That's pretty true.
Diamond Shield Formation

I completely missed 33...e5 during the game...
The idea is worth knowing. In the following position, there's only one way to prevent promotion:
Otherwise, White either checks with the Rook (if the Black King leaves the second rank) and promotes the Pawn, or (if the Black King stays on the second rank but does NOT move to g7) White plays Rh8 and skewers the enemy King and Rook eg: after 1. … Ke7 2. Rh8 Rxa7 3. Rh7+ and 4. Rxa7.

I completely missed 33...e5 during the game...
The idea is worth knowing. In the following position, there's only one way to prevent promotion:
Otherwise, White either checks with the Rook (if the Black King leaves the second rank) and promotes the Pawn, or (if the Black King stays on the second rank but does NOT move to g7) White plays Rh8 and skewers the enemy King and Rook eg: after 1. … Ke7 2. Rh8 Rxa7 3. Rh7+ and 4. Rxa7.
Thanks. This is definitely one to remember. I almost missed the reasoning for Rh8, and I'm not at all unfamiliar with skewers, it just shows how this particular type of skewer can creep up in such situations, especially if there were some kind of diversion on the board.

Here's how I learned to remember it:
That's a great position to digest. Thank you.
I can definitely see why this particular lesson stuck with you 😅. Mamlet was probably hoping all the while that you'd play something like Kf7. I bet you a tactic that the opponent started playing faster and more confidently immediately afterwards. I hate it when that happens. It's bad enough that I blundered, but now you've got to act like you had some amazing strategy the whole time 😁.
Is it a draw or a win for white? This is a nice study piece.
I completely missed 33...e5 during the game... in fact I missed yesterday when I was reading the comments, I was somewhat medicated.