Chess puzzle (Crushing)
Opening: Yusupov-Rubinstein_System, Yusupov-Rubinstein_System_Other_variations
Moves: 1. d4 e6 2. e3 Nf6 3. Nf3 Be7 4. Nc3 O-O 5. Bd3 h6 6. O-O b6 7. h4 Ba6 8. g3
Bxd3 9. Qxd3 c5 10. Bd2 cxd4 11. Qxd4 Nc6 12. Qc4 Rc8 13. Qa6 Qc7 14. Nb5 Qb8
15. c4 Bb4 16. Bxb4 Nxb4 17. Nxa7 *
Position (FEN): 1qr2rk1/N2p1pp1/Qp2pn1p/8/1nP4P/4PNP1/PP3P2/R4RK1 b - - 0 17
Black to move.
Themes: Hanging Piece Middlegame  
Puzzle rating: 1243
Best move: Nxa6