Rooks like open files. At the start of the game, they are stuck in the corners and are often the last pieces to be developed. Even then, they often have to wait until some pawns and pieces are exchanged before they can get open lines to travel on.
It is in the endgame that Rooks do best. There are lots of open lines for them to move on and they can rampage around, attacking weak pawns, cutting off the enemy King, and helping their own pawns to Queen.
But it is surprisingly easy , even in an endgame, to put your Rook in a place where it is going nowhere. Rooks are just not much good at blockading enemy pawns. They lose a lot of mobility if they are reduced to standing in front of an enemy Pawn, trying to stop it moving forward.
In this week’s problem, Black has the chance to make sure White’s Rook is going nowhere. How does he do it?
The solution to last Monday’s problem was that Black plays Bxc3, followed by Bf5. Then the Black Knight gets a superb outpost on e4, with a clear advantage to Black.