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Chess Opening Theory/1. e4/1...Nf6/2. Bc4/2...Nxe4/3. Bxf7/3...Kxf7/4. Qh5
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Alekhine Defence : Krejcik Variation rd nd bd qd bd rd pd pd pd pd pd kd pd pd ql nd pl pl pl pl pl pl pl rl nl bl kl nl rl
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+'
4
...g6
=+
...Kg8
=+
Alekhine's Defence
References
Unorthodox Alekine Defense from EricShiller.com