There is a long and worthy tradition on the Internet of putting up great stuff for
free. It is in that spirit that I have hosted and developed my step-by-step solver since 2005. It has been great fun and I have had many useful contributions and suggestions that keep it leading-edge.
It does generate a great deal of traffic however and I want to minimise clutter from advertisements. sudokuwiki.org is hosted on its own server with all the website projects I maintain. If you would like to help with the server hosting costs the donate button on the right will take you through the secure Paypal process.
My paypal address is firstname.lastname@example.org
Many thanks if you have donated !