Chess puzzle (Equality)
Moves: 1. d4 c5 2. d5 g6 3. Nc3 Bg7 4. e4 d6 5. Nge2 Nf6 6. Bg5 h6 7. Bf4 O-O 8. f3
Nh5 9. Be3 e6 10. Qd2 Kh7 11. dxe6 Bxe6 12. O-O-O Qa5 13. Qxd6 *
Position (FEN): rn3r2/pp3pbk/3Qb1pp/q1p4n/4P3/2N1BP2/PPP1N1PP/2KR1B1R b - - 0 13
Black to move.
Themes: Defensive Move Middlegame  
Puzzle rating: 1854
Best move: Na6