Chess puzzle (Equality)
Moves: 1. d4 d5 2. c4 e6 3. Nc3 Nc6 4. cxd5 exd5 5. Nf3 Nf6 6. Bg5 h6 7. Bh4 Be7 8.
Bg3 a6 9. e3 Bd6 10. Qc2 Bxg3 11. hxg3 Be6 12. e4 Nb4 13. Qa4+ Nc6 14. e5 Ne4
15. Qb3 Bg4 16. Qxb7 Bd7 17. Nxd5 Rb8 18. Qxa6 Rxb2 19. Bb5 O-O 20. Bxc6 Bxc6
21. Qxc6 Rxf2 22. Rxh6 Rxg2 23. Nf6+ *
Position (FEN): 3q1rk1/2p2pp1/2Q2N1R/4P3/3Pn3/5NP1/P5r1/R3K3 b Q - 1 23
Black to move.
Themes:  Middlegame  
Puzzle rating: 1960
Best move: Nxf6