For more than four thousand years people have been fascinated by the Asian strategy board game Go. It has always been regarded as a beneficial way to foster creative thinking. This exercise book is aimed at players who can't let go of this fascination and now want to work towards a better understanding of the game. The degree of difficulty of the tasks is thus beyond a beginner - here begins the training. The book contains challenging tasks from all the fundamental areas: opening, middle game, tesuji, life and death, and endgame. It is rounded off by three special sections dedicated to the topics of shape, reading and ko. Within each section, the tasks vary from easy to tricky.