Wait... how did he solve that extreme sudoku?
14:47
This puzzle is a real gas!
31:50
Mensa Sudoku
19:46
These 2 Tricks Can Solve Most Of The World’s Hardest Sudokus
18:52
Solve this puzzle one step at a time, but be sure to skip a step!
24:44
Sudoku classique, par Kumaresan (grille difficile)
17:59
Techniques for Hard Sudoku
3:19
The puzzle with a whole HOUSE full of lies
15:24