All, Not that I've played it much, but Su Doku seems to be the flavour of the week here in London, and looks like a likely candidate for a competition. I'm a bit rushed at the moment, but I might have some time next week to attempt to knock together a test. I may attempt to golf it on my own and fail miserably and give up, so don't let this get your hopes up entirely..
If anyone can see that it's a very poor idea, let me know. Cheerio, (oh, and good work with that book, mtve) -- Jasper