Chess puzzle (Advantage)
Opening: English_Opening, English_Opening_Kings_English_Variation
Moves: 1. c4 e5 2. Nc3 Bb4 3. g3 Nf6 4. Bg2 Nc6 5. e3 d6 6. Qa4 Bxc3 7. bxc3 O-O 8. d4
e4 9. Ne2 Bg4 10. Qc2 Re8 11. O-O Qd7 12. Nf4 g5 13. h3 *
Position (FEN): r3r1k1/pppq1p1p/2np1n2/6p1/2PPpNb1/2P1P1PP/P1Q2PB1/R1B2RK1 b - - 0 13
Black to move.
Themes:  Middlegame  
Puzzle rating: 1701
Best move: gxf4