Chess puzzle (Checkmate)
Opening: Benko_Gambit_Accepted, Benko_Gambit_Accepted_Pawn_Return_Variation
Moves: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. b6 d6 6. Nc3 Nbd7 7. a4 a5 8. e4 Nxb6
9. Nf3 g6 10. e5 dxe5 11. Nxe5 Bg7 12. Bb5+ Kf8 13. O-O Nfxd5 14. Nc6 Nxc3 *
Position (FEN): r1bq1k1r/4ppbp/1nN3p1/pBp5/P7/2n5/1P3PPP/R1BQ1RK1 w - - 0 15
White to move.
Themes: Hanging Piece Opening Mate in 1 
Puzzle rating: 937
Best move: Qxd8#