|Moves: 1. e4 e5 2.Nf3 f6|
|ECO code: C40|
|Parent: King's Knight Opening|
White may take the pawn with 3.Nxe5 because retaking with 3...fxe5 would result in either the loss of a rook after 4. Qh5+ g6 5. Qxe5+ Qe7 6. Qxh8 or an irresistible attack after 4...Ke7 5.Qxe5+ Kf7 6.Bc4+ (the rest of White's pieces come out with gain of time) d5! (best. If simply 6...Kg6 7.Qf5+ Kh6 8.d4+ g5 9.h4 Black is getting mated) 7.Bxd5+ Kg6 8.Bxb7! again winning a rook because if 8...Bxb7 then 9.Qf5+, with a similar line as to above.
The only chance for Black after 3.Nxe5 that does not lose immediately is 3...Qe7, but White has a large advantage after 4.Nf3 Qxe4+ 5.Be2 because of his large lead in development.
1. e4 e5 2. Nf3 f6
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- Batsford Chess Openings 2 (1989, 1994). Garry Kasparov, Raymond Keene. ISBN 0-8050-3409-9.