Hmm... :) Well, firstly, I find it difficult to imagine the implementation of this... this function(?)

I also thought it was unbelievable half a year ago... but...
I can show you how it already works, for example, through RAdmin.

I don't quite understand why this is even needed.

I honestly didn't expect such a question....

similar to chess, try allowing both players to move simultaneously :)

Excellent analogy. Only imagine the same chess, but with a large board, where in the first 6 moves the players cannot reach each other with their pieces, and if they do, it is most likely a bug in the generator ))))
i.e., in the first 6 moves, the players can independently place pieces according to certain rules, and then the sprint will begin according to all the rules of a TURN-BASED strategy.