by FIDE Master Frank Erwich. Designed as a structured course rather than a random puzzle collection, this book targets players with an . It serves as the advanced sequel to Erwich’s previous workbook for standard club players. Core Content & Themes
A major focus of the book is identifying tactical resources to save difficult positions or use tactics while under heavy pressure. The "Zwischenzug" (In-between Move):
The exercises are specifically curated for players who already have a strong tactical foundation but need to refine their precision.
: A standout feature is the dedicated focus on defending against tactics and using tactical resources under heavy pressure. Chapter Structure
The exercises are pulled from actual master games (not composed studies). Consequently, the winning tactic is often 3 to 5 moves deep. You cannot guess. You must calculate variations. For example, a typical exercise might present a seemingly quiet position where the only winning move is a rook retreat that threatens a battery. Amateurs see the retreat as "passive"; Erwich trains you to see it as "preparation."