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.

Play Kiplinger Sudoku for free every day. Try this easy Sudoku puzzle or if you fancy more of a challenge there's a hard Sudoku to tackle. There's a new easy Sudoku to play every day.

Here's where you can find sudoku on your iPhone and what to know about the game. 2. Tap Following across the bottom of your screen.

The best Sudoku tips to solve any puzzle. Unlike, say, Wordle and Connections, Sudoku puzzles tend to come labeled by their degree of difficulty.Regardless of how easy or hard the puzzle is, all ...

Introducing Sudoku Puzzle Packs! Challenge your intellect by using your wits and skill to master Sudoku. Whether this is your first time playing Sudoku or if you're an experienced master, choose ...

Get started solving the classic number puzzle with tips from some of the best solvers in the world. By Isaac Aronow Everybody can solve a hard Sudoku. Maybe not right now, maybe not without some ...

With NP-complete problems you could discover a fast algorithm to solve Sudoku puzzles that could also break the encryption schemes that protect our digital economy.

On a mid-October Monday, shortly before 9 a.m., 179 elite puzzlers made their way into the ballroom of a Toronto hotel and found their allocated seats for the World Sudoku and Puzzle Championships.