Body: <p>In this position (White to play)</p>
  <p><a href="https://i.sstatic.net/UzG50.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/UzG50.png" alt="enter image description here" /></a><br>
  <sub>(Picture credits to the <a href="https://www.chesscompass.com/" rel="nofollow noreferrer">chess compass</a> extension that analyzes a chess.com game after it ended)</sub></p>
  <p>The current Stockfish evaluation (before White plays) is ~0.0.</p>
  <p>But SF would give a -0.8 (+0.8 for Black) if Bg5 takes Nf6 (playing around with SF, the rating goes from -0.9 [picture] to a max at -0.3). Next, SF recommends to take the B, gxf6.</p>
  <p>Why would that be?</p>
  <ul>
  <li>Is it because a B is usually worth more than a N?</li>
  <li>or in this particular position B had better opportunities rather than take the N?</li>
  </ul>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2022-11-05T04:34:58.000Z
Comments.Text: Actually, the white king ends up more vulnerable with gxf6, not the black king.  The black king doesn't end up in the open because there is no way for white to put a rook in a place to attack it.  On the other hand, black can play Kh8 and Rg8 to attack the white pawn at g2.
Comments.UserDisplayName: Alexander Woo
Tags: <analysis><stockfish><trading><king-safety>
Title: Why does Stockfish evaluates the trade of a B vs N that bad, while the trade has the King in the open and doubles pawns?
ThreadText: # Why does Stockfish evaluates the trade of a B vs N that bad, while the trade has the King in the open and doubles pawns?
  
  (Asked by: username_0 on 2022-11-05)
  
  In this position (White to play)
  
  [![enter image description here](https://i.sstatic.net/UzG50.png)](https://i.sstatic.net/UzG50.png)  
  (Picture credits to the [chess compass](https://www.chesscompass.com/) extension that analyzes a chess.com game after it ended)
  
  The current Stockfish evaluation (before White plays) is ~0.0.
  
  But SF would give a -0.8 (+0.8 for Black) if Bg5 takes Nf6 (playing around with SF, the rating goes from -0.9 [picture] to a max at -0.3). Next, SF recommends to take the B, gxf6.
  
  Why would that be?
  
  * Is it because a B is usually worth more than a N?
  * or in this particular position B had better opportunities rather than take the N?
  
  **Tags:** analysis, stockfish, trading, king-safety
  
  > **Comments:**
  > **username_1**: Actually, the white king ends up more vulnerable with gxf6, not the black king.  The black king doesn't end up in the open because there is no way for white to put a rook in a place to attack it.  On the other hand, black can play Kh8 and Rg8 to attack the white pawn at g2.  
  
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  ## 0 answers
  
  