Can Gandalf beat the Nazgul?

In Fellowship, Gandalf defeats all nine nazgul on weathertop, so clearly the answer is – yes, he could.

Why did the Witch King think he could kill Gandalf the White at Minas Tirith after Gandalf the GREY drove off all nine at once on Weathertop?

Because he thinks that he had Sauron’s backing which is more powerful than Gandalf. The Witch King’s power depends upon Sauron, so if Sauron becomes powerful and strong so was the Witch King.

Why was the Nazgul able to break Gandalf’s staff?

Gandalf’s staff holds enormous power, of which is seen very little in the films. Gandalf’s white staff was broken when he fought the Witch-king atop one of the Minas Tirith walls when he attempted to deflect a flaming attack from the Lord of the Nazgûl’s sword.

Who is more powerful Gandalf or witch king?

Gandalf is far more powerful than the Witch-king for a number of reasons. Gandalf was created at the literal beginning of time, while the Witch-king has been around for about an age. Gandalf is a Maiar who has been sent to Middle-earth, with reduced powers, the Witch-king is a human wraith with some of Sauron’s power.

Could the Lord of the Nazgûl have slain or Defeated Gandalf?

My short answer is “Yes, the Lord of the Nazgûl could have slain or defeated Gandalf”. Well, I’m sure he could have slain Gandalf the Grey. I’m not sure about Gandalf the White, but given that Gandalf himself was in doubt of the outcome I’m willing to say that it would not have been a slam dunk by any means.

Was Gandalf the White stronger than Gandalf the Grey?

By the time the Lord of the Nazgûl reached the gates of Minas Tirith he was at the height of his power, whatever that means. We know that Gandalf the White was stronger than Gandalf the Grey, but he still had some limitations.

Was Gandalf allowed to use his power against Sauron?

Gandalf seemed to be allowed to use his power only in measure of the foe he faced. Remember that, were it not for the danger to Faramir, he was about to face down the Witch King and mentions that it was possible that he be tested against Sauron.

How confident is the Witch-king when he meets Gandalf?

The Witch-King is quite confident when he faces Gandalf at the ruined gates of Minas Tirith, so it is not obvious to him that he is outmatched.