Sudoku Master
Sudoku Master brings the beloved Japanese number placement puzzle to your browser. Fill the 9x9 grid so every row, column, and 3x3 block contains every digit from 1 through 9. Features dynamic conflict alerts, pencil candidate notation, timer, and hints.
How to Play
- Select any blank square on the 9x9 matrix.
- Press numbers 1-9 on your keyboard or tap the on-screen keypad to place a digit.
- Activate Pencil Notes mode to annotate possible candidate digits inside a cell without committing.
- Fill all 81 squares accurately without repeating numbers in any row, column, or 3x3 box.
Rules
- Each horizontal row must contain digits 1-9 with no duplicates.
- Each vertical column must contain digits 1-9 with no duplicates.
- Each 3x3 sub-grid outline must contain digits 1-9 with no duplicates.
- Initial clue numbers are permanently fixed and cannot be erased or modified.
Frequently Asked Questions
Does Sudoku require mathematical calculations?No arithmetic calculation is required. Sudoku is purely a game of logical deduction and pattern elimination.
What do the four difficulty tiers mean?Easy puzzles offer numerous starter clues for quick deduction. Medium and Hard require intersection elimination. Expert puzzles demand advanced candidate cross-referencing.
How does the Hint feature work?The Hint button reveals the correct number for an unsolved square, adding a small 20-second time penalty to maintain scoring integrity.
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