H. G. Muller wrote on Tue, Oct 22, 2019 09:49 AM UTC:
I am a bit worried about this paragraph that states a dropped Rook is considered virgin (and thus fit for castling). As far as I know there doesn't exist any on-line server that uses this rule, or any engine that plays by this rule. It is also a very weird rule: when you move a Rook you lose castling rights, and moving it back to a corner normally doesn't restore them. And a drop move is a move like any other.
I am a bit worried about this paragraph that states a dropped Rook is considered virgin (and thus fit for castling). As far as I know there doesn't exist any on-line server that uses this rule, or any engine that plays by this rule. It is also a very weird rule: when you move a Rook you lose castling rights, and moving it back to a corner normally doesn't restore them. And a drop move is a move like any other.