411 REFERENCE · Wikibooks
Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bc4/3...Nf6/4. d4/4...exd4/5. O-O/5...Nxe4/6. Nc3/6...dxc3/7. Bxf7/7...Kxf7/8. Qd5/8...Kf6/9. Re1/9...Ne7/10. Qxe4
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Nakhmanson Gambit rd bd qd bd rd pd pd pd pd nd pd pd kd ql pd nl pl pl pl pl pl pl rl bl rl kl
Nakhmanson Gambit, Kf6 Defence, Rook Attack
10. Qxe4
In the analogous position with a knight on c6 and a bishop on e7, Black needs to play 10…d5 to avoid a draw by repetition. Here 10…d5 would be inaccurate, but not immediately fatal: 11.Qf4+ forces Black to self-pin with 11…Bf5 (11…Nf5?? 12.Qg5+) and then White has a pleasant choice between g4 and Nd4 to exploit the pin.
Black preserves the piece and the advantage by simply running away with 10...Kf7. Now that the e7-knight covers d5 and f5, the king can hide on g8 without getting checkmated by a queen on d5, which is always a plus.