The Russian rules: ten ships each on a ten by ten grid, one battleship of four squares, two cruisers of three, three destroyers of two and four boats of one. Ships may not touch each other, not even at a corner, so every ship sits in its own ring of open water. Both fleets go down before anyone shoots, then you call squares on their waters. A hit keeps you firing and only a miss hands the turn over, so a good streak can take a whole fleet apart in one go. When a ship goes down the water around it is marked for you, because the rules already say nothing can be standing there. The match is refereed by a server that owns both fleets, which is the only way a game of hidden information works in a browser. Your ships are in your page and theirs are not, and the only thing you are ever told about their side is where you fired, whether it hit, and which of their ships have already gone down. Nothing is ranked here, because half of this game is the coin toss that is which square you tried first, but a finished match still pays arcade coins.