The Rossolimo variation starts after 1 e4 c5 2Nf3 Nc6 3Bb5
one of the key points is to accelerate white's development. White typically plays 0-0 and starts to occupy the center. Hikaru picked 3..d6 which is less common than 3..g6 or 3..e6. Maybe he wanted to avoid Anand's prep.
And here is the position they reached after 20 Qc3! attacking f6.
White has achieved a winning position in 20 moves.
Knights cannot be captured.
If Black tries 20..exf5 21 ef5+ Kd7 22 Nf6+ Kc7 23 Qa5 Checkmate
If Black tries 20..exd5 21 exd5+ Kd7 22 dc6+ Rc6 23 Qd4! with checkmate threats.
If 20..e5 to stop Nf6+ then 21 Qa3! and c4-c5 will open up lines for White's attack.
Hikaru played 20..Rh6 but giving up the exchange did not work out.
Full game replay with annotations .
Great example where Anand quickly built pressure againt Nakamura using 3Bb5 against the sicilian





1. e4 c5 2. Nf3 Nc6 3. Nc3 g6 4. d4 cxd4 5. Nxd4 Bg7 6. Be3 Nf6 7. Bc4 O-O 8.
Bb3 Re8 9. f4 d6 10. Qf3 Bd7 11. O-O Ng4 12. Nxc6 bxc6 13. Bd2 d5 14. f5 Ne5
15. Qf2 e6 16. f6 Ng4 17. Qf3 Qxf6 18. Qxg4 Qd4+ 19. Rf2 f5 20. Qf3 fxe4 21.
Qf7+ Kh8 22. Qxd7 Rad8 23. Qxc6 Rf8 24. Be1 Qe3 25. Qxe6 Bd4 26. Nxd5 Qe2 27.
Qe5+ 1-0













