Answers.Body: <p>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.</p>
  
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Answers.CreationDate: 2022-07-26T09:04:19.190Z
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Body: <p>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 &quot;Friendly&quot; game (which gives you feedback for your moves).</p>
  <p>During practice, the move that's considered &quot;excellent&quot; is considered an &quot;inaccuracy&quot; in the exact same game against a computer.</p>
  <p>I'm not sure about chess notation, I'll try to supply pictures.</p>
  <p>The position I reach as black is this one, trying to figure out my next best move:</p>
  <p><a href="https://www.chess.com/openings/Ruy-Lopez-Opening-Morphy-Defense-Caro-Variation-5.Bb3" rel="nofollow noreferrer">Ruy López Opening: Morphy Defense, Caro Variation, 5.Bb3</a></p>
  <p><a href="https://i.sstatic.net/yGUW8.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/yGUW8.jpg" alt="enter image description here" /></a></p>
  <p>If I practice this position (<a href="https://www.chess.com/practice/custom?fen=r1bqkbnr/2pp1ppp/p1n5/1p2p3/4P3/1B3N2/PPPP1PPP/RNBQK2R%20b%20KQkq%20-%202%205" rel="nofollow noreferrer">here</a>), Bishop to b5 is rated as &quot;good&quot;</p>
  <p><a href="https://i.sstatic.net/zBYbk.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/zBYbk.jpg" alt="enter image description here" /></a></p>
  <p>But if I do the exact same move in my own game, it's rated as &quot;inaccuracy&quot;</p>
  <p><a href="https://i.sstatic.net/tRaLG.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/tRaLG.jpg" alt="enter image description here" /></a></p>
  <p>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?</p>
  
Tags: <engines><analysis>
Title: Why do I get two different ratings for same position (López Opening: Morphy Defense, Caro Variatio) on chess.com?
ThreadText: # Why do I get two different ratings for same position (López Opening: Morphy Defense, Caro Variatio) on chess.com?
  
  (Asked by: username_0 on 2022-07-26)
  
  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](https://www.chess.com/openings/Ruy-Lopez-Opening-Morphy-Defense-Caro-Variation-5.Bb3)
  
  [![enter image description here](https://i.sstatic.net/yGUW8.jpg)](https://i.sstatic.net/yGUW8.jpg)
  
  If I practice this position ([here](https://www.chess.com/practice/custom?fen=r1bqkbnr/2pp1ppp/p1n5/1p2p3/4P3/1B3N2/PPPP1PPP/RNBQK2R%20b%20KQkq%20-%202%205)), Bishop to b5 is rated as "good"
  
  [![enter image description here](https://i.sstatic.net/zBYbk.jpg)](https://i.sstatic.net/zBYbk.jpg)
  
  But if I do the exact same move in my own game, it's rated as "inaccuracy"
  
  [![enter image description here](https://i.sstatic.net/tRaLG.jpg)](https://i.sstatic.net/tRaLG.jpg)
  
  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?
  
  **Tags:** engines, analysis
  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2022-07-26. Score: 7 | Accepted answer
  
  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.
  
  
  ---
  
  