Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Accelerated_London_System
Moves: 1. d4 d5 2. Bf4 Bf5 3. e3 e6 4. c3 a6 5. Nd2 Bd6 6. Bg3 h6 7. f4 Ne7 8. Ngf3
O-O 9. Bh4 Qd7 10. h3 Ng6 11. g4 Be4 12. Nxe4 *
Position (FEN): rn3rk1/1ppq1pp1/p2bp1np/3p4/3PNPPB/2P1PN1P/PP6/R2QKB1R b KQ - 0 12
Black to move.
Themes:  Middlegame  
Puzzle rating: 1261
Best move: dxe4