Play a friend · or the computer
Sea Battle
Hide your fleet. Hunt theirs. First to sink every ship wins.
You get a link to send. Play live together, or one turn at a time whenever you both have a minute.
Your games
You’ve been challenged to Sea Battle!
Send this to your friendThe battle starts when they join. Place your fleet while you wait.
How to play Sea Battle
Each player hides a fleet on their own grid. Take turns firing at a square on the other player’s grid: the game tells you whether you hit open water or a ship. When every square of a ship has been hit, it sinks. Sink the whole enemy fleet first to win.
- Quick is an 8×8 sea with four ships (sizes 4, 3, 3 and 2): great for younger captains and short games.
- Classic is the full 10×10 sea with five ships (5, 4, 3, 3 and 2).
- Ships go across or down, and can sit right next to each other.
Playing a friend
Tap Play a friend and send the link. Your friend opens it on their own phone and joins. Nobody can see the other fleet: the ships stay on the CogniBump server until the game ends. Play live together, or take a turn whenever you’re free. The game waits, and either phone can pick it back up from the same link.
Playing the computer
- Rookie fires mostly at random. A good first opponent.
- Pro hunts in a checkerboard pattern and finishes off any ship it hits.
- Genius works out every place your ships could still be hiding and fires at the likeliest square.
Tips
- After a hit, try the squares next to it. Two hits in a row tell you which way the ship runs.
- While hunting, fire on a checkerboard: every ship is at least two long, so you can skip half the squares.
- Don’t pack your fleet into one corner. Spread it out, and mix across and down.
Free, no app, no account. Works on any phone or computer.