Fleet ready
Target sea
Ships sunk 0/3Your fleet
Ships sunk 0/3× Hit · • Miss · Hatching: sunk · Numbers identify your ships
Arrow keys move focus; Enter/Space places or fires. Scroll inside a large grid on a narrow screen. Hits also pass the turn.
Sea Battle
Hide a fleet and search the unknown sea. Follow a hit along a row or column, and sink the enemy ships before the computer finds yours.
Your actions0
Your shots0
About Sea Battle
Sea Battle is a hidden-fleet search game. You see your own ships and the results of your shots; the opposing fleet stays hidden until sunk or the battle ends.
Choose a quick search or a full fleet battle. Arrange your ships, pick a computer opponent and choose who fires first.
How to play Sea Battle
- 01Choose a quick 6×6 sea with ships of length 3, 2 and 2, or a classic 10×10 sea with ships of length 5, 4, 3, 3 and 2.
- 02Ships are straight, horizontal or vertical. They cannot overlap or cross the edge, but they may touch. Use the ready-made fleet or clear it and place each ship yourself.
- 03Start the battle to lock the fleet. Choose one unknown square on the target sea. A dot means miss, a cross means hit, and hatching marks a fully sunk ship.
- 04Players alternate one shot each, even after a hit. Repeated or invalid targets do not consume a turn. The first to sink every enemy ship wins immediately.
- 05Casual computer picks unseen squares at random. Search strategy uses only its announced hits, misses and sunk ships; it cannot see your unhit fleet.
- 06Restart map repeats both fleet layouts. New map creates a fresh sea. Saved unfinished battles restore paused in this browser. This is single-player against a computer, with no online rooms.
Sea Battle controls
- Mouse or touch
- Tap an unknown square in the target sea to fire. During setup, clear the fleet, choose an orientation and tap a starting square to place the next ship.
- Keyboard
- Use Tab and arrow keys to focus grid squares. Enter or Space places a ship or fires. Large grids scroll inside their panel.
- Battle controls
- Pause to stop play; resume to continue. Restart map repeats the fleets, while New map and setting changes start a fresh setup.
Sea Battle: levels and progress
Quick play uses a 6×6 board and 7 ship cells across three ships. Classic play uses 10×10 and 17 cells across five ships. Neither mode is a level campaign.
Casual targeting is random. Search strategy scores possible remaining ship placements and follows unresolved hits, using only announced information. This is a heuristic opponent, not a perfect solver.
Sea Battle tips and strategies
Search, then pursue
Spread early shots across areas that can hold the remaining ships. After a hit, look for its direction instead of abandoning the area.
Keep adjacent ships in mind
Touching is allowed. An apparent long chain of hits might span two ships; only a sunk announcement confirms which cells belong together.
Try a different fleet
Move ships away from your previous arrangement or change who fires first. Replaying a map is practice with known positions, not a fresh hidden-information challenge.
- Search broadly before a hit; afterward, test neighboring squares to find a ship’s direction.
- Ships may touch: a nearby hit may belong to another ship, so do not mark surrounding water as certain.
- Watch the remaining ship lengths and leave room for an entire straight ship when choosing a target.
Sea Battle FAQ
Is this multiplayer?
This version is one player against a computer. There are no online rooms or shared-device battles.
Does a hit grant another shot?
No. Every valid shot passes the turn, unless it sinks the last enemy ship and ends the battle.
Does the computer know my fleet?
Its targeting function only receives public shot results, sunk ships and remaining lengths. It does not receive unhit ship positions.
Can ships touch?
Yes. They can share an edge or a corner, but may not overlap. A ship is always one straight row or column.
How do the two seas differ?
The 6×6 sea has three ships and 7 ship cells. The 10×10 sea has five ships and 17 ship cells, so there is more space to search.
Does progress save?
Legal battle history is saved locally when browser storage is available. Unfinished battles resume paused; clearing browser data removes the save.