King and Rook vs. King and 2Rooks ... can the lone rook salvage a draw provided it doesn't exchange itself?
I don't think so. Basically, the side with two rooks forces this position:
Moving the rook to the 7th rank is the only way to delay mate, but that results in the rook being skewered on the 8th.
King and Rook vs. King and 2Rooks ... can the lone rook salvage a draw provided it doesn't exchange itself?