Pythagoras: Why not have castling? You click the square two squares from the King, your opponent will either make the castle or move the Rook there or any other piece that can move there. I don't see what the problem is if castling was allowed. So why isn't it allowed as an option? As long as it doesn't move the King into check it should be OK to have it. IS there a problem I haven't considered with having castling that makes the game unplayable or unfair in some way? Like castling out of check? There's no check in this game, so that would make for some decision to how the rules are worded if one attempts to castle when his King is under attack. Are you allowed to leave your King in check?