Sudoku is defined by Merriam-Webster as a 9-by-9 grid puzzle in which the grid is divided into 3-by-3 boxes. Every row, column and box must contain the numbers one through nine, no repeats.

Unlimited puzzles, hints and reveals across Crossword, Quick Cross and Sudoku Additional games, like the brand new 7 Little Words The crossword archive, filled with hundreds of past puzzles for ...

"Sudoku is a puzzle with pure logic," Shortz says about the American invention. "It has a grid of 9-by-9 divided into nine 3-by-3 boxes. The object is to put the numbers into each box, row and ...

Thomas Snyder (aka Dr. Sudoku) is a three-time World Sudoku Champion and five-time US Puzzle Champion, as well as the author of several books of puzzles. His puzzles are hand-crafted, with ...