The following is taken from THE MEMORY ILLUSION by Julia Shaw. Although many posts have been based on her book, these posts covered only a sampling of interesting material. Reading this source is highly recommended.
To become a Memory Grandmaster you need to demonstrate to the World Memory Sports Council that you are able to accomplish the following:
Memorize 1,000 random digits in an hour
Memorize the order of ten decks of cards in an hour
Memorize the order of a deck of cards in under two minutes.
Ed Cooke is a Memory Grandmaster who has said, “What you have to understand is that even average memories are remarkably powerful if used properly.”
To learn more about expert memory performance and memory competitions read
“Moonwalking with Einstein: The Art and Science of Remembering Everything” by Joshua Foer.
To read more about this topic in this blog enter either “Foer” or “Moonwalking with Einstein” into the search block of the healthy memory blog.