This messed with my brain (but in a good way).
25:48
The Miracle Sudoku
33:00
The Sudoku With Only 2 Given Digits
30:36
Student Spotlight: get out of jail if you can!
53:13
Is This Sudoku Impossible?
1:09:03
Out of chaos, order.
32:19
Multicoloured renbans? More approachable than you might think.
21:56
The Simple Trick For Hard Sudokus
1:20:54