Answers.Body: <p>That's either a bug or some non standard chess variant</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2016-07-30T05:53:27.230Z
Answers.LastActivityDate: 2016-07-30T05:53:27.230Z
Answers.UserDisplayName: Jubin Chheda
Body: <p>This is my first question on chess beta and I don't know if I'm insane or if the cpu is broken. So I was playing chess against a CPU on the iPhone with the app 3D Chess Game, and the CPU (playing black) made an odd move. </p>
  
  <p>Black to move:</p>
  
  <p><a href="https://i.sstatic.net/H5gGJ.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/H5gGJ.jpg" alt="Black to move"></a></p>
  
  <p>White to move (one move later):</p>
  
  <p><img src="https://i.sstatic.net/4Dpeh.jpg" alt="White to move"></p>
  
  <p>I obviously edited this to simplify it, but the basic idea is same. That is:</p>
  
  <p><strong>Black moves <code>Rook on a8 to d8</code> and <code>Knight on g8 to f6</code> in the same move.</strong></p>
  
  <p>Is this legal? Or is it just a bug in the system?</p>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2016-05-30T14:57:42.477Z
Comments.Text: It's busted unless you accidentally moved a piece or are playing in with a set of alternate rules.
Comments.UserDisplayName: Tony Ennis
Tags: <engines><analysis><knights><rooks><illegal-move>
Title: Rook and knight used together within the same move - legal?
ThreadText: # Rook and knight used together within the same move - legal?
  
  (Asked by: username_0 on 2016-05-30)
  
  This is my first question on chess beta and I don't know if I'm insane or if the cpu is broken. So I was playing chess against a CPU on the iPhone with the app 3D Chess Game, and the CPU (playing black) made an odd move.
  
  Black to move:
  
  [![Black to move](https://i.sstatic.net/H5gGJ.jpg)](https://i.sstatic.net/H5gGJ.jpg)
  
  White to move (one move later):
  
  ![White to move](https://i.sstatic.net/4Dpeh.jpg)
  
  I obviously edited this to simplify it, but the basic idea is same. That is:
  
  **Black moves `Rook on a8 to d8` and `Knight on g8 to f6` in the same move.**
  
  Is this legal? Or is it just a bug in the system?
  
  **Tags:** engines, analysis, knights, rooks, illegal-move
  
  > **Comments:**
  > **username_1**: It's busted unless you accidentally moved a piece or are playing in with a set of alternate rules.  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_2 on 2016-07-30. Score: 2 | Accepted answer
  
  That's either a bug or some non standard chess variant
  
  
  ---
  
  