Game 42 in the book: a King's Knight's Opening played at Paris, August 1913, in which Alekhine has Black against J. de Rodzynski and annotates his own win.

1. 6.Ng5 Anticipating the gain of two Pawns. If at once: 6. B x P ch, Q x B; 7. Q x P, K—Q 2!; 8. Q x R, B x Kt; 9. P x B, Q x B P; 10. R—Kt 1, Q x K P ch; 11. K—Q 1, Q—B 6 ch; and Black has at least a draw, as White cannot move his K to Q B 2, on account of Kt—Kt 5 ch, etc.
2. 6…Nh6 After 7. Q x P, R—Q Kt 1; 8. Q—R 6, R—Kt 3; 9. Q—R 4, B—K 2; followed by Castles, Black would obtain a sufficient compensation in development in exchange for the Pawn sacrificed.
3. 9…Kd7 The sacrifice of the Exchange is entirely sound and yields Black a strong counter-attack.
4. 11.f3 Evidently forced.
5. 11…Bxf3 By this unexpected combination Black secures the advantage in any event. Incorrect would be, however, 10. ....Kt—Q 5; because of 11. P—Q 3, Q x Q P; 12. P x Kt, B x P; 13. Kt—B 3!, etc.
6. 13.d3 This move loses at once. The only chance was perhaps: 13. P x Kt, with the following variation: 13. ....Q x B ch; 14. K—K 2, Q x R; 15. P—Q 5, Q x R P ch; 16. K—Q 3, Q—Kt 8!; 17. Q—B 6 ch, K—Q 1, etc., but Black's position is manifestly superior.
7. 14…Be7 On this move White has the choice between the loss of the Queen or mate. He prefers the latter.