This is a well-known two-player board game. We wrote this game for sentimental reasons remembering our school time. May be you too remember hidden squared papers, low calls to your school comrade: "G-4" - "Hit !" - "Ship sunken...". This game allows you to hide 7 towns on a 10 X 10 grid, and then take turns beaming shells at your opponent. A player gets 1 shell for each surviving town per beam. The player that finds and destroys all opponents towns first wins.