Battleship II © 1977 Ball, John.
An enemy ship is hidden in a 100x100 grid. The player may fire shots at coordinates in an attempt to hit it. After each shot the distance between the impact and the ship is made known also the enemy ship moves a number of units. When hits are within five units of the ship a minor hit is scored and the ship will move further. Five minor hits make a win. If the impact is less than one unit away from the ship, the ship is instantly destroyed and the player wins the game.
Written by: John Ball