Sudoku
A new daily puzzle every day. Three difficulty levels. Notes mode included.
About
Daily Sudoku — Same Puzzle for Everyone
Each day a new puzzle is generated for Easy, Medium, and Hard difficulty. The seed is based on today's date, so every player gets the same puzzle — making it easy to compare times with friends.
Use Notes mode to pencil in candidates, arrow keys to navigate, and the number pad (or keyboard) to fill cells. Conflicts are highlighted in red automatically.
Daily Puzzle
New puzzle every day, seeded by date. Same for all players.
Notes Mode
Pencil candidate numbers into cells without committing.
Conflict Highlight
Duplicate numbers in the same row, column, or box turn red instantly.
Timer
Track how long each puzzle takes and improve your personal best.
How to Play
Sudoku Rules
Select a cell
Click or tap any empty cell to select it. The row, column, and 3×3 box highlight automatically.
Enter a number
Click a number on the pad (or press 1–9 on your keyboard). Use Notes mode to pencil in candidates.
Solve the grid
Fill every cell so each row, column, and box contains 1–9 exactly once. Conflicts highlight in red.
FAQ
Frequently Asked Questions
How do I play Sudoku?
Fill the 9×9 grid so every row, column, and 3×3 box contains digits 1–9 exactly once. Select a cell, then enter a number.
Does the puzzle change every day?
Yes. A new puzzle is generated daily for each difficulty. The seed is based on today's date, so everyone gets the same puzzle.
What are the difficulty levels?
Easy (38 clues), Medium (30 clues), Hard (24 clues). Fewer clues = harder puzzle.
What is Notes mode?
Notes lets you write small candidate numbers inside a cell. Useful for advanced solving techniques like naked pairs and hidden singles.