Here is a variation of the puzzle posed in Both Leeward and Both Starboard. Basically the same situation as before except that each of the two starboard boats makes contact with the windward side of the other (as windward is defined for each boat in the Definitions in the Racing Rules.)
One imagines that there would be a good deal more shouting in this situation as is it is clear from position 1 that the boats are on a collision course. Red would of course claim that Blue was on her (Red's) windward side in all 3 positions. However Blue would claim that, when the collision occurs, Red was on her (Blue's) windward side and that Red was therefore obliged to keep clear.
So does this differ in principle from the previous example? When Red passed to the windward side of Blue (as defined in the Definitions for Blue, a boat sailing be the lee) was Red obliged to start keeping clear? If neither boat changed course should both be DSQ'd for failing to keep clear under Rule 11?