Okay, so the tough one is your chance to beat me.  My time wasn't
good.  I found the puzzle on a Sudoku forum out in internet land.  
Someone was suggesting that it could be solved by pure logic without
recourse to guesses.  I was desperate to find the logical method,
especially since at the start it looks deceptively simple.  Alas to no
avail.  If you solve it purely from logic, e-mail me and let me know how.

Ultra Tough Sudoku No 1

Challenge Time                40 minutes
Duncan's Time                 29 minutes

(If you beat my time feel free to
e-mail me and rub it in!)

















This puzzle comes from busstoptoyshop.com