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Fishy stockfish

Somehow, I did the blunder (18. ... ♝g7?) but why do the stockfish analyzer say my opponent recorded the blunder with the little bad move (16. ♘xb5?? ...)?
lichess.org/Da5u68PK

@AdityaMH #1
Difference is that after your move you were still winning (+4 vs. +9), while your opponent could make a winning move 16.Bxb5 but instead dropped the winning advantage into a "white is better" 16.Nxb5.

I think the inaccuracy/mistake/blunder classification is based on percentage of advantage lost rather than the absolute value. So if eval goes from +3 to +1 it would be a blunder, whereas +10 to +8 would not even be considered an inaccuracy.

p.s. there is a possibility that the classification function may take into account both the percentage delta and absolute value delta, I'm not 100% sure. My point is that percentage advantage shift is certainly a big factor.

But my negative points much higher than him at that moment.

P. S.: positive points is for white winning point and negative points is for black winning point.

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