Chess puzzle (Advantage)
Opening: Alekhine_Defense, Alekhine_Defense_Two_Pawn_Attack
Moves: 1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. Nf3 d6 5. exd6 cxd6 6. Nc3 Qc7 7. d3 Bg4 8.
Be2 Nc6 9. Nb5 Qd8 10. O-O a6 11. Nc3 g6 12. b3 Bg7 13. Bb2 O-O 14. h3 Bf5 15.
Qd2 Rc8 16. Rfe1 Qd7 17. Ng5 Bh6 18. f4 Bxg5 *
Position (FEN): 2r2rk1/1p1qpp1p/pnnp2p1/5bb1/2P2P2/1PNP3P/PB1QB1P1/R3R1K1 w - - 0 19
White to move.
Themes:  Middlegame  
Puzzle rating: 1101
Best move: fxg5