Right! Pawn moves to C8, promoting to knight! This checks the black king and this move also uncovered the check from the white rook! Since both pieces check and both checks cannot be stopped, this is the rare double checkmate! You earned the super-rare gray belt!
Homepage
Since you got this correct you get to know the tenth and final letter of the
password to the game page: Y! Now go to the Home Page and find the final balloon to take you to the password page!