Crows and eagles take turns to go. Must first seven crows into the chessboard, then in the board to move the crow, the crow can only move to adjacent empty points; eagle can be moved to adjacent empty points, or skip the crows along the direction of a straight line to the next empty points, the Hawks skipped a crow can eat a crow. Game total of 3 minutes, successfully intercepted Eagles within three minutes, the game ends. Crow to be eaten, the less, and intercepted the Eagles, the higher the score.