Hackenbush：通往超现实数新世界的窗口

Owen Maitzen's animated hour-long introduction to Hackenbush, a simple combinatorial game, and how its strategy leads to surreal numbers and the roots of the number system.

Why HN likes it: HN recommends it as an accessible, well-visualized entry point to Hackenbush, surreal numbers and their link to Nim.

“I found the following video extremely useful and well-visualized”