Chess puzzle (Checkmate)
Opening: Nimzo-Larsen_Attack, Nimzo-Larsen_Attack_Other_variations
Moves: 1. b3 g6 2. Bb2 Nf6 3. Nc3 Bg7 4. e3 O-O 5. Qe2 d6 6. O-O-O a5 7. Kb1 a4 8. f3
axb3 9. axb3 Be6 10. g4 c5 11. Qg2 Qa5 12. h4 Nd5 13. h5 Nxc3+ 14. dxc3 Bxc3
15. b4 Qa1+ 16. Bxa1 *
Position (FEN): rn3rk1/1p2pp1p/3pb1p1/2p4P/1P4P1/2b1PP2/2P3Q1/BK1R1BNR b - - 0 16
Black to move.
Themes: Queenside Attack Middlegame Mate in 1 
Puzzle rating: 956
Best move: Rxa1#