Welcome to our free impossible sudoku games. Fill in each square with a number, making sure no number repeats in each column or row. Check back every Sunday for a new puzzle or explore ones we ...

Mathematicians have uncovered a powerful pattern known as the 'Phistomefel Ring' - and it's hidden in every Sudoku ever made. Best of all, puzzle experts say the pattern could help you solve ...

Find answers to the latest online sudoku and crossword puzzles that were published in USA TODAY Network's local newspapers.

The winner will receive a Visa gift card for $1,000, a Crossword tote bag, a book and pencil set, plus a signed ...