In the game of coregal chess both the king and queen are royal. Just as the king in usual chess, the queen can be checked and mated. Therefore it is not allowed to make a move such that the queen can be captured. When your queen is attacked, you must play a move such that the queen is no longer attacked. You lose the game when your queen is attacked and you cannot make a legal move that avoids the attack. The rules of check to the king, and mate of the king remain as always. Queens may move across attacked squares. When you promote a pawn to queen, that additional queen also is royal, i.e., subject to check and mate. Thus, underpromotion, e.g., to rook may be in many case a better strategy. Queens can check kings at a distance, but they cannot check queens. Kings and queens may castle, both long and short, following usual castling rules.