Chess puzzle (Checkmate)
Opening: Blackmar-Diemer_Gambit_Accepted, Blackmar-Diemer_Gambit_Accepted_Ryder_Gambit
Moves: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Qxf3 Qxd4 6. Be3 Qe5 7. O-O-O Nc6
8. Bf4 Qa5 9. Nb5 e5 10. Bd2 Qb6 11. Qc3 Bb4 12. Qg3 Bg4 13. Nf3 e4 14. Ne5
O-O-O 15. Nxc6 bxc6 16. Bxb4 *
Position (FEN): 2kr3r/p1p2ppp/1qp2n2/1N6/1B2p1b1/6Q1/PPP3PP/2KR1B1R b - - 0 16
Black to move.
Themes: Queenside Attack Middlegame Mate in 1 
Puzzle rating: 1101
Best move: Rxd1#