Shield break combo
How it works
Normally, when one is shielding and then lets go of the shield button, the shield disappears. This does not happen when the shield is under attack. If one lets go of shield while the opponent's attacks are making contact with the shield, the shield will stay until the attacks stop for a certain amount of time (this is called shield stun). As the attacks make contact, the shield gradually shrinks. If the shield size decreases too much, the shield will break, causing the shielder to become stunned in place for a few seconds, depending on the damage. Normally, there is enough delay after an attack to allow the shielder to remove the shield if he/she chooses to do so, but there exist certain combos in which attacks are executed quickly enough so that the shield stays up for the duration of the combo, at the end of which the shield breaks.
A shield break combo must have these properties:
Variants, special situations
There exist combos that are not always called "true shield break combos," but nevertheless can be utilized to break shields. These combos work only under certain situations. The two most common ones are the shield not being at full strength at the start of the combo and the shielder somehow being locked in a fixed position during the combo due to a feature of the stage.