Mathematical Recreations; September 1993; Scientific American Magazine; by Ian Stewart; 3 Page(s)

Bumps the swan girl and Grimes the shepherd boy rested on the grassy slope in the spring sunshine while Fumble the sheepdog slept beneath a juniper tree. In the valley the rams ran, the swans swam and the lambs...stumbled. It was idyllic.

I'm bored, Bumps complained. "My brain is getting kind of fuzzy from all this sitting around. Why don't we play a game?"