Chess Opening Theory/1. e4/1...Nf6/2. Bc4/2...Nxe4/3. Bxf7/3...Kxf7/4. Qh5

=Alekhine Defence:Krejcik Variation= Among the four legal moves, Kf6 and Ke6 aren't good options. Both moves would further expose the king.

/4...g6/ and /4...Kg8/ are playable but none of these moves can save the knight.

Theory table
'1.e4 Nf6 2.Bc4 Nxe4 3.Bxf7+ Kxf7 4.Qh5+'