Chess Game

Standard Chess (Western Chess, International Chess) rules：

1. King：You will lose if the piece is taken. You can only go straight, horizontal or diagonal, one step at a time.

2. Queen：You can only go straight, horizontal or diagonal, as long as there is no obstacle, you can move in any distance.

3. Castle：You can only go straight and horizontal, as long as there is no obstacle, you can move in any distance.

4. Bishop：You can only go diagonal, as long as there is no obstacle, you can move in any distance.

5. Knight：One step forward in any direction and one step diagonally.

6. Pawn：The first step can be one step forward or two steps. After that, you can only go one step at a time, and eat the opponent's piece diagonally in front of you. When a Pawn goes to the bottom line, it can be upgraded to a Castle, Knight, Bishop, or Queen.