Click o the pe butto, the left-click o a square ad drag the cursor up ad dow to eter your "pe" aswer. You ca also type i the umber. If you're ot sure of a aswer, you ca select the pecil butto istead. Mouse over a square ad click o the umber(s) you wat to eter.

Use simple logic to fill in the puzzle's nine rows and nine columns with numerals 1-9. Each number can only be used once in a given row or column. Enter the correct number in every grid square to win! Sudoku has two modes: Pen and Pencil.