Chess puzzle (Checkmate)
Opening: Rat_Defense, Rat_Defense_English_Rat
Moves: 1. d4 d6 2. c4 e5 3. dxe5 dxe5 4. Qxd8+ Kxd8 5. Nc3 Be6 6. Bg5+ f6 7. O-O-O+
Kc8 8. Bh4 Bxc4 9. e4 Be6 10. Nf3 Bb4 11. Nxe5 fxe5 *
Position (FEN): rnk3nr/ppp3pp/4b3/4p3/1b2P2B/2N5/PP3PPP/2KR1B1R w - - 0 12
White to move.
Themes:  Opening Mate in 1 
Puzzle rating: 668
Best move: Rd8#