Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Chigorin_Variation
Moves: 1. d4 Nf6 2. Nc3 d5 3. Nf3 Bf5 4. e3 e6 5. Bd3 Bxd3 6. cxd3 a6 7. a3 Bd6 8. h3
O-O 9. e4 dxe4 10. dxe4 Be7 11. e5 Nd5 12. Nxd5 Qxd5 13. Bg5 *
Position (FEN): rn3rk1/1pp1bppp/p3p3/3qP1B1/3P4/P4N1P/1P3PP1/R2QK2R b KQ - 1 13
Black to move.
Themes:  Middlegame  
Puzzle rating: 1691
Best move: Bxg5