A great YouTube video: The Unbeatable Game from the 60s: Dr NIM
The game of (single pile) Nim can be won by anyone who understands a simple trick. A trick so easy, a 1960s mechanical plastic computer can play with perfect strategy, defeating all humans.
Learn the method and proceed to beat your friends, family and colleagues.
Read more about single-pile Nim on the Maths Busking site:
My Domino Computer. The Domputer.
Dr NIM at the Computer History Museum:
And someone has put the whole instruction booklet online:
MATT PARKER: Stand-up Mathematician
Music by Howard Carter
Design by Simon Wright