Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Other_variations
Moves: 1. d4 d5 2. e3 c5 3. Nf3 Nc6 4. g3 Bg4 5. Bg2 e6 6. O-O Nf6 7. c3 Be7 8. Re1
O-O 9. Nbd2 cxd4 10. cxd4 Ne4 11. Nxe4 *
Position (FEN): r2q1rk1/pp2bppp/2n1p3/3p4/3PN1b1/4PNP1/PP3PBP/R1BQR1K1 b - - 0 11
Black to move.
Themes:  Opening  
Puzzle rating: 1221
Best move: dxe4