Chess puzzle (Crushing)
Opening: French_Defense, French_Defense_La_Bourdonnais_Variation
Moves: 1. e4 e6 2. f4 d5 3. e5 c5 4. Nf3 Ne7 5. d4 b6 6. c4 Ba6 7. dxc5 bxc5 8. b3
Qa5+ 9. Bd2 Qb6 10. Nc3 dxc4 11. Bxc4 Bxc4 12. bxc4 Qa6 *
Position (FEN): rn2kb1r/p3nppp/q3p3/2p1P3/2P2P2/2N2N2/P2B2PP/R2QK2R w KQkq - 1 13
White to move.
Themes:  Opening  
Puzzle rating: 1643
Best move: Nb5