Fill 1 to 9 in the grid so that every row every column every 3by 3box contain the digits 1 through 9. It is amazing that all the number from 1 to 9 will provide a into the maze. And they will fit the boxes perfectly! Perfect Sudoku is a Puzzle game, available on www.t45ol.com, for totally free and for your spare time relaxing and entertainment. Good luck! And have fun.