Sudoku
Nine rows, nine columns, nine boxes: fill them all with 1 to 9. A new puzzle every time, in four levels.
- Solo
Sea Mines
Open every square without touching a mine. Each number tells how many mines lie around it, and your first square is always safe.
Paused
00:00
Level
Deal
How to play
Open every square that hides no mine. A number tells how many of the eight squares around it hide one; set a buoy on each mine you find.
The harbor
Easy is 9 × 9 with 10 mines, Medium 16 × 16 with 40 and Hard 30 × 16 with 99. On a phone or a narrow window Hard turns, 16 across and 30 down, so its squares stay larger. The mines are laid when you open your first square, never on it or the eight around it, so it always opens a stretch of water.
Deals
On No guessing, every board is one a solver here has cleared from your first square by reasoning alone, every step forced by the numbers and the mines left. On Random, the mines lie anywhere else, and now and then a board leaves you a guess. A new visitor starts on Medium and No guessing. Until the clock starts, Level and Deal deal a new board at once; then they are locked until the game ends or New game deals the next one.
Opening and buoys
Tap or click a square to open it; a square with no mine around it opens the water around it too. With Buoy pressed on the pad, a tap sets a buoy on a closed square instead, and the same again takes it off; a right-click, or a finger held on a square, sets one whichever is pressed. Tap a number whose buoys are all set to open the rest around it. Buoy shows how many mines are still unmarked.
The end
Opening a mine ends the game: every mine shows, the one you hit on Coral, and a buoy where there was no mine is crossed out; Try again plays the same board from the start, and New game deals a new one. Opening the last safe square clears the harbor: buoys go on every mine, the board ripples and the inset says Solved in, with your time.
Controls
The clock starts with Play or your first square or buoy; Pause stops it, and it stops by itself while the page is out of sight. With a keyboard on the board, the arrows move between squares, Enter or Space opens, B or F sets a buoy and P pauses.
The game in progress (the board, what is open and buoyed, Level, Deal and the clock) is kept in this browser once it starts and comes back paused; New game and Try again replace it.
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