http://sudoku.koalog.com

Our services

Sudokus creation

A sudoku
generated by Koalog
We create original Sudokus for websites, newspapers and books. Each Sudoku comes with its unique solution, a difficulty level and, if required, a human understandable explanation. Note that we can create smaller Sudokus (4x4), bigger ones (16x16, 25x25, ...) and Sudokus with additional constraints or patterns.

Delivery

We deliver our Sudokus electronically in various formats (PDF, EPS, GIF and many others), depending on your needs.

References

See our references list and contact us for a quote.

About our Sudokus

Unicity of solution

We guarantee that each Sudoku has a unique solution.

Difficulty levels

We rank our Sudokus with 6 levels of difficulty depending on the complexity of the rules needed to solve them, the last level may require trial-and-error.

Minimal indications

Unlike other Sudokus providers, we guarantee that it is not possible to reduce the set of indications (aka givens) while maintaining the unicity of the solution.