This problem illustrates the epaulette mate by showing another case of a king being smothered by its own pieces, i.e. the two Black rooks.
Black has lost the queen, but gained so much material in return that she now holds a Hugh plus (18 points to 9). Clearly, if white doesn't have a way to checkmate the Black king, she will be overrun by the numerous Black forces.
1.Qe6#