Download: http://archive.info-mac.org/game/backgammon-201.hqx
This is a freeware backgammon game, which features a computer opponent!
Small in size, because it's black & white; fast, not sluggish. Operates
smoothly on OS 6, 7, and 8. David Young authored this (in 1987?). Published
by Solosoft. Not easy to find. Great fun. Enjoy!