This game pits one player commanding the submarine against up to four players trying to sink it. The board is a set of linked concentric circles. The chasers start at bases around the outer circle. The submarine starts in the middle. Some arc and spoke segments show torpedoes.

Mechanism

Move and Capture

Rules

Only the submarine and a single chaser move in a given turn, and they move by only a single space. The chasers must force the submarine into the anti-submarine nets located at the top and bottom of the board. The submarine can eliminate a chaser by moving behind a torpedo that is pointing at a chaser immediately in front of it. The submarine wins by eliminating three chasers or killing two of them and then surviving for another 25 moves.