Goal: win by moving any piece into the opponent's den (the crown square), or by capturing every enemy piece.

Moving: Blue moves first. Click one of your pieces, then click a highlighted square — green dot = move, red ring = capture. Pieces move one square up, down, left, or right (never diagonally).

Ranks (strong → weak): Elephant, Lion, Tiger, Leopard, Wolf, Dog, Cat, Rat. You may capture an enemy piece of equal or lower rank on the square you move to — with one twist: the Rat may capture the Elephant, but the Elephant can never capture the Rat.

• Rivers (blue): only the Rat may swim. A Rat in the water cannot be attacked from land and cannot attack pieces on land; Rat-vs-Rat fights happen only on the same terrain.
• River jumps: the Lion leaps over a river in a straight line — sideways or along its length — landing on the first land square beyond; the Tiger leaps sideways only. The leap may capture on landing. A Rat on any water square in the path blocks the jump.
• Traps (brown squares beside each den): an enemy piece standing in one of your traps loses all strength — any of your pieces may capture it. Your own traps never harm you.
• Dens: you can never enter your own den.

Also: a player with no legal move loses; 50 moves by each side without a capture is a draw. In-game buttons: Undo, Flip board (view only), Mute, Menu.