Chess puzzle (Advantage)
Opening: Semi-Slav_Defense, Semi-Slav_Defense_Quiet_Variation
Moves: 1. d4 Nf6 2. e3 d5 3. c4 c6 4. Nf3 e6 5. Nbd2 Be7 6. a3 a5 7. b3 O-O 8. Bb2
Nbd7 9. Bd3 Qc7 10. Qc2 e5 11. dxe5 Ng4 12. Ng5 *
Position (FEN): r1b2rk1/1pqnbppp/2p5/p2pP1N1/2P3n1/PP1BP3/1BQN1PPP/R3K2R b KQ - 2 12
Black to move.
Themes: Hanging Piece Middlegame  
Puzzle rating: 1250
Best move: Bxg5