Date added: February 4 2011
Description: Sudoku is a logic-based number-placement puzzle.
The objective is to fill a 9×9 grid so that each column, each row, and each of the nine 3×3 boxes (also called blocks or regions) contains the digits from 1 to 9 only one time each.
The puzzle setter provides a partially completed grid.
Instructions: Use your mouse and left click on a field to enter a number.