Complete a whopper 16x16 puzzle in 85 minutes or less

Test your skills against some of the most difficult puzzles ever devised

If you find yourself breezing through most Sudokus without breaking a sweat, then this guide is for you. You'll find some of the trickiest, most demanding puzzles ever published, including several unusual variations. If you're up for a challenge, pick up your pencil and prepare to be perplexed!

Discover how to:



Solve super-tough 9x9 puzzles


Defeat 12x12 puzzles


Triumph over 16x16 puzzles


Vanquish jigsaw Sudoku


Master circular puzzles