If you open the PDF and search for “Damage Step” or “Simultaneous Effects Go On Chain (SEGOC)”, those terms must be present with correct explanations.

Assuming the PDF is authentic, it should include the following key sections:

— KONAMI does not officially distribute a single PDF of the latest rulebook for free download (their website provides a web version). Any PDF you find online is likely a fan‑made scan of the printed booklet.