Analysis: Black-whit curve?

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SwedishMaggie
When I let the computer analyse my games there is alway a field like a curve. It’s like a black-white curve moving up and down. What is that? It seems to change with time during the game....
Strangemover

It is a graph to show if white or black was doing better throughout the game. 

SwedishMaggie

And how do I understand the graph? What is better and why?

Strangemover

The flatline is equal, when white is above the line white is doing better, when black is below the line black is doing better. The higher or lower the peak, the better the engine deems that sides position. The left is the beginning of the game, progressing through to the right at the end of the game. 

Strangemover

In the above game you were worse for a while then made a large mistake of some sort when the black side dips severely. 

SwedishMaggie

Wow thank! Where did you find my old hands? SPD nice of I could see them.