I'm not sure what you mean. By the rules of Chess960 he can castle from either b1 or g1 (b8/g8 for black), and can do so either queenside or kingside.
If you're saying you can't do that while playing online, just move the king onto appropriate rook.
If you're saying he shouldn't be able to castle in that position, I disagree. Allowing castling is what separates Chess960 from Shuffle Chess, and keeps it similar to Chess while voiding opening memorization.
there is one rule of casteling the king moves
two towards the rook and the rook moves towards the king until the rook is one past the rook
there is one rule of casteling the king moves
two towards the rook and the rook moves towards the king until the rook is one past the rook
Not in Chess960. See post #2 "just move the king onto appropriate rook."
Not in Chess960. See post #2 "...just move the king onto appropriate rook"
http://support.chess.com/Knowledgebase/Article/View/143/16/how-do-i-castle-in-a-chess960-game "... click first on the King, then on the Rook"
If the king can't move over two no castling (like when king is on knight 1).