I feel obliged to cite D.J. Morgan in British Chess Magazine from 1968 in having picked these puzzles we’ll be looking at. He did a “Quotes and Queries” section that would many times offer examples of themes. You will probably figure out the theme after today, or at least by tomorrow. This position is from Bronstein-Goldenov, Kiev, 1944.
Because e7 is a mating square the Black queen can’t afford to stop defending, White can offer his rooks up to draw her away. 1.Rc8 Rxc8 2.Rxc8 Kd7 [2...Qxc8 3.Qe7#] 3.Rxd8+ Rxd8 4.Qxd8+ Kc6 5.Qe8+ Kb7 6.Qxf7+ Nc7 7.Bd8 and mates in few moves.