Sudoku (数独) is a logic-based, combinatoria number-placement puzzle. The aim is to fill a 9×9 grid with digits so that each column, each row and each of the nine 3×3 sub-grids that compose the grid (also called "boxes", "blocks", etc) contains all of the digits from 1 to 9. The puzzle-setter provides a partially completed grid (as seen above), which typically has a unique solution.
Don't worry if only part of the image shows here - just click on the image of the puzzle and it will open full-size, then you can print it...
If you need help on how to solve a sudoku puzzle, here is a useful site http://www.instructables.com/id/Solve-Sudoku-Without-even-thinking!
Good luck!
...and be warned... once you begin...
it becomes addictive !
