my new addiction

One of the gifts my wife was given after an operation she had was a book of Sudoku puzzles. The object is to fill in the squares with numbers 1-9 so that each row has only 1-9, each column has only 1-9 and each box has only 1-9. No row, column, or box can have a repeated number. It's great. We both sit on our back patio and see who can finish first.

To play them online go here. Have fun!