the crypdoku puzzle style was invented on 14 february 2006 as a variation of the sudoku puzzle that has swept the world
a crypdoku is a type of sudoku puzzle in which the numbers encrypt a hidden message of up to 9 characters
"the crypdoku puzzle style was invented on 14 february 2006 as a variation of the sudoku puzzle that has swept the world" What is the definition of "crypdoku"?