This book joins volumes 1 and 2. Under each diagram you will find the solution, which - as you prefer - you may cover or not In addition to the 3348 diagrams classified by themes, this work contains further illustrations of complete games as well as dozens of more diagrams and one chapter of self-evaluation. As for volumes 1 and 2, their particularity and difference consists in the fact that every page showing the solutions alternates with the identical page that does not reveal the solutions, so that a search under various conditions is possible. Should you find any printing errors which might have slipped into this compilation, do not hesitate to contact me.