By compiling thousands of real-game examples, Polgár created a map of the chess middlegame that allows students to absorb master-level intuition. Why You Need a "Verified" PGN
A verified PGN will contain accurate headers. This includes the names of the original players, the year the game was played, the event, and the correct result. This allows you to look up the full game to understand the opening that led to that specific middlegame. 3. Proper Tagging and Categorization laszlo polgar chess middlegames pgn verified