What is the sidebar in game analysis? - Chess Forums

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?

UI Suggestions [ ] [ ] [ ]: Use of Analysis panel real estate to maximize move display - Chess Forums

Blunder (Mate in 98). Never seen a guaranteed mate this many moves away. Anyone know what the max possible is? : r/chess

A Guide to the New Analysis Board and Editor - Chess Forums

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chess24 community blog and forum

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From Naroditsky's latest speedrun game- he is considering restarting partly due to the prevalence of suspicious games. : r/chess

What is the sidebar in game analysis? - Chess Forums