World's hardest sudoku: can you crack it?

Readers who spend hours grappling in vain with the Telegraph

Analysis of xx-worlds-hardest-sudoku-work.sdk

Miracle Sudoku, Viral Sudoku Video

It took three months to create, so how long will it take to crack the world's hardest Sudoku?

Hardest Sudoku, can you crack it?' Unisex Tie Dye T-Shirt

Fun Lab - World's hardest sudoku: can you crack it? On the difficulty scale by which most sudoku grids are graded, with one star signifying the simplist and five stars the hardest

EXTREME] The Hardest Sudoku Variant We've Ever Seen

It took three months to create, so how long will it take to crack the world's hardest Sudoku?

Miracle Sudoku, Viral Sudoku Video

Do you think you’re an expert at puzzles? Does your brain work in the right way to solve the things that others find impossible? Do you believe you

World's Hardest Sudoku Book: 200 of the World's Toughest Sudoku Puzzles

10 Sudoku Tips and Tricks That'll Help You Solve Faster - Mastering Sudoku

Is there a Sudoku puzzle where you can start with 1 and find all 1's, then move to 2, and so forth until 9, so that you solve the entire puzzle in

Can You Solve a 600 IQ Puzzle?