Chess puzzle (Advantage)
Opening: Alekhine_Defense, Alekhine_Defense_Modern_Variation
Moves: 1. e4 Nf6 2. e5 Nd5 3. d4 Nb6 4. Nf3 d6 5. Nc3 Bg4 6. Be2 dxe5 7. dxe5 N8d7 8.
Bf4 e6 9. h3 Bf5 10. O-O h6 11. Nd4 Bg6 12. Bd3 Bxd3 13. cxd3 Bb4 14. a3 Bxc3
15. bxc3 Nd5 16. Ne2 Nxf4 17. Nxf4 Nxe5 18. d4 Nc4 *
Position (FEN): r2qk2r/ppp2pp1/4p2p/8/2nP1N2/P1P4P/5PP1/R2Q1RK1 w kq - 1 19
White to move.
Themes:  Middlegame  
Puzzle rating: 1053
Best move: Qa4+