PREVIOUSLY KNOWN CLASSES:
Tank
Projectile
ProjectileAP
ProjectileHE

NEW CLASSES:
1> Iteration 0: Initial Abstractions
Game - the main application class
Board - the 8x8 grid battlefield
Player - represents a player in the the game
Tank - represents an armor vehicle
Projectile - represents a bullet that tanks fire

2> Iteration 1: Top-Level Abstractions

Game class
- board: Board
- players: Player[]
- currentTurn: Integer
+ start()
+ processMovement(Player, Direction)
+ processShot(Player, Projectile, Position)
+ nextTurn()
+ isGameOver()

Board class
- cells: Cell[][]
- size: Integer
+ Board(Integer size)
+ getCell(Position pos)
+ isValidPosition(Position pos)
+ placeTank(Tank tank, Position pos)
+ moveTank(Tank tank, Position newPos)
+ getTanksInRadius(Position center, Integer radius)

Cell class
- position: Position
- tank: Tank
+ Cell(Position pos)
+ isEmpty()
+ setTank(Tank t)
+ getTank()

Position class
- x: Integer
- y: Integer
+ Position(Integer x, Integer y)
+ getDistance(Position other)
+ getAdjacent()

Player class
- id: Integer
- tanks: Tank[]
- control: Controls
+ Player(Integer id, Controls controls)
+ addTank(Tank tank)
+ removeTank(Tank tank)
+ hasLost()
+ getActiveTank()
+ nextTank()

Controls class
- moveUp: KeyCode
- moveDown: KeyCode
- turnCannonLeft: KeyCode
- turnCannonRight: KeyCode
- fireKey: KeyCode
+ createPlayer1Control()
+ createPlayer2Control()