>>104524037I didn't watch the stream, but didn't they get coaching?
If I was doing any kind of chess coaching, I suppose item 1 is making sure they know all the rules properly. But item 2 is definitely, "I'm putting two of your pieces on the board, and I'll only have the king, get a checkmate." Repeat for every valid combination of two pieces.
Forget all other strategy. Beginner chess players can just play tit-for-tat on pieces, and that all just comes instinctually to them.. It's that end game where one person has all the tools to win and the other has none of their tools left that actually decides beginner matches.