4 rooks in advent

Two white and two black rooks have come together for the endgame. But the main role is played by the white queen, which, as so often, tips the scales. Without her, the two white heavyweights would have a hard time reaching checkmate, although they do stack up quite threateningly next to the regent. And already after the first attempts to solve the problem, one thing quickly becomes clear, it would be quite simple - if there would be a fifth move! But it's Advent, so the question is, as it has been in previous years: First one, then two, then three, then four, then a king lies on the board? Netschach wishes a wonderful advent season!