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Click on some of the clue buttons above to begin
Clue Sudoku is a new way to enjoy this very popular puzzle. For the beginner there is the guarantee that you will never reach a dead end as you can always ask for another clue. For the more experienced solver there is the opportunity to choose exactly where the clues (seeds) are placed to give the best possible chance of solving the puzzle.


Fill the 9x9 grid so that each column, each row, and each of the nine 3x3 boxes contains the digits from 1 to 9, only one time each.
Decide how many clues you will need and in which positions they should be. Your score is calculated as the number of digits you have correctly positioned minus the number of mistakes you have made and clues you have taken. Claim a Transum Trophy for completing the puzzle with a positive score.
Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for those learning Mathematics anywhere in the world. Click here to enter your comments.