I got far with the advice but as racing gets tighter the margins get smaller.

Got an even closer situation https://youtu.be/7cPWrCeRHNg?t=203 purple car thinks this is commendable "late braking" while I am thinking that I ended my straight and started my turn in front that I am good for protection. Is "turn point" per car or does the track have an objective spot where in space or time checks canbe made?

Is there some rule which differentiates divebombing out from forbidden barge passing? I was using a definition that the turn-in point is where the car starts breaking for the corner and this is checked for the car in front. If such a car has to in any shape or form move out of the way of anyone that at that moment behind its the forbidden type of move. A conflicting view was that turn-in happens when the cars orientation changes ie rotation happens.

Now there are 2 more analysis videos. Among the drivers there was disagreement on when the turning happens for the purposes of barge passing. The additional materials are ambigoius in that there is a whole phase "turn-in" and a subpoint of the phase where that is also called "turn-in". One stance says that when you start breaking for the corner that is when the straight ends. Another holds that when the car starts rotating that is when the turn starts.

In partiucalr it seems pretty hairy if a person behind has more speed when a turn is coming up. It is very sensitive on when the oblications to avoid startm as there is no natural other reason to be careful.

Yes, that is what I am basing the observations on.

On the fly there only being a lot of subjective viewpoitn and attention levels can make it pretty shaky to eventually solidify.

So it seems it is pretty on track.

Our gaming group plays and we only recently got beyond guessing the rules to aligning with the more official guidelines. I went over our driving sesssion in a video here https://www.youtube.com/watch?v=YS3GpX9_P6c

At around 4:05 there is a particularly tight situation where I wasn't sure how the rules apply. In particular you can make one block but if you make it near a corner when somebody is almost by your side but not quite it gets fuzzy when the responsibilities shift. If you are by the side they can't squeese you out of the road but if they manage to get in front you can't ram them.

What determines if there is "overlap"? For fast speeds that there is an inch of overlap a micro second before the contact seems insufficient but for slow relative speeds it seems counterintuitive that a car could move sideways and the behind driver have to artificially brake (or is it legitimately how that plays out?).

So how one disintinguishes a barge pass from a forbidden squeezing?