Chess puzzle (Advantage)
Opening: Kings_Indian_Defense, Kings_Indian_Defense_Normal_Variation
Moves: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. Bg5 O-O 5. Nc3 d5 6. e3 c6 7. Be2 Bf5 8. Rc1
h6 9. Bh4 dxc4 10. Bxc4 Kh7 11. Qb3 e6 12. Qxb7 Nbd7 13. Qxc6 Rc8 14. Qa4 *
Position (FEN): 2rq1r2/p2n1pbk/4pnpp/5b2/Q1BP3B/2N1PN2/PP3PPP/2R1K2R b K - 2 14
Black to move.
Themes:  Middlegame  
Puzzle rating: 1399
Best move: Nb6