Lesson
White to move. Main line: 1. e4 e5 2. f4 exf4 3. Nf3 d5 4. exd5 Bd6 5. Nc3 Ne7 6. d4 O-O 7. Bd3 Nd7 8. O-O h6 9. Ne4 Nxd5 10. c4 Ne3 11. Bxe3 fxe3 12. c5 Be7 13. Bc2 Re8 14. Qd3 e2 15. Nd6 Nf8 16. Nxf7 exf1=Q+ 17. Rxf1 Bf5 18. Qxf5 Qd7 19. Qf4 Bf6 20. N3e5 Qe7 21. Bb3 Bxe5 22. Nxe5+ Kh7 23. Qe4+
Spassky accepts an isolated and exposed kingside in exchange for open lines. After 10.c4 and 11.Bxe3, the center remains fluid and Black’s advanced e-pawn looks dangerous, but White’s pieces are ready to attack.
The knight sacrifice 15.Nd6! and 16.Nxf7 tear open the king. Black promotes on f1 with check, yet 17.Rxf1 clears the rook into play and White’s queen enters on f5. Material cannot compensate for the lack of defenders.
The final maneuver N3e5, Bb3 and Qe4+ coordinates every white piece against the king. The game is a practical guide to gambit play: open lines are valuable only when development converts them into forcing moves before the opponent consolidates.