Thanks for looking you are correct that the links are dead.
but as you seem interested I have put together a link so you can see the
rules. (note that some of the links across the top are not working)
This was a site that was shelved and I never got round to finishing.
I have hosted it on another site I own.
please leave comments or send me an email,
I would love to hear what you think.
http://www.sudokuevolution.com/chess/rules.php