[maxaf]

There’s “pair tennis” (I know nothing about tennis, so apologies if that’s not what it’s called) which seems to flow alright, but tennis is a much more tightly constrained activity than programming. There are only a few actions each player appears to perform, with all other actions explicitly falling out of bounds set by rules of the game.

Chess is a much wider problem domain. I can’t imagine anyone playing pair chess.

[nicoburns]

Really? You've never seen two people on a team playing chess (discussing the best move, etc)?

[rightbyte]

Each player has his own board side so you wouldn't notice.

https://en.wikipedia.org/wiki/Bughouse_chess

I assume that's what he meant.