4

I've been trying to get back into chess a bit, and noticed the option to practice certain positions - but I've been puzzled by the rating when playing a "Friendly" game (which gives you feedback for your moves).

During practice, the move that's considered "excellent" is considered an "inaccuracy" in the exact same game against a computer.

I'm not sure about chess notation, I'll try to supply pictures.

The position I reach as black is this one, trying to figure out my next best move:

Ruy López Opening: Morphy Defense, Caro Variation, 5.Bb3

enter image description here

If I practice this position (here), Bishop to b5 is rated as "good"

enter image description here

But if I do the exact same move in my own game, it's rated as "inaccuracy"

enter image description here

The ratings also seem fairly different (+0.99 vs +0.39). What am I missing here? Is this move good, or inaccurate? Why do I get two fairly different responses for the exact same game position - does it rate differently according to the opponents Elo rating? Or am I missing something obvious?

1 Answer 1

7

This is very likely due to a different engine search depth. The same effect occurs on lichess, when you request an engine analysis after the game directly vs. when you copy it into a lichess study first. Games in studies are analyzed deeper and engine evaluations can differ. Chess.com typically uses pretty low depth (e.g. 18). When analyzing moves live on chess.com, I have noticed that annotations also sometimes change when replaying the move, suggesting that the position has been calculated deeper, necessitating a change in evaluation.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.