🧩 Sudoku
Classic 9×9 logic puzzle with three difficulties.
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How to Play Sudoku
- Fill the 9×9 grid so every row, column and 3×3 box contains the digits 1 to 9 exactly once.
- Tap an empty cell, then choose a digit to place it.
- Use notes mode to pencil in candidate digits while you reason.
- The puzzle is solved when every cell is filled without conflicts.
Tips & Strategy
- Scan for digits that already appear 7–8 times — their last positions are often forced.
- Start with the rows, columns or boxes that are most filled in.
- When stuck, write notes: cells with a single remaining candidate are free moves.
Sudoku — Frequently Asked Questions
Are the Sudoku puzzles always solvable?
Yes. Every generated board has exactly one valid solution and can be solved with pure logic — no guessing required.
What is the difference between the difficulty levels?
Harder levels start with fewer given digits, so you need longer chains of deduction to make progress.
Can I check my mistakes?
Yes, conflicting digits are highlighted so you can spot errors as soon as they happen.