Deep Blue's Knockout
Deep Blue vs Garry Kasparov. IBM rematch, New York, game 6, 1997.
A known sacrifice can be deadly: opening theory is knowledge, and knowledge is strength.
The moves
1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 5. Ng5 Ngf6 6. Bd3 e6 7. N1f3 h6 8. Nxe6 Qe7 9. O-O fxe6 10. Bg6+ Kd8 11. Bf4 b5 12. a4 Bb7 13. Re1 Nd5 14. Bg3 Kc8 15. axb5 cxb5 16. Qd3 Bc6 17. Bf5 exf5 18. Rxe7 Bxe7 19. c4