You're looking for a PDF on endgame tactics by Van Perlo, specifically a 39-piece scenario. I'll provide some general information and potential resources.
Improved study approach
If you already have a scanned copy or an older edition, I can help you: van perlo 39s endgame tactics pdf better
3.1. The Role of Geometry Van Perlo’s positions often rely on geometric motifs that do not exist in the opening or middlegame. Knight forks, double checks, and stalemate defenses are ubiquitous. By forcing the student to solve these positions, the book trains the mind to visualize complex piece coordination. Unlike opening preparation, which relies on memory, endgame tactics rely on visualization—a skill that is not subject to "forgetting." You're looking for a PDF on endgame tactics
Unique Humor and Style: Ger van Perlo’s sardonic and entertaining commentary gives the book a unique flavor that keeps readers engaged, a rarity for endgame literature. The Role of Geometry Van Perlo’s positions often
Interactive Courses: Platforms like Chessable offer a gamified version of the book, using spaced repetition to help you "engrain" these tactical patterns into your memory. Usage Tips Intermediate Endgame Resources? : r/TournamentChess