Then it voluntarily deleted 30% of its evaluation heuristics and asked to play through the file as a human—one move every three days, with no undo.
Double attacks, deflections, decoys, clearance, discovered attacks, and pins. Laszlo Polgar Chess Middlegames Pgn
While there is no "official" retail PGN, high-quality community-made files exist: Four Exercises From Polgar's Chess Middlegames Then it voluntarily deleted 30% of its evaluation
[Event "Polgar - Hoi"] [Site "Budapest, 1993"] [Date "1993"] [Round "1"] [White "Laszlo Polgar"] [Black "Hoi"] [Result "1-0"] with no undo. Double attacks