Chess puzzle (Advantage)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Other_variations
Moves: 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. c5 b6 6. b4 a5 7. a3 axb4 8. axb4
Bb7 9. e3 h6 10. Bxf6 Bxf6 11. Bb5+ c6 12. Bd3 O-O 13. f4 Nd7 14. Nf3 bxc5 15.
bxc5 Nxc5 16. Bc2 Ba6 17. Kf2 Nd7 *
Position (FEN): r2q1rk1/3n1pp1/b1p1pb1p/3p4/3P1P2/2N1PN2/2B2KPP/R2Q3R w - - 4 18
White to move.
Themes:  Middlegame  
Puzzle rating: 1779
Best move: Rxa6