Sudoku 9x9
Classic 9×9 sudoku across four tiers from Easy to Expert, with pencil notes and a hint that names the exact technique for your next step.
Play nowHow to play
Controls
TapKeyboard←→↑↓ N- Tap a cell, then a number.
- Every row, column and 3×3 box holds 1 to 9 once.
- Keys: arrows and 1-9, N for notes.
About the game
Sudoku 9x9 is the classic number puzzle. Fill the grid so that every row, every column and every 3×3 box holds the numbers 1 to 9 exactly once. Thirty-six puzzles are split into four tiers, Easy, Medium, Hard and Expert, and each tier is graded by the techniques it really needs, from simple singles up to pointing, pairs and the X-Wing.
The hint does more than fill in a cell. It finds the next logical step from your current board, names the technique and lights up the cells that prove it, so you learn the method instead of just the answer. Pencil notes clear themselves when you place a number, repeated digits are marked at once, and undo is unlimited. Every puzzle has one solution and needs no guessing.
Free to play in your browser. No download, no sign-up. Works on phones, tablets and computers. Your progress is saved on this device.
