Chess puzzle (Advantage)
Opening: French_Defense, French_Defense_Advance_Variation
Moves: 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. f4 Qb6 6. Nf3 Nh6 7. h3 cxd4 8. g4 dxc3
9. Nxc3 Bc5 10. Qe2 Bd7 11. Rb1 f5 12. g5 Nf7 13. Bd2 O-O-O *
Position (FEN): 2kr3r/pp1b1npp/1qn1p3/2bpPpP1/5P2/2N2N1P/PP1BQ3/1R2KB1R w K - 3 14
White to move.
Themes:  Middlegame  
Puzzle rating: 1566
Best move: Na4