Same game but different analysis/score
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Takashi133
Oct 16, 2021
0
#1
Have been playing a friend of mine. After the last game he sent a screenshot of the analysis screen where the Chess.com engine evaluates your accuracy. There was a roughly 7% difference between what he had on his screen vs what was on mine.
Any ideas?
Oct 16, 2021
0
#2
Some kind of glitch, Im sure if you analyze it again your screenshots would be same. Recently Hikaru analyzed one of his games on stream and at first his accuracy was about 91% and he was confused why because he was expecting higher number and just few moments later it fixed itself and was 95% now. Strange
Oct 16, 2021
0
#3
You may have your options set differently for the analysis. If you take a look at the options you will see that you can set the depths manually. This will either take more or less time depending upon how deeply you want the analysis done. Also, I do believe the analysis is done in JavaScript on your system and that the code uses a time limit, not a depth limit for the completion criteria. What that means is that a faster system will actually calculate longer and come up with a different evaluation. I see this from my tablet to my desktop.
You will also notice some other minor glitches with the system but I wouldn't call them bugs. I would just say that you need to understand how the analysis system is working. For instance, it might say a move is the best move and yet when you select that move to examine it, now it says it's in an accuracy. And that the move that it just got done saying wasn't in accuracy a minute ago is now the best move. It's because of the amount of time it's taking to do the analysis and calculate your lines. If you click the check box for show lines and you have turned up the time limit on the analysis, it will often say moves that were the best move in the main analysis texts are not even in the lines which are shown below and could take 30 seconds or more to complete calculating. That move it said was the best move in one second is long forgotten in the three lines below. Just watch how long those numbers change. Even the orders of the lines will change.