Chess puzzle (Advantage)
Opening: Nimzo-Indian_Defense, Nimzo-Indian_Defense_Leningrad_Variation
Moves: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 h6 5. Bxf6 Qxf6 6. e4 d6 7. Rc1 c5 8. d5
O-O 9. f3 Nd7 10. Bd3 Ne5 11. Ne2 exd5 12. cxd5 Nxf3+ *
Position (FEN): r1b2rk1/pp3pp1/3p1q1p/2pP4/1b2P3/2NB1n2/PP2N1PP/2RQK2R w K - 0 13
White to move.
Themes:  Opening  
Puzzle rating: 1240
Best move: gxf3