I am a litle unclear on this whole "unwritten rule" thing and I really wish they would write them down so it would be easier to keep up. As I understand it one is not suppose to attack the yellow jersey wearer if he has any sort of problem, unless he is deemed by some sort of oversight panel to "not be a serious contender" or there are some cobbles on the course. Looking a little deeper we see that the yellow jersey wearer can decide to neutralize the entire stage if a couple of contenders on his team crash on a rainslicked downhill. Although I seem to remember a time in the past when the 7 time tour winner who is often proffered as the greatest practitioner of this "unwritten rule" put his entire team on the front to ride to distance the 40 some riders (including a number of contenders) who fell on a slippery tidal landbridge crossing and effectively eliminate them from contention. So maybe grade is important? Grade and cobbles, if the road is level and 40 + guys go down at once in slick conditions then it's game on, if it's a downhill then everyone waits? If the YJW punctures then all wait, unless it is on cobbles then game on? If the YJW and the previous years winner (who would therefore be a contender ,no?) were to be held up behind a crash do we wait or if there are cobbles in the mix are we allowed to push on and maximise our time gains?
What if the YJW attackes on a downhill and then crashes, does everyone else have to stop and wait for him to get up? What if a contender attacks over the top of a climb and then the YJW crashes while chasing him down the other side, does the contender have to go back and wait for him to get up, are noncontenders exempt from this? Who decides who is a contender and who is not? What if the contender crashes on the downhill after attacking the YJW over the top? I would assume that the YJW has to wait while the noncontenders can proceed, but could that not transform at least some of them back into contenders?
This really brings up more questions than it answers. Can somebody help me?