Diving Chess: The ultimate physical and intellectual challenge

On the TV right in front of my elliptical machine at the gym yesterday, I saw the likes of this:

I have so many questions:

1. Why???
2. How have I never heard of this “sport” that’s been around since 2012?
3. How heavy is that board and how strong are the magnets keeping the pieces on it and at the bottom of the pool?
4. Why did they change the rule in 2022 to disallow weights on your body to make you have to continuously push the water up with your arms while you’re thinking about your move?

The omniscient internet says regarding the rule change to preclude weights:

“This emphasizes the physical challenge of the sport, requiring players to manage their oxygen levels and natural buoyancy while making a chess move. The inability to use weights means players must expend more energy to stay down, which can burn through their air faster and adds a new layer of strategy and physical endurance to the game.”

Among the statistics presented at the end of a match are:

Forfeits/warnings: The number of times a player surfaces for air without making a move is tracked (a first offense is a warning, a second is a forfeit).

Total time underwater: The accumulated time spent making moves.

Breath-hold duration: Although not an official “statistic” tracked in the final score, a player’s ability to hold their breath for extended periods is a key factor in their performance and is often noted in commentary and related articles.