Chess puzzle (Advantage)
Opening: English_Opening, English_Opening_Kings_English_Variation
Moves: 1. c4 e5 2. Nc3 d6 3. g3 Be7 4. Bg2 c6 5. b4 Nf6 6. Bb2 Bf5 7. b5 Qb6 8. Na4
Qc7 9. d3 Nfd7 10. bxc6 bxc6 11. e4 Nb6 *
Position (FEN): rn2k2r/p1q1bppp/1npp4/4pb2/N1P1P3/3P2P1/PB3PBP/R2QK1NR w KQkq - 1 12
White to move.
Themes: Hanging Piece Middlegame  
Puzzle rating: 1811
Best move: exf5