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Frequently asked questions

Objective

Get answers to most frequently asked questions about Sudoku

What size of Sudokus can I create?

You can create valid Sudoku puzzles of various sizes, ranging from 4x4 mini Sudokus, up to 16x16 very large Sudokus.

How can I make the Sudokus harder for my solvers?
  • You can enable contest mode for Sudoku puzzles.More details here
  • You can disable individual assistance options. More details here
  • You can also choose a Medium or Hard difficulty level while creating a prefilled Sudoku.
  • You can create a Sudoku X.
My Sudoku file is not being accepted by your importer.

We support importing a variety of file formats for Sudokus, listed here. If you would like to import a different file format Sudoku, please reach out to us.