How to play Battleship

1. Place five ships (5, 4, 3, 3 and 2 cells) on the 10 by 10 grid. Tap an empty cell to drop the chosen ship there, tap a ship to rotate it, drag a ship to move it.
2. Take turns firing at a cell on your opponent's grid. A ✕ is a hit, a • is a miss, a ✖ means a ship went down.
3. Sink all five enemy ships first to win.
4. Rules: Classic is one shot per turn. Shoot again gives an extra shot after every hit. Salvo lets you fire one shot per ship you still have afloat, all at once.
5. Online, each fleet is locked in with a fingerprint before play and shown at the end, so nobody can lie about a hit.