The book you are looking for, by John Nunn , is a comprehensive workbook designed to improve practical endgame skills through active problem-solving. Book Overview & Key Features
: Problems range from moderately challenging (1–2 stars) to highly complex (3–5 stars) , the latter often challenging even for Grandmasters. Download File The Chess Endgame Exercise Book.pdf
While direct PDF downloads are often restricted by copyright, you can find the physical book or official digital versions through these retailers: The book you are looking for, by John