"Self-taught chess game" by Emmanuel Schiffers - a classic of chess literature. The chapters on the methodological approach to learning have great pedagogical value, and the plans for solving some problems in this textbook coincide with the algorithm developed for computers today! Unfortunately, the book has long become a bibliographic rarity, but for chess practitioners who have it, it is rather an advantage in the fight against rivals. Schiffers' self-teacher is a useful book for both young chess players and experienced masters.