Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Other_variations
Moves: 1. d4 d5 2. e3 c5 3. dxc5 Nc6 4. Bb5 e6 5. b4 Nf6 6. Bb2 Be7 7. Nf3 O-O 8. O-O
Nxb4 9. a3 Nc6 10. Bd4 e5 11. Bxc6 *
Position (FEN): r1bq1rk1/pp2bppp/2B2n2/2Ppp3/3B4/P3PN2/2P2PPP/RN1Q1RK1 b - - 0 11
Black to move.
Themes:  Opening  
Puzzle rating: 1563
Best move: exd4