How to understand the "best move"

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Avatar of LichTerLoh
Hey guys, when I play vs AI and use the assisted mode, then I do see the power Bar shifting between blqck and white advantages. it also evaluates the individual move. But if I go back I also do see in the top right corner a suggestion for the "best move". What is meant by that? is it a move I should have played or white instead of the last move? I'd upload a picture. But somehow I can't do that in the chess.com app directly. I have a scenario where I don't even understand the suggestion move. As the Bishop of neither side can directly do the suggested move. Thanks for your help, feedback and merry Christmas.
Avatar of LichTerLoh

Avatar of Bowser

At the top left of your screen, you have the move that was played (in this case Nxd4). The best move is what the engine thinks you should have played instead of Nxd4 on that turn. 

Now that we’ve cleared that up, you can see that Bh2+ is a legal move for black, if they played it instead of Nxd4.

I hope this helped, let me know if it didn’t and I can try to explain it a different way