How to calculate the percentage of winning using the evaluation bar?

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variable655

Chess.com has moved on to an expected points model (Classification V2) which uses percentage and Elo to calculate whether the move was a blunder, brilliant, etc.

I want to know how to use the evaluation bar's numerical value and transform that into a percentage of winning without using any of Elo calculation. How can this be done?

For example: If you are white, and the evaluation bar is 0.00, you have 50% chance of winning, while -5.00 means that you have a lesser chance of winning.

Strict evaluation differences don't work since if you are white in a +28.00 position, and you make a move that makes it +24.00, it shouldn't be a blunder.

So, can anyone help?

I_0000_I

I was doing research on this exact topic and found out how to calculate expected points from eval.

0,00 -M1

0,01 -M2

0,02 -M4

0,03 -M8

0,04 -M16

0,05 -M32

0,10 -15

0,20 -7

0,30 -3

0,40 -1

0,50 0

0,60 +1

0,70 +3

0,80 +7

0,90 +15

0,95 +M32

0,96 +M16

0,97 +M8

0,98 +M4

0,99 +M2

1,00 +M1

I dont know how to use Elo to calculate expected points, i hope this helps.

xtreme2020
The thing is there are a lot of factors other than just eval. For example if 2 800s are playing and it’s +10, but only if white finds a 10 move brilliant tactical combination, if he doesn’t it’s -10, realistically black has a much higher chance of winning
rafaelvleite

I don’t know if I agree that 0 eval is 50% chance of winning, maybe it is a lot less. This study does not consider drawing chances.

ClickandMove

Yes it is... The game starts at 0.3 evaluation which is 55% win rate for White... If the evaluation became 0, it only means that Black had equalize the position...