Donald Byrne lost this game — and the engine says it slipped away on move 36 (Kf1). They think you'd have lost it too. Take the board at that exact moment and prove them wrong.
Move 36. Kf1 walked the White king into a mating net that Fischer had been patiently constructing for moves. Kh2 was the only square that kept the king alive; instead, Byrne gifted his opponent a forcing sequence that ended in resignation.
Done gloating? Your own games have moments like this too — we'll find them.
Analysis by Stockfish; commentary AI-written from the engine's findings. BetterChess is a practice tool — no rating guarantees, only fewer blunders.