Chess puzzle (Advantage)
Opening: Slav_Defense, Slav_Defense_Other_variations
Moves: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. cxd5 cxd5 5. Nf3 e6 6. a3 Bd6 7. Bg5 Nbd7 8. e3
Qb6 9. b4 O-O 10. Bd3 a5 11. bxa5 *
Position (FEN): r1b2rk1/1p1n1ppp/1q1bpn2/P2p2B1/3P4/P1NBPN2/5PPP/R2QK2R b KQ - 0 11
Black to move.
Themes: Pin Middlegame  
Puzzle rating: 1056
Best move: Qxa5