Attack and sink enemy submarines. If the opponent's submarine is in the square you indicated to attack, you successfully attack and win this game. This is a game in which you move your submarine using the six cards in your hand. Movement is done by placing three cards vertically, horizontally, or at different depths. The position of the enemy submarine is estimated by the cards placed by the opponent and sonar cards. Attack the enemy submarine with bomb, missile and torpedo attack cards. If the position and depth of the enemy submarine are within the attack range, the submarine can be sunk.