The solution to last Monday’s problem is that Black must play 1.. Rd8.
If he plays 1… Rxd5, White has 2. Qb8+ Kg7 3. Rxh7+! Kxh7 4. Rh4+ Kg7 5. Qh8 mate. You should always check why an opponent has left a pawn to be taken.
This week’s problem is about the value of the two Bishops. White has the two bishops, but how can he activate his passive bishop on f1?