The Alapin Opening is a uncommon opening. It goes like this: 1.e4 e5 2.Ne2. Seymon Alapin used this opening the most so thats why its named after him. Ne2 blocks the bishop on f1 making it seem weird. White's point is to advance his f pawn to f5. The opening makes white have slow development and that is when black gets a good game. When you underestimate it though you could lose to it since psychological underestimation is not good. Feel free to comment and edit.