No worries on the escape clause. Glad it helped. It sounds like Vincent and I are on roughly the same page re: the use of SC. Good to know that the NPC is supposed actually flee flee. Although, if I was playing the Fallen Empires version, one might expect an epic sword duel situation with a PC's nemesis. Depending on how the combat played out, I might give the NPC a chance to circle around if I thought it would up the drama/tension.
Regarding Obi-won vs. Anakin, in the fiction, once swords crossed they were face to face, swinging swords at each other the whole time until Obi-won broke off. So, I would definitely say that he did "flee" the fight in that sense. Whether or not he "HAD" to, depends on what you mean. He may very well have fled not because he knew he would lose, but because he knew he would win, but would have to kill Anakin in order to do so, and wanted to give Anakin one last chance. Or, maybe he was going to lose, so he wanted to place himself in a better position tactically. Or, maybe something I am not considering. Either way, he might have fled, or broke contact, in military parlance, as conscious tactical move not born of desperation.
That is how I would describe it using the current moves structure of AW2E. I think its totally possible to adjudicate the O vs. A duel with other PbtA moves structures that don't include the SC endless loop. In fact, without that piece of the pie, I probably would not have described Obi-won taking the higher ground as "fleeing." I would have called it maneuvering. However, I think its semantics, and the current moves accomplish the fiction well, while reinforcing what Vincent says about not wanting to be in SC. So, I like them.