When should we exchange a piece in the endgame and when should we keep it? Why is it so important? How to make a right choice? Different types of endings and guidance on how to make the correct decision were the subject of my book The Correct Exchange in the Endgame. Two editions were very well accepted by chess players of different levels. I am especially happy that many chess coaches and teachers found it useful for their training programs. The book was announced as a silver winner of the Boleslavsky Award 2016 by the FIDE Trainer's Commission. Many readers and coaches expressed a wish to see more instructive exercises, so together with Thinkers Publishing we decided to make an exercise book. It can be widely used by chess teachers in schools, coaches in chess clubs and all chess players. Trying to solve 120 instructive exercises and then going through the correct solutions, you will certainly improve your decision-making ability and analyzing skills, as well as enrich your knowledge and understanding of the final stage of the chess game.