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.
Copyright 2006 - Antonio Zamora
Sometimes sudoku is misspelled as sudogo, sudogu, or sudoko.
