The Duke frequently invited Morphy to the Italian Opera House in Paris, where the former kept a private box which was, according to Morphy's associate Frederick Edge, so close to the stage that one "might kiss the prima donna without any trouble", and which always contained a chess set, the Duke being a keen player as well as an opera lover.
Morphy was extremely fond of music and opera and was eager to see Norma, which played on his first visit. Unfortunately, his host had seen Norma countless times, and Morphy found himself forced to play chess, even seated with his back to the stage.
As the game progressed, the two allies conferred loudly enough with each other, debating their moves against the American genius, that it attracted the attention of the opera performers.
Madame Penco, who had the role of the
Druidic priestess in Norma, kept looking into the Duke's box, to see what all the fuss was about, even as she was performing the opera. Then the performers who were the Druids, marched about, "chanting fire and bloodshed against the Roman host, who, they appeared to think, were in the Duke's box," Edge recounted.
It is doubtful if the distracted opera singers had a good enough view of what was going on. Comically, Morphy created this brilliant game while spending his time trying to overcome his blocked view of the opera, while the performers tried to catch glimpses of what was going on in the Duke's box.
http://en.wikipedia.org/wiki/Morphy_ver ... nt_Isouard