Re: "Ultimate" Sudoku Challenge

Mark J. Tilford said:

> And it appears that using a 2 where the 8 goes on the eighth row will
> force a unique solution.
> 462139578
> 138572469

Cooked, by heaven!

Well done. I hadn't thought of that. On reflection, I like the other
explanation of my puzzle better than I like my own - and you just gave me
another reason to do so.

--
Richard Heathfield
"Usenet is a strange place" - dmr 29/7/1999
http://www.cpax.org.uk
email: rjh at above domain (but drop the www, obviously)
.

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