1) RB̲f8; Qxf8 (or Pa6)
2) Qxf8# (or Qxa6#)
White RookBishop on c5 uses it's bishop vest power to move to f8. Black has TWO options: 1) Capture f8 with black Queen, then white captures f8 with Queen hovering on a3, checkmate. 2) Black pawn moves to a6, then white captures a6 with Queen, checkmate.