🔢 Sudoku Pro

How to play

Sudoku Pro is the classic 9×9 number puzzle. Every row, every column and each of the nine 3×3 boxes must contain the digits 1–9 exactly once. Tap a square to select it, then tap a number on the pad or press a key to fill it in. Locked givens can't be changed — your job is to deduce the rest with pure logic. Three wrong guesses end the run, so think before you commit.

Controls

• Mouse / touch: tap a cell to select it, then tap 1–9 on the number pad. Toggle the ✏️ Notes button to jot pencil marks instead of answers.
• Keyboard: 1–9 fills the selected cell, arrow keys move the selection, Backspace/Delete erases, N toggles notes, H spends a hint.
• Buttons: Easy (44 clues), Medium (36) and Hard (30) deal a fresh puzzle at that level; New Game reshuffles at the current level.

Tips & strategy

• Scan for the digit that appears most — its remaining spots are usually the easiest to pin down.
• Use pencil marks in crowded boxes; a cell left with a single candidate is a free answer.
• Every puzzle here is generated with exactly one solution, so every move is provable — guessing is never required.
• Save your three hints for the late game, when one stubborn cell blocks everything else.

Scoring

Every correct digit scores +10; wrong guesses cost one of your three mistakes instead of points. Finish the grid to win — your final time and mistake count appear on the victory screen. Beat your own best time on Hard for the ultimate bragging rights.