To me the picture does not make sense so I had to change it a bit for how the marks should look.

I think that the leeward gate is a pretty important part of racing. I personally really like the tactics that one has to decide, sometimes at the last second. You should always be thinking about the best way to get out of this alive!

If the marks are as skewed as you pictured then the port rounding mark would be so favored that you may think everyone would round it, but...you will have to watch closely have have your bail out ready.

The starboard boat is coming into the mark with rights. In the three boat length circle they still have rights as the inside boat. If the rights do not change a boat is allowed to round the mark tactically. This means that they are allowed to round the mark in any fashion they feel is the best for them to continue to the next mark, providing they do not go outside of three boat lengths to do so. It is not for the burdened boat to give them just enough room so they can get their boat between that boat and the mark. That is more similar to a seaman-like rounding.

If you decided to Gybe and be inside boat at the starboard rounding mark then rights would have passed hands, from the Starboard boat to the inside boat. In this case you are given room to round in a seaman like way (as opposed to tactical). Meaning that it may not be the best rounding you could have, as if you were alone at the mark.

From blue to red is where rights change. Light green is rights through the rounding.

Dan