(Mate Threats and Defenses. Chess Tactics Textbook). A textbook for after-beginners and stronger players. The book contains 1000 examples, of which 76 are with explanations and 924 are for independent solving. The material is divided into 28 chapters. Pictures 2 and 3 show contents of the book. The book is a continuation of the author's book Forsirovannyy mat. GM Yakov Geller is considered one of the best Russian coaches, his charges include Grandmasters Ivan Bukavshin and Alexander Predke, IM Darsen Sanzhayev, WGM Dinara Dorzhieva and others.