Chess puzzle (Checkmate)
Opening: Benoni_Defense, Benoni_Defense_Benoni-Indian_Defense
Moves: 1. d4 c5 2. d5 Nf6 3. c4 a6 4. Nc3 Qa5 5. Bd2 Qb4 6. b3 Qb6 7. Nf3 g6 8. e4 Bg7
9. e5 Ng4 10. d6 Nxe5 11. dxe7 Qe6 12. Nd5 *
Position (FEN): rnb1k2r/1p1pPpbp/p3q1p1/2pNn3/2P5/1P3N2/P2B1PPP/R2QKB1R b KQkq - 2 12
Black to move.
Themes: Double Check Middlegame Mate in 1 
Puzzle rating: 783
Best move: Nxf3#