Chess puzzle (Advantage)
Opening: French_Defense, French_Defense_Normal_Variation
Moves: 1. e4 e6 2. d4 Bb4+ 3. c3 Ba5 4. Bf4 Ne7 5. Nf3 O-O 6. Bd3 Nbc6 7. Nbd2 f6 8.
Nb3 Bb6 9. Bc4 d5 10. exd5 exd5 11. Bd3 Bf5 12. Bxf5 Nxf5 13. Qc2 Re8+ 14. Kf1
Qd7 15. a4 a6 16. a5 Ba7 17. Re1 Rxe1+ 18. Kxe1 Re8+ 19. Kd2 Nxa5 *
Position (FEN): 4r1k1/bppq2pp/p4p2/n2p1n2/3P1B2/1NP2N2/1PQK1PPP/7R w - - 0 20
White to move.
Themes: Hanging Piece Middlegame  
Puzzle rating: 1143
Best move: Nxa5