Chess puzzle (Advantage)
Opening: Bishops_Opening, Bishops_Opening_Berlin_Defense
Moves: 1. e4 e5 2. Bc4 Nf6 3. d3 c6 4. Nf3 d5 5. exd5 cxd5 6. Bb5+ Bd7 7. Bxd7+ Nbxd7
8. O-O Bd6 9. Re1 O-O 10. a3 Qb6 11. b4 Rfe8 12. Bb2 a5 13. c3 d4 14. cxd4 axb4
15. dxe5 bxa3 16. Bxa3 Bxe5 17. Nxe5 Nxe5 18. Nc3 Rad8 19. Re3 *
Position (FEN): 3rr1k1/1p3ppp/1q3n2/4n3/8/B1NPR3/5PPP/R2Q2K1 b - - 3 19
Black to move.
Themes:  Middlegame  
Puzzle rating: 2014
Best move: Nfg4