Obsessions

I have discovered a new obsesison--Sudoku. There's no math involved (major plus)--it's just an organizational puzzle. There are 9 boxes with 9 spaces in each box. In each box, you have to organize the numbers 1-9 without repeating any numbers. However, you also have to make sure that each column and each row has numbers 1-9 and that each one only appears once. So, 1-9 only once in each column, row, and box. It's awesome!