Guide
How to Play Sudoku
Sudoku is a logic game on a 9×9 grid. Fill every row, column, and 3×3 box with digits 1–9 — no repeats. No guessing needed, just logic.
Basic Rules
- The board is 9×9, divided into nine 3×3 boxes.
- Each row must contain the digits 1–9 exactly once.
- Each column must contain the digits 1–9 exactly once.
- Each 3×3 box must contain the digits 1–9 exactly once.
- Use logic to eliminate possibilities — pencil marks help.
Grid illustration placeholder (rows, columns & 3×3 boxes)
Controls & Tips
- Pencil mode: add small candidate notes (1–9) before committing.
- Highlights: selected row/column/box help you focus.
- Conflict alerts: duplicates are flagged to prevent errors.
- Keyboard: type 1–9; use arrow keys to navigate cells.
Win Condition
All 81 cells are filled correctly with no conflicts. You can press “Check” or rely on logic until the board is complete.
Start Playing
Ready to try? Jump into the 9×9 grid or explore daily and difficulty-based puzzles.