Pure logic, zero math. Fill every row, column, and box with 1-9 across five difficulty levels — from gentle warm-ups to diabolically evil grids.
A fresh puzzle every morning — difficulty rotates through the week (easy Monday, evil Saturday). Build your streak and sharpen your logic!
From relaxing solves to mind-bending logic chains
Plenty of given numbers and straightforward logic. Perfect for learning sudoku basics or a quick relaxing solve.
Fewer givens, requiring scanning and basic elimination. The sweet spot between relaxing and challenging — our most-played level.
Pencil marks become essential. You'll need Naked Pairs, Pointing Pairs, and Box/Line Reduction to crack these grids.
X-Wing, Swordfish, and complex elimination chains. These puzzles demand patience, precision, and advanced technique mastery.
The hardest sudoku puzzles we generate. Minimal givens, multiple advanced techniques required simultaneously. Only the brave need apply.
Fresh puzzles every day, or create your own custom challenge
A fresh puzzle every morning with rotating difficulty. Build your streak, compare solve times, and start each day with a logic workout.
Generate unlimited custom sudoku puzzles at any difficulty level. Perfect for printing, classroom use, or when you've solved everything else.
Further reading from trusted educational and reference sources