coan.net: Nice ideas, I like the Moving Battleboats best!
Here's another: We already have Behemoth Chess, so why not Leviathan Battleboats? It would be like "plain" Battleboats (one shot per turn), except the "beast" strikes at a random square on each turn, so effectively you have two shots. The random factor means you would have to adjust your shooting pattern during the game.
(hide) If you are interested in a progress of a tournament you are playing, you can discuss it with your opponents at this tournament's discussion board. (HelenaTanein) (show all tips)