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. Qxe4/10...Kf7/11. Bg5/11...d5
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Nakhmanson Gambit rd bd qd bd rd pd pd pd nd kd pd pd pd bl ql pd nl pl pl pl pl pl pl rl rl kl
Nakhmanson Gambit, Kf6 Defence, Rook Attack
11...d5
Black is threatening to unpin the knight with ...Qd7 or ...Qd6. White's hopes of capturing the knight rest on immediately driving off one of its three defenders, while keeping three attackers on it (so, not blocking the rook with Ne5+). The only move that accomplishes this is 12. Qf4+, intending Qh4.