Animal checker-Puzzle Game

1. At the beginning of the game, the player randomly flips the pieces, and the color that is turned over will determine the color of the two sides.
2. Each player can control one piece to move only one square.
3. The order of the size of the pieces: mouse > elephant > lion > tiger > leopard > wolf > dog > cat > mouse, if the same pieces collide, both will disappear
4. If the two sides do not eat each other's pieces in 20 consecutive steps, they will automatically judge the game to end peacefully.
5. In the end, if only one piece is left on both sides, the pieces will win in large order. The same as the chess pieces of both sides is a draw