Chess puzzle (Checkmate)
Opening: Caro-Kann_Defense, Caro-Kann_Defense_Goldman_Variation
Moves: 1. e4 c6 2. Nc3 d5 3. Qf3 g6 4. exd5 Nf6 5. Bc4 b5 6. Bb3 b4 7. dxc6 bxc3 8.
dxc3 Qc7 9. Bf4 e5 10. Bg5 Nh5 11. O-O-O Nxc6 12. Qxc6+ Qxc6 *
Position (FEN): r1b1kb1r/p4p1p/2q3p1/4p1Bn/8/1BP5/PPP2PPP/2KR2NR w kq - 0 13
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 772
Best move: Rd8#