What is the sidebar in game analysis?

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Jasiek2r

I am watching game analysis and I wonder what is this sidebar that displays black and white color and some numbers? And why did it change so rapidly when black made this move?




Martin_Stahl
Jasiek2r wrote:

I am watching game analysis and I wonder what is this sidebar that displays black and white color and some numbers? And why did it change so rapidly when black made this move?

https://support.chess.com/article/656-what-do-the-computer-evaluation-numbers-mean-like-225

The first picture shows black was winning, since the black bar was larger and the evaluation was 12 to blacks advantage . The second that white was winning since black allowed the queen to be captured.