Christmas Puzzles: Solutions 4

On the final day of the (really quite traumatic) year 2023 we gave you two unusual chess puzzles: one where you had to add a king and bishop to construct a mate in two, and one where you had to reconstruct the entire position. We got them from Frank Scarpa, who today provides full explanations in two very fine videos. You’re ‘gonna hafta’ watch them to get the solutions.