Chess puzzle (Crushing)
Opening: Caro-Kann_Defense, Caro-Kann_Defense_Advance_Variation
Moves: 1. e4 c6 2. d4 d5 3. e5 Bf5 4. f4 e6 5. Nf3 Ne7 6. h3 h6 7. Bd3 c5 8. Bxf5 Nxf5
9. c3 cxd4 10. cxd4 Ne7 11. Qa4+ Nec6 12. Nc3 Nd7 13. Be3 Nb6 14. Qc2 Nb4 15.
Qa4+ *
Position (FEN): r2qkb1r/pp3pp1/1n2p2p/3pP3/Qn1P1P2/2N1BN1P/PP4P1/R3K2R b KQkq - 10 15
Black to move.
Themes:  Middlegame  
Puzzle rating: 1070
Best move: Nxa4