Paul Morphy vs Duke of Brunswick & Count Isouard · Paris Opera House, 1858 · Philidor Defense · 1-0
Paul Morphy played this game at the Paris Opera in 1858 against the Duke of Brunswick and Count Isouard, who consulted together against him. Morphy reportedly played with one eye on the opera performance on stage. The game is the definitive illustration of classical opening principles: rapid development, open files, and piece coordination crush Black, who wastes time capturing pawns instead of developing. Morphy sacrifices a knight on b5 to expose the king, then uses discovered attacks along the d-file and b-file to execute a back-rank checkmate in just 17 moves. This game is required study material at every chess school worldwide and has been played through by millions of beginners learning piece activity.