Index

Instructions:
1) Click "Play Sudoku"
2) Select degree of difficulty (easy, medium, hard)
3) On the leftmost number pad, select a digit by typing a number or by clicking on the pad,
4) then click on an empty square on the puzzle to set the number.

A sudoku puzzle usually consists of a nine-by-nine grid. Some of the spaces contain numbers; the rest are blank. Your goal is to fill in the blanks with numbers from 1 to 9 so that each row, each column, and each of the nine three-by-three blocks making up the grid contains just one of each of the nine numbers.

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Sometimes sudoku is misspelled as sudogo, sudogu, or sudoko.