Chess is 99% a tactical story! All grandmasters are unanimous on the subject. Beginners and club players must imperatively be aware of this maxim. The fastest and most effective way to improve your chess performance is to increase your tactical skills so that you can see at a glance the winning tactical patterns. There is no doubt that the best way to acquire good tactical vision is to do exercises that teach you to recognize the tactical elements that make up each combination. This book focuses on the crucial positions that every chess player needs to know. It cannot be overemphasized that knowledge of strategy is of little use if you have not first mastered the fundamentals of tactics. Good exercises to all!