Answers.Body: <p>It turns out I was in check:&nbsp;</p>
  
  <p><a href="https://i.sstatic.net/tRb7w.png" rel="noreferrer"><img src="https://i.sstatic.net/tRb7wm.png" alt="enter image description here"></a></p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-03-11T23:22:51.593Z
Answers.LastActivityDate: 2020-03-12T07:47:25.220Z
Answers.LastEditDate: 2020-03-12T07:47:25.220Z
Answers.UserDisplayName: chronoUnknown
Body: <p>I'm black and it's my turn. I'm playing in the Arena chess player against Stockfish.
  This is my current board:</p>
  
  <pre><code>[fen ""]
  [startply "31"]
  
  1. e4 d5 2. exd5 e6 3. dxe6 fxe6 4. Nf3 Nf6 5. Bc4 c6 6. O-O Bc5 7. d4 Bb6 8. Re1 O-O 9. Nc3 Nbd7 10. Ng5 Ne5 11. dxe5 Qxd1 12. Nxd1 Ng4 13. Nxe6 Bxf2+ 14. Nxf2 b5 15. Bb3 Nxf2 16. Nc7+
  </code></pre>
  
  <p>I want to play <strong>Rb8</strong>:</p>
  
  <pre><code>1rb2rk1/p1N3pp/2p5/1p2P3/8/1B6/PPP2nPP/R1B1R1K1 w - - 2 17 
  </code></pre>
  
  <p>but I keep getting errors telling me that's illegal.</p>
  
  <p><strong>HOW IS THIS ILLEGAL??</strong></p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-03-11T23:09:52.830Z
Comments.Text: You are in check and have to resolve that first.
Comments.UserDisplayName: fuxia
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-03-11T23:15:29.753Z
Comments.Text: Oh cripes. Yeah my bad. Thanks
Comments.UserDisplayName: chronoUnknown
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-03-11T23:28:08.267Z
Comments.Text: For future reference, notice in that notation, after Nc7, there is a plus sign. That plus sign is chess notation for "check".
Comments.UserDisplayName: PhishMaster
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-03-12T14:42:36.323Z
Comments.Text: By the way, just because it is obvious to experienced players, that does not mean it is obvious to true novices, and thus, please keep your downvotes to yourself. It is not a bad question just because you think it is easy.
Comments.UserDisplayName: PhishMaster
Tags: <rules><check><illegal-move>
Title: How is this move illegal?
ThreadText: # How is this move illegal?
  
  (Asked by: username_0 on 2020-03-11)
  
  I'm black and it's my turn. I'm playing in the Arena chess player against Stockfish.
  This is my current board:
  [fen ""]
  [startply "31"]
  
  1. e4 d5 2. exd5 e6 3. dxe6 fxe6 4. Nf3 Nf6 5. Bc4 c6 6. O-O Bc5 7. d4 Bb6 8. Re1 O-O 9. Nc3 Nbd7 10. Ng5 Ne5 11. dxe5 Qxd1 12. Nxd1 Ng4 13. Nxe6 Bxf2+ 14. Nxf2 b5 15. Bb3 Nxf2 16. Nc7+
  
  I want to play Rb8:
  1rb2rk1/p1N3pp/2p5/1p2P3/8/1B6/PPP2nPP/R1B1R1K1 w - - 2 17 
  
  but I keep getting errors telling me that's illegal.
  HOW IS THIS ILLEGAL??
  
  **Tags:** rules, check, illegal-move
  
  > **Comments:**
  > **username_1**: You are in check and have to resolve that first.  
  > **username_0**: Oh cripes. Yeah my bad. Thanks  
  > **username_2**: For future reference, notice in that notation, after Nc7, there is a plus sign. That plus sign is chess notation for "check".  
  > **username_2**: By the way, just because it is obvious to experienced players, that does not mean it is obvious to true novices, and thus, please keep your downvotes to yourself. It is not a bad question just because you think it is easy.  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_0 on 2020-03-11. Score: 6
  
  It turns out I was in check:
  
  [![enter image description here](https://i.sstatic.net/tRb7wm.png)](https://i.sstatic.net/tRb7w.png)
  
  
  ---
  
  