Well, the definition of a brilliant move is a move that sacrifices material and is good or best, so all three examples would classify as a brilliant move.
Each of those moves sacrifices material is one way or another, and none of them are objectively bad moves.
Been getting a lot of brilliant moves lately, just wondering what really classifies it as brilliant move
For example, I got a brilliant move in an OTB tournament recently
https://www.chess.com/a/28BF8Q1z6ALZ4?tab=review
Here, I played with the white pieces, and move 9, d3, was supposedly a brilliant move. In this situation, d3 looks like a normal move that any person would play to bring out their bishop. Somehow, it is "brilliant."
Another instance was in a rapid game I just played after the time of posting.
https://www.chess.com/analysis/game/live/70158252787?tab=review
In this situation, I also played as the white pieces, and on move 19, Nxc4 was a brilliant move. Here, I understand that his move is harder to see than the 9. d3 in the previous game. But, it doesn't seem to increase the evaluation too significantly.
Finally, in a blitz game, I played as the black pieces, and the last move, Qxb3+ was also classified as a brilliant move.
https://www.chess.com/game/live/69550623629
Qxb3 seems to be a relatively simple mate in 2 that isn't so hard to find, and in situations like this before, the move I played was either counted as a "Great Move", or a "Best Move."
In these three games, I feel like the moves that I played all varied in difficulty level to find, so why are all three of them considered brilliant moves?
I also tried searching it up, but the answers varied.
Thanks.