A Japense puzzle
that can be solved through logic and reasoning. It is a 9x9 square broken up into 3x3 regions and each region, row, and column must all have 1-9 within them. A number cannot be repeated within a region, row, or column; or it will not work. There is usuly about 27 of the 81 numbers given to you to get you started. The abundancey of how many of each number and where those number are placed, creates the difficulty of the puzzle.
Sudoku is very, very, very addicting and challenging and also mentaly healthy, but not as healthy as sex!!!