54:48

Just How GORGEOUS Is This Sudoku?

1:03:48

The 6x6 Miracle Sudoku

29:21

Seeking Squares in the Fog

38:49

Help me Sort out my Neighbours!

40:27

One Of The Best Sudokus In History

23:40

JEFF MILLS - L'artiste TECHNO qui a tout changé

17:01

The rarest move in chess

24:43

The Lever Paradox