This is the puzzle that has become a world-wide phenomenon. Also known as Number Place, we have been offering these puzzles since 2002, and were very pleased to see the rest of the world catching on!


Our puzzles are carefully graded by difficulty: Easy, Moderate, Hard and Challenging. (We can also generate Extra Easy puzzles that are suitable for younger solvers.) All puzzles are rigorously tested to ensure that they have exactly one solution, which can be deduced by logic alone (no guessing is required.)

We provide puzzles and solutions in print-ready format (EPS, or Encapsulated Post-Script) as well as machine-readable format (XML), and can provide custom content and format as required.

For a free daily puzzle, visit our associates at

Feel free to download our Sudoku Sampler or contact us with your requirements.