The game of "battleboats" has an interesting feature that sets it apart from the majority of other games on this site:
While it is a turn-based game, the strategy of how to play your turns depends very little on what your opponents do on their turns.
I think that this feature is worth exploring in an additional Battleboats variant which I propose being named "Dark Battleboats Barrage".
In this variant, play would be as in normal Dark Battleboats, however neither player would have to wait for the other player before continuing on to their next turns.
As soon as both boards are set up, each player can take as many turns in a row as they like. The winner will be the player who sinks her or his opponent's ships in the least number of turns. (If they take the same number of turns, then the game will be a draw. As such, neither white nor black should have any statistical advantage.)