Quick note for the battle going on.
On
this post, Sai defends with a Jutsu that is not defensive.
However you add his full accuracy in none the less, instead of getting the full 835 accuracy you instead only would have had +427 (rounded down from .5).
This in turn would have made your total defense value of 1277 instead of 1685.
Compared to Blue Blue's attack value of 895, you still would have had a (50%+79%) 129% or less roll however and thus your goal to roll would have been the same. Just wanted to note it, so that for future reference you would remember that if a Jutsu/Item your countering with doesn't have "defensive" that it only gets 1/2 it's accuracy bonus AND costs x3 the Chakra/Fatigue/Uses.