Sudoku

How to Play

- Tap or click an empty cell to select it, then tap a number 1-9 to place it - Correct numbers stay in green, wrong answers flash red and count as mistakes - 5 mistakes ends the game - Toggle Notes mode to pencil in candidate numbers - Use Hint to reveal the correct number for the selected cell - Use Erase to clear a cell and Undo to reverse your last action - On desktop: number keys 1-9, arrow keys to navigate, N for notes, H for hint, Delete to erase, Ctrl+Z to undo

Game Description

Sudoku is the timeless number puzzle that has captivated millions around the world, brought to life here with a polished, modern feel. Your goal is simple but endlessly rewarding — fill every row, every column, and every 3x3 box with the numbers 1 through 9, without ever repeating a single digit within any region. Pick your challenge level from Easy to Expert. Easier puzzles give you more starting numbers to work with, perfect for a relaxing session or for players just learning the ropes. Harder puzzles leave most of the board empty, demanding careful logic, pattern recognition, and a steady hand. Every puzzle is guaranteed to have a single correct solution, so there's no guessing required — just pure deduction. Personalize your experience with four distinct themes. Classic gives you the sleek dark blue look. Light offers a clean, bright interface for daytime play. Paper recreates the warm feel of solving on a notebook page. Wood wraps the board in rich, cozy brown tones.