Which method do you use to set up the position? If you drag a Rook to a new square, it will never have castling rights there. But if you left-click a Rook that is already selected, you toggle its castling rights. The new state of the rights is displayed in the message field above the board.
Op wo., nov. 3, 2021 om 14:18, Richard Trahan <doctortrahan@gmail.com> schreef:
If I use Edit Game on a fresh board, the system has no problem castling.
If I first use Edit Position to set up the board to some midgame state, and then switch to Edit Game, the system will not allow a castle. It complains that it's an illegal move.