Battleship

BATTLESHIP

Five different types of ships:
1. Carrier (5)
2. Submarine (3)
3. Destroyer (3)
4. Battleship (4)
5. PT (2)

Board:
A-J (x-axis)
1-10 (y-axis)

Gameplay:
1. You and I place our ships
2. Take turns firing on the other, by sending a coordinate IE: "B", "2"
   Response:
    1. miss
    2. hit
    3. sunk (battleship)
    4. sunk, win the game

Clarifications:
1. Multiplayer (you have a machine, I have a machine)
2. We already have the same URL battleshipgame.com/abc123
3. No DB. Store everything in memory. Assume there's just one instance.