First one-player Pong variant?

[Phosphor Dot Fossils]

OK, old-school buffs. Here's a poser for ya: what was the first version of Pong, either one of the arcade ripoffs or home consoles or even Video Olympics, to add an AI opponent for single-player games? I'm almost thinking it is Video Olympics for the 2600, but I wanted to make sure, as I'm not that familiar with all of the coin-op variants.

Any help here from the scholars? :D

[soupforare]

hm, when did BLIP, the mechanical pong clone come out?

I've got one, and it will do one-player. ;P