What is a Brilliant Move?

There has always been confusion for what determines a brilliant move, hopefully this will explain. 

For those who do not know, a brilliant move is a rare occurrence in which the computer ranks your move as 'better' than the best move. You have basically 'outsmarted' the computer, but not exactly. Usually, the average rated consistent player will make a few brilliant moves every week. Note that you will miss brilliant moves if you do not analyse all of your games (so buy chess.com premium )

The Brilliant Move will appear in a blue colour with the notation sign '!!'

So what makes a brilliant move - well, brilliant?

From my research, I have really only come to one conclusion. Here are my findings: 

The way a computer analyses your games is what makes a brilliant move possible. Like some modern day rendering engines, the computer will start processing your game at a lower quality, and work its way up - hence depth levels. If the computer thinks a move is best at a certain level, but calculates further and realises that your move is actually best, then the move will be considered 'brilliant'.

Here's an example:

You play the move Nc3

At depth 10:

- The computer says, lets say Nf3, is the best move. Regards your move as 'excellent', but not best.

It continues calculating the lines of the game...

At depth 14:

The computer reassess, and realises that your move: Nc6, is actually the best move. Your move is now considered 'Brilliant'

Note that this process happens very quickly, almost always much less than a second - so you will not be able to see a move 'turn brilliant'. '

Well, I hope this has helped. If I got anything wrong or missed out on some information, let me know