Chess Opening Theory/1. e4/1...c6/2. d4/2...d5/3. e5/3...Bf5/4. Nf3/4...e6/5. Be2/5...Nd7/6. O-O/6...Ne7/7. Nh4/7...Bg6/8. Nd2/8...c5/9. c3/9...Nc6

= Caro-Kann Advance Variation = White's h4-knight is under attack, making /10. Nxg6/ the most natural move.

Theory table
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1.e4 c6 2.d4 d5 3.e5 Bf5 4. Nf3 e6 5. Be2 Nd7 6. O-O Ne7 7. Nh4 Bg6 8. Nd2 c5 9. c3 Nc6