Sudoku

These Sudoku things drive me mad. They are everywhere now. Who invented them? I wish I'd thought of it, I might be rich by now. It took me weeks to actually complete one of the 'gentle' ones. I got fed up and gave up before I finished (cos obviously I could, if I wanted to!). But then, on Monday I completed the HARD level on Yahoo! Sudoku (http://www.nonzero.it/yahoouk/). Well, sort of. I was having a Sudoku race with my friend Kirstie, but neither of us could take the pressure and made mistakes. Which is REALLY annoying because then you have to start again. Except I didn't. I just clicked 'View Solution' to find the wrong ones. Does that make me a cheater?