This is 1.e4 c6 2.Nf3 d5 3.Nc3, played by Bobby Fischer in his youth. White gets rapid development and has options with the d-pawn. Black's logical and probably best reply is 3...Bg4. After 4.h3 Bxf3 5.Qxf3, the positional continuation, Black has the option of 5...Nf6 or 5...e6. 4...Bh5 is a complicated line, in which White can trap the bishop, though Black has much compensation.