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
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Nakhmanson Gambit rd bd qd bd rd pd pd pd pd kd pd pd nd nd pd nl pl pl pl pl pl pl rl bl ql rl kl
Nakhmanson Gambit
7...Kxf7
The tactical point behind sacrificing the bishop on f7 is that White now has 8. Qd5+, regaining the piece (or one of the pieces, at least).