Chess puzzle (Advantage)
Opening: Russian_Game, Russian_Game_Modern_Attack
Moves: 1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. Nxd4 Nxe4 5. Qh5 Nf6 6. Qe5+ Qe7 7. Qe2 Qxe2+
8. Bxe2 Bc5 9. Nf5 O-O 10. O-O Re8 11. Re1 g6 12. Nh6+ Kg7 13. Nc3 d6 14. Nb5
Bb6 15. a4 Ne4 16. Kf1 Nxf2 *
Position (FEN): rnb1r3/ppp2pkp/1b1p2pN/1N6/P7/8/1PP1BnPP/R1B1RK2 w - - 0 17
White to move.
Themes:  Opening  
Puzzle rating: 1832
Best move: a5