[Event "Casual game"]
[Site "http://lichess.org/analyse/9zak4ln7"]
[Date "2013-03-18"]
[White "Anonymous"]
[Black "Anonymous"]
[Result "*"]
[WhiteElo "?"]
[BlackElo "?"]
[PlyCount "7"]
[Variant "Standard"]

1. e4 e5 2. f4 Nf6 3. fxe5 Nxe4 4. Nf3