Sudoku
Fill the grid so every row, column and 3x3 box contains 1-9.
About Sudoku
A classic logic-based number placement puzzle. The objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 subgrids that compose the grid contain all of the digits from 1 to 9.
Sudoku is the world's most popular logic puzzle. Our free online version offers multiple difficulty levels, from beginner-friendly easy grids to expert-level brain busters. Use pencil marks, logical deduction, and advanced techniques like naked pairs and X-wings to solve each grid. Sudoku is proven to improve concentration, memory, and logical thinking — making it both fun and beneficial for your brain.
Key Features
How to Play Sudoku
Select an empty cell and choose a number from 1 to 9.
Each row, column, and 3x3 block must contain the numbers 1-9 without repeating.
Use notes to keep track of possible numbers for a cell.
Find the logical solution to complete the board.
Frequently Asked Questions
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