Chess Log: Several Short Games Showing The Risks Of Moving The F-Pawn Too Early

First, two very short games demonstrating that NOT capturing the Knight at e5 after 1. e4 e5 2. ♘f3 f6? 3. ♘xe5! will not necessarily improve things for Black:

1. e4 e5 2. ♘f3 f6 3. ♘xe5 ♗d6 4. ♕h5 ♔e7 5. ♕f7 1-0 {Black checkmated}

1. e4 e5 2. ♘f3 f6 3. ♘xe5 d6 4. ♕h5 ♔e7 5. ♕f7 1-0 {Black checkmated}

Next, a game showing that Black can also benefit when White moves the f-Pawn too early -- or actually, in this case, not Castling Queenside soon enough after the standard, by-the-book 7. f4:

1. e4 c5 2. ♘f3 d6 3. d4 cxd4 4. ♘xd4 ♘f6 5. ♘c3 a6 6. ♗g5 e6 7. f4 ♗e7 8. ♕f3 ♘bd7 9. ♗d3 e5 10. fxe5 ♘xe5 11. ♕g3 ♘h5 12. ♗xe7 ♕xe7 13. ♕e3 ♘g4 14. ♕e2 ♕h4 15. g3 ♘xg3 16. O-O-O ♘xe2 17. ♗xe2 0-1 {White resigns}