I've send an Email to Kirk Brown asking him about the issue discussed in this post:
DAIL UP; USMRC Newsletter Vol2, Issue 1
It was about this situation:He has written back:
I have sent a RRC on this. I am aware that there are others as well. The proposed call I sent shows Blue closing the door and a collision. The question is: may Blue close the door?
I am coming to believe that the second sentence of rule 18.2b allows Blue to close the door and Yellow must continue to give Blue room to sail 'to' the mark, even though Yellow initially gave Blue room to do just that.
I spent the better part of a weekend last month setting this up on our Catalina 37s. The tactic I used as Yellow was to follow Blue, and when Blue gybed back to the RC boat, then continue on starboard over the top of Blue, falling off when Yellow can clear Blue's transom, or if Blue gybes underneath, then Yellow gybes and Blue will never be able to get to Yellow.
Yellow merely needs to follow Blue and not get trapped and the boats will drift across the finish line. The strategy for Yellow is to get inside the "H" by driving Blue to that point. Once Yellow does that, she cannot lose.
In conclusion, I think the RRC can leave the 'mark trap' in the game, but Yellow has a winning strategy as long as she doesn't get trapped and can drive Blue inside the "H".
But, we'll see.