Accuracy glitch
From Ephinea PSO Wiki
Accuracy glitch (aka SN or SNS glitch) is a bug that allows you to overwrite the accuracy of an earlier attack in a combo with the accuracy of a later attack.
The combo step (1, 2, 3) updates when the later attack is input but the attack type (N, H, S) is updated when the animation for the next attack starts.
For most projectile weapons this means that S1 can be glitched to have N2 accuracy (for example), but melee weapons that can be glitched S1 could only take on S2 accuracy.
