Chess puzzle (Advantage)
Opening: Slav_Defense, Slav_Defense_Modern_Line
Moves: 1. d4 d5 2. c4 c6 3. Nf3 Bf5 4. e3 e6 5. Nh4 Be4 6. Nf3 Nf6 7. Be2 Bd6 8. O-O
O-O 9. Nc3 Bg6 10. Bd3 a6 11. e4 *
Position (FEN): rn1q1rk1/1p3ppp/p1pbpnb1/3p4/2PPP3/2NB1N2/PP3PPP/R1BQ1RK1 b - - 0 11
Black to move.
Themes:  Opening  
Puzzle rating: 1239
Best move: dxe4