Our puzzles are carefully graded by difficulty: Easy, Moderate, Hard and Challenging.
Most puzzles are 13x13 but we can generate a variety of sizes from 7x7
up to 31 x 31. The grids are symmetrical (180 degree rotation.)
All puzzles are rigorously tested to ensure that they have exactly one solution,
which can be deduced by logic alone.
Local trial-and-error may be necessary.
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.
Please feel free to download our samples
or contact us with your requirements.
You can find our kakuro puzzles at
and in USA Today publications.
They are also featured in The Puzzle Society
and available for Palm mobile devices.