The Author is not responsible for any contents linked or referred to from his pages - unless he has full knowlegde of illegal contents and would be able to prevent the visitors of his site from viewing those pages. If any damage occurs by the use of information presented there, only the author of the respective pages might be liable, not the one who has linked to these pages.
The idea of the Sudoku game is free. However, the problems generated by the program are subject to copyright. Nevertheless, both the generated problems and the printouts may be distributed amongst friends, every other utilization - in particular commercial utilization - requires my explicit written approval. Also the content of this website (text and pictures) is my intellectual property, from this follows that each and every usage is not allowed and must be explicitly permitted by me. And last but not least: The distribution of the program in software collections either online or offline (e.g., on CD-Rom) is not permitted and requires my explicit written approval!