Sudoku
Classic logic puzzle. Fill the 9x9 grid.
Mistakes: 0/3 Time: 00:00
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You Won!
Congratulations! You solved the puzzle.
How to Play
- 1 Fill the 9x9 grid so that each row, column, and 3x3 box contains all digits from 1 to 9.
- 2 Click a cell to select it, then click a number button below to fill it.
- 3 Blue numbers are your entries; black numbers are preset.
- 4 Mistakes will turn red and be counted. Try to keep them low!
- 5 You can also use keyboard numbers 1–9.
Who is this for?
- Logic puzzle lovers who enjoy methodical problem-solving
- Anyone looking to improve short-term memory and focus
- Users seeking a peaceful way to de-stress through mental activity
Best moments to play
- Morning routine to kickstart your logical thinking
- During commutes or breaks to keep the mind sharp
- Before bed to disconnect from digital noise with a pure puzzle
Player tips
1
Scanning Method
Look for rows or columns with the most numbers already filled.
2
Box Elimination
Use the 3x3 sub-grids to narrow down where a number MUST go.
3
Patience is Key
Never guess. Every move in Sudoku can be justified by pure logic.
Fun observations
Not Math
"Sudoku is about pattern recognition and logic, not arithmetic."
Mindful Focus
"Engaging with the grid can induce a meditative "flow" state."
Brain Fitness
"Regular practice strengthens executive function and categorical thinking."
Need another challenge?
Try the word-based Wordle or the spatial logic of Nonogram.