Problem challenge: rook vs pawns

That is an endgame that is most often seen in chess. And if you can handle it well, you can score well against opponents who falter. So today we provide you with four positions that will test your skills – and perhaps teach you how to better handle the endgame. In two positions you are asked to win against a defending diagram, in two you are all on your own. Full video solutions will be provided in a week.