Mini Games
Sea Battle
Hide your fleet of 5 ships on a 10x10 grid and sink the computer's fleet first. Fewer shots win.
How to play
- Hide your fleet of 5 ships (5, 4, 3, 3 and 2 cells) on a 10×10 grid. Ships may touch but can’t overlap.
- Take turns firing at the enemy grid. Orange means a hit, a gray dot means a miss.
- One shot per turn, hit or miss. Hit every cell of a ship to sink it.
- Sink the whole enemy fleet first to win. The fewer shots you need, the better your score.
AI level
Once it scores a hit, it hunts the cells around it.
My best win
---
Only wins are recorded. Fewer shots ranks higher.
Ranking
| Rank | Nickname | Score |
|---|---|---|
| Rank | Nickname | Score |
|---|---|---|
- |  You | - |
Your record is only saved in this browser.
Records are not shared across different browsers or devices.
Recommended Content
Play Gomoku (Five in a Row) with a friend via invite link, or take on an AI from 9 kyu to 9 dan.
Play free Klondike Solitaire in your browser — build four suits from Ace to King, Draw 1 or 3, no download.
Tap matching tiles and link them with a line of two turns or fewer before the timer runs out.
Play real-time Othello (Reversi) with friends! Sandwich your opponent's pieces on an 8×8 board, flip them, and win with the most discs.
Sort 16 words into four hidden groups of four. One new puzzle a day; the fourth mistake ends the game.
Break enemy armor, trigger chain explosions, and survive wave after wave with three lives.
Read a famous line and pick who really said it from four names.
MBTI compatibility read through cognitive functions — not just letter matching. Love, friendship and work scores for all 256 pairings, free.
Sea Battle is the classic grid-and-coordinates game, free to play online against the computer. You and the AI each hide a fleet of five ships (5, 4, 3, 3 and 2 cells long) on a 10x10 grid. Place them randomly in one tap or place them yourself with a tap and rotate as you like. Then take turns firing one shot at a coordinate. Every shot is marked as a hit, a miss or a sunk ship, and the first side to sink the whole enemy fleet wins. Pick easy, normal or hard AI: normal hunts around every hit, hard plays the odds with a probability map. Your result shows win or loss, total shots, accuracy and time. Send a challenge link to see which friend needs fewer shots, or share a result image. No download or sign-up, on mobile and PC.
Frequently Asked Questions
Q. How do you play Sea Battle?
A. Place your five ships (5, 4, 3, 3 and 2 cells) on a 10x10 grid, randomly or by hand with rotation. You and the computer then take turns firing one shot at a coordinate. Hits, misses and sunk ships are marked, and whoever sinks the entire enemy fleet first wins.
Q. What is the difference between the easy, normal and hard AI?
A. Easy fires completely at random. Normal hunts the neighboring cells once it scores a hit, while hard aims with a probability map and a checkerboard search, then finishes off any ship it has hit. Start on easy to learn, then test your strategy on hard.
Q. What is a good Sea Battle strategy?
A. Spread your early shots in a checkerboard pattern, since every ship covers at least two cells. After a hit, fire at the neighboring cells to find the ship's direction. Fewer shots means a better score to beat in the challenge link.