: The most likely format for the "Partien" (games). You can open these with free software like LucasChess , ChessBase Reader , or by uploading them to Lichess.org (via the "Import Game" tool).
: Diagrams where you must find the best move (e.g., "White to move and win material" or "Mate in 3").
Since the file ends in , it is a high-compression archive. You will need a specific utility to open it: Extract the Files : Windows : Use 7-Zip (free/open-source) or WinRAR. Mac : Use The Unarchiver or Keka. Mobile : Use the iZip or ZArchiver app. Identify the File Formats Inside : J Ferien PartienTaktikfragen 7z
: Proprietary ChessBase formats. You will need ChessBase or the free ChessBase Reader to view these. What to Expect in the Content
: These will contain the text-based guide, diagrams, and questions. : The most likely format for the "Partien" (games)
The name translates to likely curated for students or club players to study during school breaks. How to Access and Use the Guide
Typically, a "PartienTaktikfragen" guide is structured as follows: Since the file ends in , it is a high-compression archive
Does this file belong to a specific chess club or software program you are using, or