This might have been answered elsewhere, and people alluded to it in previous posts, but...
What is the earliest turn in which a game can end? Assume no one quits.
For the sake of discussion, let there be "half turns". I.e. turn 1.0 would be {player 1 does actions, buys, cleans up, etc.}; turn 1.5 would be player 2 does that stuff; turn 2.0 is player 1 doe that stuff; and so on (yes, even though I'm a computer scientist, I'm starting counting at 1, not 0).
Shenanigans (Bakers, Nomad Camp, Black Market, Bane cards, etc.) are allowed.
Does this have anything to do with Celestial Chameleon?
Celestial Chameleon can end the game before it has even begun.
------------ Game Setup ------------
Supply cards: King's Court, Goons, Haggler, Watchtower, Nomad Camp, Fortress, Procession, Catacombs, Hamlet, Black Market
Rating system: pro
Celestial Chameleon - starting cards: Estate, Estate, Estate, Copper, Copper, Copper, Copper, Copper, Copper, Copper
ephesos - starting cards: Estate, Estate, Estate, Copper, Copper, Copper, Copper, Copper, Copper, Copper
Celestial Chameleon - shuffles deck
ephesos - shuffles deck
Celestial Chameleon - draws Copper, Copper, Copper, Copper, Estate
ephesos - draws Copper, Estate, Copper, Copper, Copper
------------ Game Over ------------
Celestial Chameleon - cards: 7 Copper, 3 Estate
Celestial Chameleon - total victory points: 3
Celestial Chameleon - turns: 0
ephesos - resigned
ephesos - cards: 7 Copper, 3 Estate
ephesos - total victory points: 3
ephesos - turns: 0
1st place: Celestial Chameleon
2nd place: ephesos