Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Krause_Variation
Moves: 1. d4 d5 2. Nf3 c5 3. c3 cxd4 4. cxd4 Nc6 5. Nc3 Nf6 6. e3 a6 7. a4 Bg4 8. Be2
e6 9. O-O Bd6 10. h3 Bf5 11. Bd2 Qb6 12. Nh4 Qxb2 *
Position (FEN): r3k2r/1p3ppp/p1nbpn2/3p1b2/P2P3N/2N1P2P/1q1BBPP1/R2Q1RK1 w kq - 0 13
White to move.
Themes:  Middlegame  
Puzzle rating: 1393
Best move: Nxf5