Chess puzzle (Checkmate)
Opening: French_Defense, French_Defense_Tarrasch_Variation
Moves: 1. e4 e6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nf6 5. Bd3 Nc6 6. c3 b6 7. Nf3 Bb7 8.
Nxf6+ gxf6 9. O-O Bd6 10. b4 Qd7 11. a4 O-O-O 12. a5 e5 13. axb6 axb6 14. Bb5
Qf5 15. d5 Ne7 16. Qa4 Nxd5 17. Bc6 Nxc3 18. Qa8+ Bxa8 *
Position (FEN): b1kr3r/2p2p1p/1pBb1p2/4pq2/1P6/2n2N2/5PPP/R1B2RK1 w - - 0 19
White to move.
Themes: Queenside Attack Middlegame Mate in 1 
Puzzle rating: 996
Best move: Rxa8#