Web Sudoku

I reached this link via Mathforge. What can I say, the game is addictive. My current record is 6 min for the easy game and I’ve yet to try the hard and 55 min for the evil level. Now, the very natural question is computing the total possible combinations offered by the Sudoku board and this has stumped me. The wiki page has links to work done by mathematicians on this calculation.

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