"So now the Opera Game is beginner's stuff -- A player vs C player -- Et tu, Batgirl?"
Whatever that means...
Karl, the very strange duke of Brunswick and the more mysterious Count Isouard were frequent opponents of Morphy during his first time in Paris. Neither were even close to being in Morphy's league, not even in consultation. The Opera game was a beautiful piece of work, but nothing far out of the ordinary for Morphy who had dozens of games equally tantalizing. I think the story behind the game is what makes it eternal.
It's an understandable miscounting. The game has been praised so much that at some point it's hard to believe it's not some superhuman achievement. I was under the spell too, until I read a clinical evaluation along the above lines by Tim Krabbe ( I think).The real lesson, which is actually quite important generally, in my humble opinion, is: don't believe something because everybody says it's so.
IMO it's a game overly praised by beginners -- to my memory no master ever said, check out that Morphy game vs the Duke/Count and see how good he is :)
I associate it more with "this is why beginners think Morphy is at top GM level" i.e. my mis-evaluation doesn't have a nice excuse
"Morphy is in his element. The brilliant combination with sacrifices makes this game one of the most beautiful achievements in the entire history of chess."
-- Maroczy
So now the Opera Game is beginner's stuff -- A player vs C player -- Et tu, Batgirl?
Horse-gack.