Sudoku Fog icon Sudoku Fog by TriTail Studio

A new kind of sudoku

Sudoku, hidden in the fog

Every number you solve clears the mist. A brand-new twist on classic sudoku — play one free round, right in your browser.

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Sudoku Fog board half-hidden in mist

What is Fog Sudoku?

Fog Sudoku is classic 9×9 sudoku covered in mist.

How it works

  1. Start in the fog

  2. Solve to reveal

  3. Chain the clear

More in the full game

Frequently asked questions

What is fog sudoku?

Is it free to play?

Do I need to install anything?

How is it different from normal sudoku?

I built Sudoku Fog because after years of solving Sudoku, I realized I missed the feeling of discovering something new.

Read the story →

Play one puzzle. You'll know in five minutes whether Sudoku Fog clicks.

Play a round — free