fredthebear: <mistreaver: What is the finish here?>
This game is a resignation, not a checkmate. Black is going to lose a piece and White's position is safe and sound.
It's Black to move in the final position. Black must recapture the White Nf6 to keep the material balanced.
If Black recaptures 15...RxNf6 then 16.BxRf6 wins the exchange. This is one possible solution that is better for White.
If Black recaptures 15...BxNf6 or 15...exNf6, do NOT move the White bishop. Instead, find a fork on the light squares.
Forks are a common tactic in chess because every unit from king to pawn can fork two opposing units at the same time. Forks are more common if two units are close together on the same color of square. In this position, the fork on the light squares occurs with two Black pieces on opposite sides of the board.
The queen is a devasting piece when positioned in the middle of the board. If given open lines, the queen can attack upto 27 different squares from the sweet center.
Did you find it? 16.Qd5+ forks the Black king and the unprotected rook in the corner. Black must get out of check, so 17.QxRa8 gains a piece.
Black saw he would soon lose a rook, and White's position was safe and sound, so he resigned.