Chess Opening Theory/1. e4/1...c6/2. d4/2...d5/3. e5/3...Bf5/4. Nf3/4...e6

=Caro-Kann Defence - Advance Variation= White seemingly has a large number of choices here, although 5.Be2 is most commonly played. 5.a3 and 5.c3 are two reasonable alternatives - none of the others have given white much success.

Theory table
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1.e4 c6 2.d4 d5 3.e5 Bf5 4.Nf3 e6