Answers.Body: <p>It is showing you the results of the analysis for each depth it gets to, sometimes more than once per depth (I think those are upper/lower bound scores, actually). So at depth 20 it thought the best move was -1.13 pawns, and at depth 27 it now knows it's really -1.33 pawns (according to its evaluation).</p>
  
  <p>I like to use the multi-pv setting (click the up spinner next to V++ to increase the number of root moves to analyze), which gives you a good overall perspective of your different options (you can compare <code>c3</code> and <code>Nc3</code>, for example).</p>
  
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Answers.CreationDate: 2016-10-03T17:44:29.313Z
Answers.Text: What's the 8.39 at the end of this line: `20 [-1.13] 7.c3 Bg4 8.h3 Bxf3 9.Qxf3 bxa4 (8.39)`
Answers.UserDisplayName: Snowcrash
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Answers.Text: @SnowCrash that's the time so far, I believe.
Answers.UserDisplayName: Eve Freeman
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Answers.CreationDate: 2012-07-28T04:29:01.233Z
Answers.Text: Just to clarify the two depth numbers, the first number is the depth - that is, the minimum number of plies that the engine has examined in all lines (factoring in A/B pruning).  The second number is "seldepth" or selective depth.  This is the deepest that the engine has calculated.  See [chessprograming](http://chessprogramming.wikispaces.com/Depth) for more info.
Answers.UserDisplayName: Andrew
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Answers.LastActivityDate: 2012-07-24T19:09:45.610Z
Answers.LastEditDate: 2012-07-24T19:09:45.610Z
Answers.UserDisplayName: Eve Freeman
Body: <p>I'm trying to analyze some of my games with the Stockfish UCI engine.  I'd like to make sure I'm interpreting the output correctly.  Using this screenshot as an example.</p>
  
  <p><img src="https://i.sstatic.net/VVQuY.png" alt="stockfish UCI analysis output"></p>
  
  <p>Can someone explain to me all of the output? Such as.</p>
  
  <p>What does this line tell me?</p>
  
  <blockquote>
    <p>20 [-1.13]  7.c3 Bg4 8.h3 Bxf3 9.Qxf3 bxa4 (8.39)</p>
  </blockquote>
  
  <p>What does this line tell me?</p>
  
  <blockquote>
    <p>[-1.33] Depth: 27/40 Nodes: 550933K (4130 kn/s) Time: 133.41 s
    NPS: 4129627 Hash: ---- Load: ---- TB hits: ---- Current: c3 (1/25)</p>
  </blockquote>
  
  <p>If the first number is centipawns why does it continue to analyze positions that seem to give me a worse position?</p>
  
Tags: <analysis><engines><uci>
Title: How do I use the analysis output of a UCI engine?
ThreadText: # How do I use the analysis output of a UCI engine?
  
  (Asked by: username_0 on 2012-07-22)
  
  I'm trying to analyze some of my games with the Stockfish UCI engine. I'd like to make sure I'm interpreting the output correctly. Using this screenshot as an example.
  
  ![stockfish UCI analysis output](https://i.sstatic.net/VVQuY.png)
  
  Can someone explain to me all of the output? Such as.
  
  What does this line tell me?
  
  > 20 [-1.13] 7.c3 Bg4 8.h3 Bxf3 9.Qxf3 bxa4 (8.39)
  
  What does this line tell me?
  
  > [-1.33] Depth: 27/40 Nodes: 550933K (4130 kn/s) Time: 133.41 s
  > NPS: 4129627 Hash: ---- Load: ---- TB hits: ---- Current: c3 (1/25)
  
  If the first number is centipawns why does it continue to analyze positions that seem to give me a worse position?
  
  **Tags:** analysis, engines, uci
  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2012-07-22. Score: 6 | Accepted answer
  
  It is showing you the results of the analysis for each depth it gets to, sometimes more than once per depth (I think those are upper/lower bound scores, actually). So at depth 20 it thought the best move was -1.13 pawns, and at depth 27 it now knows it's really -1.33 pawns (according to its evaluation).
  
  I like to use the multi-pv setting (click the up spinner next to V++ to increase the number of root moves to analyze), which gives you a good overall perspective of your different options (you can compare `c3` and `Nc3`, for example).
  
  > **Comments:**
  > **username_3**: Just to clarify the two depth numbers, the first number is the depth - that is, the minimum number of plies that the engine has examined in all lines (factoring in A/B pruning).  The second number is "seldepth" or selective depth.  This is the deepest that the engine has calculated.  See [chessprograming](http://chessprogramming.wikispaces.com/Depth) for more info.  
  > **username_2**: What's the 8.39 at the end of this line: `20 [-1.13] 7.c3 Bg4 8.h3 Bxf3 9.Qxf3 bxa4 (8.39)`  
  > **username_1**: @SnowCrash that's the time so far, I believe.  
  
  ---
  
  