Chess puzzle (Advantage)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Marshall_Defense
Moves: 1. d4 d5 2. c4 Nf6 3. e3 Bf5 4. Nf3 e6 5. Nc3 h6 6. cxd5 exd5 7. Bd3 Bxd3 8.
Qxd3 Nc6 9. O-O Bd6 10. Re1 Qd7 11. e4 O-O-O *
Position (FEN): 2kr3r/pppq1pp1/2nb1n1p/3p4/3PP3/2NQ1N2/PP3PPP/R1B1R1K1 w - - 1 12
White to move.
Themes:  Middlegame  
Puzzle rating: 1268
Best move: e5