Here's Marty!!! Sudoku Genius Goes Mad
1:15:45
Sudoku Legend Runs Rings Around Simon
1:33:21
Quantum Entanglement: How Complicated Can It Be?
32:54
Sudoku Snake Alert
1:18:56
The Fog Sudoku Theorem
17:01
The rarest move in chess
26:13
Why don't Jigsaw Puzzles have the correct number of pieces?
2:45:04
"One Of The Best Puzzles I Ever Solved": WARNING: VERY Hard!
32:50