Analysis of the game based on GM games ?

So here's my question: what is the analysis based on? In this example, it considers that the move I just played was a brilliant one. All the king had to do was take the queen. It suggests a sequence of moves. But the opponent would not necessarily play the move shown in the sequence.

In this second example, I have two brilliant moves. In this game, my goal was to checkmate the back-rater, which I succeeded in doing. I placed my bishop to force the opponent's bishop to capture my bishop. After checking with the queen to force the white rook to take the queen, the black rook took the white rook and back-rank mate. I can understand that.

So, it seems that brilliant moves and move sequences are based on games played by grandmasters. I'm currently around 300 Elo. So here's my observation: when the analysis tells us that we can win a rook with a tactic and suggests a sequence of moves, a 2000 Elo player would understand, but at my current level, I'm incapable of doing so.

A brilliant move is a the best move which involes a sacrafice in it, even tho he doesnt have to take doesnt mean it isnt a brilliant move

"So, it seems that brilliant moves and move sequences are based on games played by grandmasters. I'm currently around 300 Elo. So here's my observation: when the analysis tells us that we can win a rook with a tactic and suggests a sequence of moves, a 2000 Elo player would understand, but at my current level, I'm incapable of doing so."

All you have to do is just calculating and look at ways to attack, ı did around 200 brilliant moves and most of the sacs ıve made are based around attack to the king, just look at the ways how you can attack the king or look for forks and tactics like that and dont sac randomly , try to calculate a lot and long rapid games will help your calculation skills and look at how can your opp respone

Analysis is engine based around evaluations.

https://support.chess.com/en/articles/8572705-how-are-moves-classified-what-is-a-blunder-or-brilliant-etc

Sorry but I ain’t looking at that board

off topic question, where did you get that board and pieces theme?

I found them in a site named sharechess.com. Since I'm curious, I tried a few things out. I came across this chessboard, which I find soothing to the eyes. As for the pieces, same process. There are many choices.

The rook hurt my brain

I read the article. I understand better now.

In that case, (if my translation is correct) if I have to take other screenshots in a forum, I would put back the pieces and chessboard provided by chess.com, which players are used to.