Chess puzzle (Advantage)
Opening: Nimzo-Larsen_Attack, Nimzo-Larsen_Attack_Classical_Variation
Moves: 1. b3 d5 2. Bb2 Nc6 3. e3 e5 4. Bb5 Bd6 5. f4 f6 6. fxe5 fxe5 7. Nf3 Qe7 8. O-O
Nf6 9. d4 e4 10. Ne5 Bd7 11. Nxd7 Nxd7 12. Bxc6 bxc6 13. Nc3 O-O-O 14. Qe2 Rhf8
15. Qa6+ Kb8 16. Qxc6 *
Position (FEN): 1k1r1r2/p1pnq1pp/2Qb4/3p4/3Pp3/1PN1P3/PBP3PP/R4RK1 b - - 0 16
Black to move.
Themes:  Middlegame  
Puzzle rating: 1950
Best move: Qh4