Most tactics and training books are good for boosting your calculation ability, but they do not teach you how to calculate. This is the difference I want to make with my own books, by arranging the exercises in different categories so that the thinking process more closely resembles the one we have during a game. Level 1 of my new series consists of learning how to checkmate your opponent. The first three chapters are a rather classical tactics training, then things get harder. In Chapter 4, you have to trap your opponent's king; in Chapter 5, you have to win by eliminating the defender in your opponent's position; in Chapter 6, by using a decisive double threat and in Chapter 7, with an unexpected winning sacrifice. Chapter 8 consists of a few other problems which required short instructions. You should go through the book chapter by chapter. The complexity of the examples increases throughout the book, and you shouldn't skip a category if you consider it too easy. The book covers the full thinking process you should have when trying to mate your opponent, or when the situation of your opponent's king may tempt you to look further in a mating direction. As with all training, there is a warm-up, a tough phase, a break, a relaxing phase, then another tough phase, and respecting the pedagogical order of the book will make sure that you derive the maximum benefit from it, and are 100% ready for Level 2. After you have completed all 276 exercises in the book you won't let your opponent's king escape when it shouldn't. Reading it should pay off quickly in terms of results! And this is exactly what I wish you.