Mad Queen problem – the solution

It was an Easter puzzle. We asked you to take a try to solve this truly remarkable study by a truly remarkable composer, Mario Matouš. You were asked to win the position against a rampaging queen which wants to sacrifice itself to stalemate the black monarch. Were you able to solve it? Many readers found the problem quite difficult, and extremely clever. Today we give you the full solution, on a replay board with full engine support.