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

= Caro-Kann Defence:Classical Variation =

8. h5 is mostly played, aiming to tie up black's kingside pawns. The pawn on h5 is double-edged. It's powerfully positioned in black's territory, but it also requires protection from the knight on g3, making this potentially a bad piece.

Theory table
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1.e4 c6 2.d4 d5 3.Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7