Chess puzzle (Checkmate)
Opening: Van_Geet_Opening, Van_Geet_Opening_Berlin_Gambit
Moves: 1. d4 d5 2. e4 dxe4 3. Nc3 Nc6 4. d5 Nb4 5. a3 e6 6. axb4 Bxb4 7. Bd2 exd5 8.
Nxd5 Bxd2+ 9. Qxd2 c6 10. Nc3 Qxd2+ 11. Kxd2 Bg4 12. Nxe4 O-O-O+ 13. Kc1 *
Position (FEN): 2kr2nr/pp3ppp/2p5/8/4N1b1/8/1PP2PPP/R1K2BNR b - - 2 13
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 796
Best move: Rd1#