Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_London_System
Moves: 1. d4 d5 2. Nf3 Nf6 3. Bf4 Bf5 4. e3 e6 5. Bd3 Bxd3 6. cxd3 Bd6 7. Bg5 h6 8.
Bh4 g5 9. Bg3 Bxg3 10. hxg3 Nc6 11. Nc3 Qd6 12. a3 O-O-O 13. b4 e5 14. Nb5 Qe7
15. dxe5 Nxe5 16. Nxe5 Qxe5 17. Nxa7+ *
Position (FEN): 2kr3r/Npp2p2/5n1p/3pq1p1/1P6/P2PP1P1/5PP1/R2QK2R b KQ - 0 17
Black to move.
Themes:  Middlegame  
Puzzle rating: 1001
Best move: Kb8