I do pause it frequently. I’m always astounded at how they can keep all the alternatives at any one position in mind and how he can keep the steam-of-consciousness dialog going. When he’s looking four or five moves ahead, it’s a challenge just to remember where he started the current analysis.
A couple of weeks ago, Tony explained he’s a bit groggy from interrupted sleep due to his baby, and as a result sometimes he loses his train of thought. Five minutes later he did just that and then said, “See what I mean?”
Patterns.
And you just marker the new variant.
Not difficult.
Fischer “scrambled” it before computers.
Then Kasparov due to vast computer tree failed Deep Blue.