Hi Sara.
Without any position to mull over or example all anyone can give
is just the basics.
(this is lifted from a previous thread. I refer to the under 1400 DB
because it is a common under 1400 question. )
Stats appear to favour the holder of the two minor pieces.
On the 1400 DB. (with over 1½ millon games a good base for reference as it
is made up with games played by the lads who read these Forums and some
think this exchange is OK for the Rook).
Searched for games Where one side has just a Rook,
other has Bishop and Knight. (and of course Kings & pawns).
White has the Rook. 2342 games
White Wins 796
draws 371
Black Wins 1175
Black has the Rook 2205 games
Black Wins 733
Draws 390
White Wins 1082
Of course the pawns matter and the Bishop and Knight must work well together.
But overall it does indicate a + for the Bishop & Knight.
Wins for the Rook in R v B+N at the lower level usually happen when one of
the minor pieces gets picked up by the Rook pulling off a tactical trick.
There follows a few examples in
Thread 136505