411 REFERENCE · Wikibooks
Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nf6/3. Nxe5/3...d6/4. Nxf7/4...Kxf7/5. d4/5...Nxe4
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Cochrane Gambit rd nd bd qd bd rd pd pd pd kd pd pd pd pl nd pl pl pl pl pl pl rl nl bl ql kl bl rl Petrov's Defence
5...Nxe4
This is a grave mistake, allowing White to win back the piece. Other moves were better. Lakdawala, Cyrus. The Petroff, Move by Move. Gloucester Publishers Limited, 2015
Petrov's Defence
References