Chess puzzle (Advantage)
Opening: Nimzowitsch_Defense, Nimzowitsch_Defense_Declined_Variation
Moves: 1. e4 Nc6 2. Nf3 b6 3. d4 Bb7 4. d5 Nb8 5. Bc4 e6 6. O-O Qf6 7. Bb3 Bc5 8. c4
Ne7 9. Nc3 Bb4 10. Bg5 Qg6 11. Bc2 f6 12. e5 Nf5 13. exf6 gxf6 14. Bh4 Bxc3 15.
bxc3 Rg8 16. g3 Na6 17. Nd4 Nxh4 *
Position (FEN): r3k1r1/pbpp3p/np2ppq1/3P4/2PN3n/2P3P1/P1B2P1P/R2Q1RK1 w q - 0 18
White to move.
Themes:  Middlegame  
Puzzle rating: 900
Best move: Bxg6+