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.