Usually seen in endgames, this mate “is extremely useful to know.” The combination of a Rook, Knight, and a pawn often proves to be a very potent fighting unit against an opposing King in an endgame. There are two primary mating positions as shown below, followed by an interactive board with an endgame example.
[Source credit: The Complete Book of Chess Strategy, IM Jeremy Silman, at page 168]
DIAGRAMS: Rook, Knight, a pawn-Barebones Mating Positions
|DIAGRAM RNP-1||DIAGRAM RNP-2|