This week’s problem is about how to be a piece up without taking more of your opponents pieces than he has taken of yours.
The solution is that you bury one of your opponent’s pieces alive so that it can never enter the game.
How can Black to play ensure that he is , to all intents and purposes, playing with an extra piece?
The solution to last Monday’s problem is that White plays 1.f5! and then Black will have a weak pawn on e6 for White to attack.