Chess puzzle (Advantage)
Opening: Indian_Defense, Indian_Defense_Seirawan_Attack
Moves: 1. d4 Nf6 2. c4 e6 3. Bg5 Be7 4. Nf3 d5 5. c5 Nbd7 6. Nc3 c6 7. e3 b6 8. b4 a5
9. a3 axb4 10. axb4 Rxa1 11. Qxa1 bxc5 12. bxc5 O-O 13. Bd3 h6 14. Bh4 g5 15.
Bg3 Nh5 16. Qb1 Nxg3 17. hxg3 Kg7 18. Na4 *
Position (FEN): 2bq1r2/3nbpk1/2p1p2p/2Pp2p1/N2P4/3BPNP1/5PP1/1Q2K2R b K - 2 18
Black to move.
Themes:  Middlegame  
Puzzle rating: 1021
Best move: Qa5+