a very special knight's tour
31:57
the natural log of imaginary numbers?
11:58
Magic Chess Tours (with Knights and Kings) - Numberphile
27:37
"infinite" arithmetic is strange
24:01
GREATEST CHESS MOVE EVER PLAYED!!!!!
21:07
on the product of all natural numbers...
18:40
The Discovery That Transformed Pi
26:19
Perfect Shapes in Higher Dimensions - Numberphile
21:25