: Diagrams where you must find the best move (e.g., "White to move and win material" or "Mate in 3").
: 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). J Ferien PartienTaktikfragen 7z
Does this file belong to a specific chess club or software program you are using, or : Diagrams where you must find the best move (e