Chess Opening Theory/1. e4/1...c6/2. d4/2...d5/3. e5/3...Bf5/4. Nf3/4...e6/5. Be2/5...Bb4

=Caro-Kann Defence - Advance Variation= Black has rarely been so bold as to play 5...Bb4+, and although theory is limited, black has seen surprising success with this line. White has responded with 6. Nbd2, or, more rarely, 6.c3.

Theory table
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1.e4 c6 2.d4 d5 3.e5 Bf5 4.Nf3 e6 5.Be2 Bb4+