Those with higher levels can capture the opponent's chess pieces that are lower than themselves or of the same level (except for kings and assassins).
The king can capture any of the opponent's pieces except the assassin;
Assassins are the lowest level, but can eat the opponent's king.
Both players take turns playing chess (including flipping chess, making moves, and capturing pieces).

The chessboard grid is 6x6, with a total of 36 chess pieces, 18 for each of the red and blue sides. At the beginning, the chess pieces are dark and cannot be operated. You must open the chess pieces first and then you can participate in the game.