Chess puzzle (Checkmate)
Opening: Ponziani_Opening, Ponziani_Opening_Caro_Gambit
Moves: 1. e4 e5 2. Nf3 Nc6 3. c3 d5 4. Qa4 Bd7 5. exd5 Nd4 6. Qd1 Nxf3+ 7. Qxf3 Nf6 8.
d3 Bg4 9. Qe3 Qxd5 10. d4 O-O-O 11. Qxe5 Qxe5+ 12. dxe5 *
Position (FEN): 2kr1b1r/ppp2ppp/5n2/4P3/6b1/2P5/PP3PPP/RNB1KB1R b KQ - 0 12
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 513
Best move: Rd1#