So you have heard about Sudoku but you don't know how to start. The rules are elegantly simple, the numbers 1 to 9 must appear once, and once only:
Then perhaps you should dive right into today's easy or medium puzzles. If you really want a challenge (go on, you know you do) then give the extreme class a shot. Take care, they are not for the faint of heart.
It happens to the best of us from time to time. The smart playrs use the techniques that are described in the solving library. The really smart ones use the sudoku dictionary, so that they understand what's being discussed in the rest of the sudoku world.