Red Sudoku
About the Game
Red Sudoku is a classic 9×9 number puzzle presented in a bold Soviet poster–inspired style. The game combines strict geometry, a limited color palette, and a minimalist interface focused entirely on logic and concentration. Choose from three difficulty levels — Easy, Medium, or Hard — and solve puzzles at your own pace. Your progress is saved automatically, allowing you to return and continue whenever you like. Red Sudoku runs directly in the browser and requires no installation.
How to Play
The goal of the game is to fill the 9×9 grid with numbers from 1 to 9 so that:
each row contains each number only once
each column contains each number only once
each 3×3 subgrid contains each number only once
Click on an empty cell and select a number.
Starting numbers cannot be changed.
If a mistake is made, the game highlights it visually.
When all cells are filled correctly, the puzzle is completed.
