Chess puzzle (Advantage)
Opening: Vant_Kruijs_Opening, Vant_Kruijs_Opening_Other_variations
Moves: 1. e3 e6 2. h3 d5 3. a4 c5 4. a5 Nf6 5. d4 Nc6 6. dxc5 Bxc5 7. Bd2 O-O 8. Nc3
Bd7 9. Nb5 Nxa5 10. Bxa5 b6 11. Bc3 Ne4 12. Be5 f6 13. Bh2 Bxb5 14. Bxb5 Bb4+
15. c3 Nxc3 16. Qd2 *
Position (FEN): r2q1rk1/p5pp/1p2pp2/1B1p4/1b6/2n1P2P/1P1Q1PPB/R3K1NR b KQ - 1 16
Black to move.
Themes: Defensive Move, Pin Middlegame  
Puzzle rating: 1769
Best move: Na2