chess puzzle books put you in an artificial situation you are told a combination exists, what the theme is, and what you are required to achieve. This one is different... you may have to reject a tactical idea and simply find a good positional move Key Aim Teaching players to find the right move whatever it may be rather than just looking for checkmates

Encourages solving difficult, complex puzzles over long periods of time without the help of a computer, acting as a muscle trainer for the brain. Key Aim Building the capacity to sustain intense, deep thought
Set up a physical board Many authors strongly recommend using a physical chessboard to set up the positions, rather than just looking at the diagram. Do not rush Authors emphasize taking time to understand the position, rather than racing to the solution Improvement goal The goal is to move from passive knowledge to active, quick recognition of tactical opportunities in competitive games Difficulty grading Introductions often define how the puzzles are graded by ELO rating or difficulty levels 1–5