Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Hyperaccelerated_Fianchetto
Moves: 1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Bg7 5. b3 Nc6 6. Bb2 Qb6 7. c3 Nxd4 8.
cxd4 Nf6 9. e5 Nd5 10. Bc4 Nf4 11. O-O d5 12. exd6 Qxd6 13. Na3 O-O 14. Nb5 Qf6
15. Rb1 Qg5 16. Qf3 Bg4 17. Qg3 h5 18. Bc1 e5 19. Bxf4 *
Position (FEN): r4rk1/pp3pb1/6p1/1N2p1qp/2BP1Bb1/1P4Q1/P4PPP/1R3RK1 b - - 0 19
Black to move.
Themes:  Middlegame  
Puzzle rating: 1241
Best move: exf4