i'm curious as to how their "core working memory" theory jibes with work showing that chess grandmasters could remember complex chess configurations if they wer

i'm curious as to how their "core working memory" theory jibes with work showing that chess grandmasters could remember complex chess configurations if they were configurations that could occur in real chess games, but with random board placement they could do no better than ordinary people. Is it that certain people who look at numbers more are able to construct patterns in digits where others wouldn't, but may not be able to do the same with a sequence of pictures or words. My point, I don't think they've done enough to disentangle potential dependences.