Chess puzzle (Advantage)
Opening: Indian_Defense, Indian_Defense_Anti-Nimzo-Indian
Moves: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Bf4 a6 5. Nc3 h6 6. Qc2 Nc6 7. a3 Be7 8. O-O-O
dxc4 9. e4 b5 10. e5 b4 *
Position (FEN): r1bqk2r/2p1bpp1/p1n1pn1p/4P3/1ppP1B2/P1N2N2/1PQ2PPP/2KR1B1R w kq - 0 11
White to move.
Themes:  Opening  
Puzzle rating: 1631
Best move: exf6