Strange computer review

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apashkin

It's a noob-tier game vs computer and after I finished I turned on game-review.

And if you look at 11-th move for blacks - computer marks it as "excellent" and says: "One of the best moves". But what's so good about it? It looks like just a completely pointless sacrifice of a knight.

Is a deeper meaning?

https://www.chess.com/analysis/library/2DQDw5SAWz?tab=review

bald55

I dont have access to the library collection so I can't view it

Sometimes the game review does stuff like that though

In this position, Qg4 is an excellent move, even though the computer evaluation number goes from -7.14 to -11.6, which is a worse position for white.

apashkin

I've opened the access.

bald55

Hmmmm I'm not sure

It seems like a completely pointless sacrifice of a knight

apashkin

Is there a better automated match analysis software somewhere? Could you recommend something?

bald55

I cannot

omnipaul

When someone is that far behind, almost anything that doesn't directly blunder mate or a queen can be close enough to the top move to be considered "excellent."

It can't get much worse, so a flat difference from the top move is a smaller percentage (0.5 points of difference isn't much compared to 5, but is compared to 0.75), and it is the percentage that the game review cares about (i.e., a certain percentage from the top move is "excellent," while a bigger percentage is an "innacuracy.") Player rating is also taken into account. A 0.5 point swing is a major deal for top players, could be significant at my level, and is tiny for beginners. So, that much of a difference might be a blunder in a Magnus/Hikaru game, might be labelled an "inaccuracy" at my level, but be considered "excellent" for beginners.

bizonbiz

Isn't it fascinating how the context of a player's skill level changes the computer's evaluation of a move? A move like the knight sacrifice, seemingly pointless at a glance, can be an 'excellent' strategy for beginners, showing the depth and adaptability of chess analysis.