I am reasonibly sure that there were better plays prior to this situation; but, this is the set up I ended up with. Enjoy!
White to move and force mate in three
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For what it's worth, the queen is not a vital part of this mate. The long distance bishop helps inbetween moves to prevent the king from escaping. Then the rook and knight do their worst. Remember three forced moves, black never gets a chance to capture the queen (or do anything else for the matter).