This is a variation on classic Sudoku – note the shaded cells forming an “X” along the diagonals.  These too must also contain the digits 1 through 9 exactly once.  The extra constraint allows Sudoku-X puzzles to have fewer givens to start.   Experienced sudoku solvers find this variation fun and refreshing.

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.

Other varieties of Sudoku:

  • Classic Sudoku: The original puzzle that started the world-wide phenomenon.
  • Sudoku-6: A 6×6 puzzle that is fast and fun to solve!

Please feel free to download our samples or contact us with your requirements.