blokhead,
I can see your point of view too. I admit that I focused on:

In fact, I want to get all possible teams:

While my solution addresses the above statement in isolation, taken in context with the rest of the post it is likely lacking. For instance:

• For any given game, do all teams need to have the same number of players?
• For any given game, can a player participate in more than one team?
• For any given game, do all players need to play or can they "sit out"?

I am not sure how much of your code addresses those points either but I am pretty sure it misses how to convert a team to a "number" and its reciprocal. Any ideas on that front?

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