NFL Power Sweep

Game description from the box:

"NFL Power Sweep is a game of both offense and defense. A player cannot win by concentrating on one phase of the game and neglecting the other. While advancing on an opponent's goal, he must also protect his goal. A player should be particularly aware of the position of both his and his opponent's backs at all times. They are the "power men." Their versatility provides the offensive thrust of the game, and the need for good defensive planning."

Basically, this is a game of Chess with football players.