Chess puzzle (Checkmate)
Opening: Scotch_Game, Scotch_Game_Classical_Variation
Moves: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Nxc6 Qf6 6. f3 dxc6 7. Nc3 Bd7 8.
f4 O-O-O 9. e5 Qg6 10. Qf3 Bg4 11. Qe4 Qxe4+ 12. Nxe4 *
Position (FEN): 2kr2nr/ppp2ppp/2p5/2b1P3/4NPb1/8/PPP3PP/R1B1KB1R b KQ - 0 12
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 749
Best move: Rd1#