Chess Opening Theory/1. e4/1...c6/2. d4/2...d5/3. Nc3/3...dxe4/4. Nxe4/4...Bf5/5. Ng3/5...Bg6/6. h4/6...h6/7. Nf3/7...Nd7/8. h5/8...Bh7/9. Bd3/9...Bxd3/10. Qxd3/10...e6/11. Bd2/11...Ngf6/12. O-O-O

= Caro-Kann Defence:Classical Variation = Black is able to castle in the next two moves, either with 12...Bd6 13...O-O (12...Be7 is the same, since White will play 13. Ne2 anyway), or 12...Qc7 13...O-O-O.

The main line involves kingside castling.

Theory table
.

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7 8. h5 Bh7 9. Bd3 Bxd3 10. Qxd3 e6 11. Bd2 Ngf6 12. O-O-O