promote as many pawns to rooks as I please?
"Pawns may only promote to a piece that has been taken by the opponent" is ambiguous. Does it mean: