Comment by ColinWright

Can you be a little more specific about what you need more details on? I'd be happy to write a little more, put some extra links or text boxes to clarify, but I'm not sure what people need explaining.

Does this help?

http://www.solipsys.co.uk/new/GraphThreeColouring.html?HN2

Feel free to email if you'd prefer, I'll go and start reviewing it.

Thanks!

Edit: I've now added a side-box with that link.