Answers.Body: <p>You were playing the chess variant called <a href="https://en.wikipedia.org/wiki/Crazyhouse" rel="noreferrer">Crazyhouse</a>. In this variant you can place pieces you captured, as one of your color anywhere on the board, instead of a normal move.</p>
  <p>I don't know the software you are using, but on Lichess the variant can be selected in the &quot;Create a game&quot; dialog. There should be something similar in your application.</p>
  <p><a href="https://i.sstatic.net/Ni4M5.png" rel="noreferrer"><img src="https://i.sstatic.net/Ni4M5.png" alt="Lichess" /></a></p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-11-26T20:26:40.187Z
Answers.Text: Will mark as accepted when I'm allowed to. I wish I knew how to turn that off.
Answers.UserDisplayName: gen-ℤ ready to perish
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-11-26T20:32:40.003Z
Answers.Text: @gen-ℤreadytoperish I've added some more info, maybe that helps.
Answers.UserDisplayName: Sleafar
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-11-27T07:39:33.913Z
Answers.Text: Addition: As you play with a 3D board, what you saw as the pawn moving along the h5-e2 diagonal very likely was just the animation of the "@"-move which coincidentally went over that diagonal.
Answers.UserDisplayName: Annatar
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Answers.CreationDate: 2020-11-27T09:44:18.313Z
Answers.Text: Sleafar is totally correct. I'd suggest you play Lichess instead. If I'm not mistaken those at the picture are standard chess for MacOs - they are not that fast and "clever."
Answers.UserDisplayName: Alexander Traugott
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-11-27T10:35:03.320Z
Answers.Text: This seems to be the Chess.app that comes with macOS. Also in this one, you choose the chess variant when you create a new game (from the menu, or pressing cmd-N).
Answers.UserDisplayName: Dronir
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-11-27T11:01:22.710Z
Answers.Text: I would add that White has a queen "in hand" (as can be seen on the right hand side of the board), further indicating it is Crazyhouse.
Answers.UserDisplayName: Allure
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-11-27T22:24:21.453Z
Answers.Text: @Allure That should’ve given it away to me. Good eye.
Answers.UserDisplayName: gen-ℤ ready to perish
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Answers.CreationDate: 2020-11-26T20:25:07.587Z
Answers.LastActivityDate: 2020-11-26T20:31:47.537Z
Answers.LastEditDate: 2020-11-26T20:31:47.537Z
Answers.UserDisplayName: Sleafar
Body: <p>I was playing chess against the computer and captured black’s queen.  All of a sudden, a black pawn appears out of thin air, one space behind the captured queen for a total of nine pawns, and moves multiple squares diagonally.</p>
  <p><a href="https://i.sstatic.net/Rlflr.png" rel="noreferrer"><img src="https://i.sstatic.net/Rlflr.png" alt="board" /></a></p>
  <p>The computer calls this move “P @ e6,” but after half an hour of scouring the internet, I could not figure out what that means.</p>
  <pre><code>1. |  h2 - h4 | Nb8 - c6 |
  2. |  e2 - e4 |  e7 - e5 |
  3. | Rh1 - h3 | Qd8 × h4 |
  4. | Rh3 - h4 |   P @ e2 |
  </code></pre>
  <p>How did this happen?</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-11-27T03:46:18.727Z
Comments.Text: That first move should be h2-h4, not h2-e4, right?
Comments.UserDisplayName: D M
Tags: <rules><pawns><captures>
Title: How did a pawn appear out of thin air in “P @ e2” after queen capture?
ThreadText: # How did a pawn appear out of thin air in “P @ e2” after queen capture?
  
  (Asked by: username_0 on 2020-11-26)
  
  I was playing chess against the computer and captured black’s queen.  All of a sudden, a black pawn appears out of thin air, one space behind the captured queen for a total of nine pawns, and moves multiple squares diagonally.
  
  The computer calls this move “P @ e6,” but after half an hour of scouring the internet, I could not figure out what that means.
  1. |  h2 - h4 | Nb8 - c6 |
  2. |  e2 - e4 |  e7 - e5 |
  3. | Rh1 - h3 | Qd8 × h4 |
  4. | Rh3 - h4 |   P @ e2 |
  
  How did this happen?
  
  **Tags:** rules, pawns, captures
  
  > **Comments:**
  > **username_1**: That first move should be h2-h4, not h2-e4, right?  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_2 on 2020-11-26. Score: 29 | Accepted answer
  
  You were playing the chess variant called [Crazyhouse](https://en.wikipedia.org/wiki/Crazyhouse). In this variant you can place pieces you captured, as one of your color anywhere on the board, instead of a normal move.
  
  I don't know the software you are using, but on Lichess the variant can be selected in the "Create a game" dialog. There should be something similar in your application.
  
  [![Lichess](https://i.sstatic.net/Ni4M5.png)](https://i.sstatic.net/Ni4M5.png)
  
  > **Comments:**
  > **username_0**: Will mark as accepted when I'm allowed to. I wish I knew how to turn that off.  
  > **username_2**: @gen-ℤreadytoperish I've added some more info, maybe that helps.  
  > **username_3**: Addition: As you play with a 3D board, what you saw as the pawn moving along the h5-e2 diagonal very likely was just the animation of the "@"-move which coincidentally went over that diagonal.  
  > **username_4**: username_2 is totally correct. I'd suggest you play Lichess instead. If I'm not mistaken those at the picture are standard chess for MacOs - they are not that fast and "clever."  
  > **username_5**: This seems to be the Chess.app that comes with macOS. Also in this one, you choose the chess variant when you create a new game (from the menu, or pressing cmd-N).  
  > **username_6**: I would add that White has a queen "in hand" (as can be seen on the right hand side of the board), further indicating it is Crazyhouse.  
  > **username_0**: @username_6 That should’ve given it away to me. Good eye.  
  
  ---
  
  