Ambush is played with two copies of a small grid of triangles. Players start at opposite ends of the grid and move one space a turn; the spaces are the vertices. One player's copy of the grid is visible to both players (this player is the "Scout"). The other player's copy is hidden; this player moves first (and is the "Indian"). The object of the openly-moving player is to reach the opposite end of the grid. The object of the other player is to be in the space that the openly-moving player enters, in which case he is ambushed and loses. The hidden player may not move into the other player's space.