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Sudoku generator
Press New puzzle for as many sudoku as you like, from Gentle (45 clues) to Expert (24). Each one is made in your browser and checked before it appears: if a puzzle could be finished two ways, it is thrown away and another is made. Show the answer adds the answer key, to print with it or not.
The puzzle number brings the same sudoku back, so a class can all print number 12345. Ready-made sheets are on the printable sudoku page.
Level
For children
Read the guide: What makes a sudoku hard? We tested 500 puzzles.