We have all noticed what a three tomoe sharigan user sees during a fight with the Naruto vs Sasuke fight (Ch.230 p.6-11) but something has been bothering me for a while: How does it really works? I mean it has never been truly explained how can it predicts that a movement (not talking about nin or gen simply the movements) will be performed with a 100% succes rate. Moreover it's safe to assume that it predicts not only movements of human but those of the objects too, if we assume that Obito saved Kakashi from dying because he predicted that a rock would fall on him for exemple. I've seen some theories about that trying to explain by physics saying that this dojustu break the timeline or something like that but in a world where a boy has a demon in his stomach and where shinobis can breath fire I don't think advanced physics works that much... From my point of view, the sharingan works with chakra movements which it can detects (see Ch.243 p.5). On this image we can see that Obito can see the chakra flow within Rin and apparently some of it outside of her body (little marks around her body) and he used the 2 tomoe sharingan (the less evolved sharingan) only for a couple of minutes. Getting used to the Sharingan the user seems to predict movements better and faster and it's maybe because the evolved sharingan allow to see better the chakra movements within the body and the AIR. That's probably why the tree tomoe is much more superior to the other, because the prediction is made from the chakra flow within the body (by seeing how the chakra is distributed among the muscles and presdicting accordingly) AND the movements that the body creates by moving in the air. Quiet long for a first post, so what do you guyz think about this explanation?