All Sudokion® puzzles appearing in and available from this website are the Copyright © 2015 of Praxis Professional Services Pty Limited.

Sudokion® is the registered trade mark of Stephen Jones & Michele Day.

Sudokion® design, creation, development – Muddled Puzzles.

Sudokion® technical development – Adam Cheong.

Web development – Tracey Kemp.

Public relations – Pybus PR.