Playing a French game should not make a difference. 🙂 Actually move the King in the desired direction and RHP moves the Rook for you. Pink squares indicate an illegal move, I think.
Originally posted by RevRSleeker FR = Fischer random.. Is it supported ?
Castling is not supported in fischer random. One way to circumvent the problem is to do another set piece game with the previous position, with king castled and giving the move to the opponent.