Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Chigorin_Variation
Moves: 1. d4 d5 2. Nf3 Nc6 3. Bf4 Bf5 4. e3 Nf6 5. c3 a6 6. Nbd2 e6 7. Qb3 Rb8 8. Be2
Ne4 9. Nxe4 Bxe4 10. O-O Bd6 11. Bxd6 cxd6 12. Nd2 Bg6 13. c4 dxc4 14. Nxc4 d5
15. Nd2 b5 16. Rac1 Qd6 17. a4 Na5 18. Qa2 bxa4 *
Position (FEN): 1r2k2r/5ppp/p2qp1b1/n2p4/p2P4/4P3/QP1NBPPP/2R2RK1 w k - 0 19
White to move.
Themes:  Middlegame  
Puzzle rating: 1083
Best move: Qxa4+