Chess puzzle (Advantage)
Opening: Reti_Opening, Reti_Opening_Reti_Accepted
Moves: 1. Nf3 d5 2. c4 dxc4 3. Qa4+ Nc6 4. Qxc4 Nf6 5. Nc3 e5 6. g3 Be7 7. Bg2 Be6 8.
Qb5 Rb8 9. d3 Bd6 10. O-O O-O 11. Bg5 Bd7 12. Qb3 Nd4 13. Nxd4 exd4 14. Ne4 Be7
15. Bxf6 Bxf6 16. Qa3 a6 17. Qa5 c6 18. Qd2 Be7 19. a3 *
Position (FEN): 1r1q1rk1/1p1bbppp/p1p5/8/3pN3/P2P2P1/1P1QPPBP/R4RK1 b - - 0 19
Black to move.
Themes:  Middlegame  
Puzzle rating: 1551
Best move: f5