Not even close. I hate you for even bringing this up. Well, I'm kidding, as always. But you really have wrecked my whole morning. What the heck, I've been set off, I may as well explain this.
A chain builds. It then resolves. In reverse order. This means that something (A) chained to something else (B) will resolve BEFORE B, even though it (A) was activated later. Chaining exists only in the example of things with spell speeds. You cannot chain to a summon, an attack, or a continuous effect, because those beasties don't have spell speeds. You cannot chain to an Archfiend, don't ask why, I'm not in the mood to explain it.
Responding is a more general term, but INCLUDES chaining in its definintion. THe difference being that chaining can only occur when you're chaining to an effect that has activated, but not resolved. When you're building a chain. RESPONDING, however, CAN (not must) initiate a NEW chain. Here are some of the things you can respond to:
A summon (
Trap Hole)
An attack (
Magic Cylinder)
The beginning of a phase (there is always a point here where turn player has priority to begin a chain)
An effect activating (remember that responding CAN be the same as chaining)
So a response is any effect activated directly following another event, be it a chain or not. Don't ask me to explain a non-responsive window, you want an explanation of that, go read "
Enemy Controller question".
-pssvr
PS Please excuse my bad attitude, I just got up, and here you come with this big question
