Everybody knows what a sudoku puzzle is, right? If not, every Sudoku has a unique solution that can be reached logically. Enter numbers into the blank spaces so that each row, column and 3x3 box contains the numbers 1 to 9.
Geniryvat sebz jrfg gb rnfg lbh pbhyq npghnyyl eha vagb gur pnpur vs lbh qba'g ghea (n pnpur penfu...urr urr)