411 REFERENCE · Wikibooks
Chess Opening Theory/1. e4/1...Nf6/2. Bc4/2...Nxe4/3. Bxf7/3...Kxf7/4. Qh5/4...Kg8/5. Qd5/5...e6
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Alekhine Defence: Krejcik Variation rd nd bd qd bd kd rd pd pd pd pd pd pd pd ql nd pl pl pl pl pl pl pl rl nl bl kl nl rl
This is the only legal move. When black loses their extra piece, they would have lost the right to castle but would have the bishop pair.
Alekhine's Defence