Alekhine-Chartard attack

That's it (Alekhine-Chattard attack). White gambits a pawn to put strong pressure over Black's kingside : if Black takes it (6...Bxg5 7.hxg5 Qxg5), he has lost his best bishop, placed his queen at a somewhat insecure place, and above all opened the h-file, which makes castling kingside just as good as suicide.

Alekhine recommended refusing the gambit in his 200 chess games, I'm not sure of the state of the theory nowadays.

Probably equal with best play, but Black has to be careful. Rather irrelevant too, as after 4.Bg5 Black is scoring much better currently with either the McCutcheon (4...Bb4) or the Burn/Morozevich (4...de4 5.Nxe4 Be7).

I won a small tournament dedicated to this opening and one of my opponents summed it up: "I hate this opening. No matter which side I have, I feel like I'm losing!"

It's mighty sharp stuff and can blow up on you all of a sudden.

i used to play this a lot, what usually ends up happening for me is- attack, and if it fails i lose, very difficult to pull out a draw if black manages to defend (superior structure/etc.)