Chess puzzle (Advantage)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Marshall_Defense
Moves: 1. d4 d5 2. c4 Nf6 3. Nf3 Bf5 4. Bf4 e6 5. e3 Bb4+ 6. Nc3 O-O 7. Qb3 Bd6 8.
Bxd6 cxd6 9. cxd5 exd5 10. Be2 Nc6 11. O-O Na5 12. Qb4 a6 13. h3 Qd7 *
Position (FEN): r4rk1/1p1q1ppp/p2p1n2/n2p1b2/1Q1P4/2N1PN1P/PP2BPP1/R4RK1 w - - 1 14
White to move.
Themes: Hanging Piece Middlegame  
Puzzle rating: 1278
Best move: Qxa5