Answers.Body: <p>Look at the diagram. The engine tells you the best move (Rd8). </p>
  
  <p>The idea behind that move is that it pins the white knight to the queen and at the same time attacks the knight a second time. </p>
  
  <ul>
  <li>Moving the knight white would lose the queen (for a rook).</li>
  <li>If white tries to defend the knight (with c4, Bc4 or Bf3), black would play c6 attacking the pinned knight with a pawn.</li>
  </ul>
  
  <p>So the idea is: first pin, then win the knight with c6.</p>
  
  <p>If you play c6 first, white could just retreat the knight to c3.</p>
  
  <p>It is worth memorizing this theme (pin a piece, then attack it again) as it is quite common. Also works with diagonal pins by queen/bishop.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-03-14T01:36:06.080Z
Answers.Text: One thing I would add is that Rd8 comes with tempo since it contains an immediate threat. Threat defend, then new threat with c6, and wins.
Answers.UserDisplayName: PhishMaster
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-03-14T02:16:16.590Z
Answers.Text: An important tactical point is that the knight can move away with check to f6 or e7.  The rook is not protected after Rd8, so white might hope to play Qxd8 after black responds to the check, but black can capture the knight with the queen and protect the rook.
Answers.UserDisplayName: Ross Millikan
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-03-13T16:44:56.257Z
Answers.LastActivityDate: 2020-03-13T17:18:34.550Z
Answers.LastEditDate: 2020-03-13T17:18:34.550Z
Answers.UserDisplayName: user1583209
Body: <p>When I played a game on chess.com and then ran the analysis afterward, the computer said that the pawn move c6 was incorrect.</p>
  
  <pre><code> [title "Black to play"]
   [fen "r1b2rk1/p1p2p1p/5p2/2bNq3/8/8/PPP1BPPP/R2Q1RK1 b - - 0 1"]
   [startflipped "0"]
  
   1... c6
  </code></pre>
  
  <p>I don't understand why the move is considered a missed win. Can anyone explain why?</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-03-13T17:06:54.990Z
Comments.Text: Welcome to chess SE! Please consider using the [built-in diagram viewer](https://chess.meta.stackexchange.com/questions/179/how-do-i-add-a-replayer-to-my-post) for posting positions. For a better formatting of the question when using images, you can [resize the image](https://meta.stackexchange.com/questions/25051/resizing-an-image-in-a-post/25052#25052) to medium or small with an m or s character respectively, added at the end of the uploaded filename and before its extension. I'll edit in both things here so you have a working example of both features.
Comments.UserDisplayName: Ellie
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-03-13T17:13:59.143Z
Comments.Text: @Phonon thanks so much. I am new to the community and definitely I will learn those features.
Comments.UserDisplayName: hqt
Tags: <analysis><winning>
Title: Why is pawn c6 is not winning here and what is the missed win for black?
ThreadText: # Why is pawn c6 is not winning here and what is the missed win for black?
  
  (Asked by: username_0 on 2020-03-13)
  
  When I played a game on chess.com and then ran the analysis afterward, the computer said that the pawn move c6 was incorrect.
  
  ```
   [title "Black to play"]
   [fen "r1b2rk1/p1p2p1p/5p2/2bNq3/8/8/PPP1BPPP/R2Q1RK1 b - - 0 1"]
   [startflipped "0"]
  
   1... c6
  
  ```
  
  I don't understand why the move is considered a missed win. Can anyone explain why?
  
  **Tags:** analysis, winning
  
  > **Comments:**
  > **username_1**: Welcome to chess SE! Please consider using the [built-in diagram viewer](https://chess.meta.stackexchange.com/questions/179/how-do-i-add-a-replayer-to-my-post) for posting positions. For a better formatting of the question when using images, you can [resize the image](https://meta.stackexchange.com/questions/25051/resizing-an-image-in-a-post/25052#25052) to medium or small with an m or s character respectively, added at the end of the uploaded filename and before its extension. I'll edit in both things here so you have a working example of both features.  
  > **username_0**: @Phonon thanks so much. I am new to the community and definitely I will learn those features.  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_2 on 2020-03-13. Score: 14
  
  Look at the diagram. The engine tells you the best move (Rd8).
  
  The idea behind that move is that it pins the white knight to the queen and at the same time attacks the knight a second time.
  
  * Moving the knight white would lose the queen (for a rook).
  * If white tries to defend the knight (with c4, Bc4 or Bf3), black would play c6 attacking the pinned knight with a pawn.
  
  So the idea is: first pin, then win the knight with c6.
  
  If you play c6 first, white could just retreat the knight to c3.
  
  It is worth memorizing this theme (pin a piece, then attack it again) as it is quite common. Also works with diagonal pins by queen/bishop.
  
  > **Comments:**
  > **username_3**: One thing I would add is that Rd8 comes with tempo since it contains an immediate threat. Threat defend, then new threat with c6, and wins.  
  > **username_4**: An important tactical point is that the knight can move away with check to f6 or e7.  The rook is not protected after Rd8, so white might hope to play Qxd8 after black responds to the check, but black can capture the knight with the queen and protect the rook.  
  
  ---
  
  