[Event "Game with variations and sub-variations"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "?"]
[Black "?"]
[Result "*"]

{I'm the main variation header comment.} 1. e4 e5 (1... c6) (1... c5 2. Nc3 (2.
Nf3 d6)) 2. Nf3 Nc6 3. Bc4 (3. Bb5 a6 (3... Nf6) 4. Ba4 (4. Bxc6 dxc6)) *
