I'm no problem! Nicest move is having unlimited knowledge (10)

I believe the answer is:

omniscient

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'having unlimited knowledge' is the definition.
I can't judge whether this defines the answer.

'i'm no problem nicest move' is the wordplay.
'problem' indicates an anagram.
'move' indicates an anagram.
'im'+'no'='imno'
'imno' anagrammed gives 'omni'.
'nicest' is an anagram of 'scient'.
'omni'+'scient'='OMNISCIENT'

'is' is the link.

Can you help me to learn more?

(Other definitions for omniscient that I've seen before include "Knowing everything" , "All-knowing" .)

I've seen this clue in the Sydney Morning Herald.

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