Answers.Body: <p>There is a variant called <a href="https://www.chessvariants.com/difftaking.dir/enpassant.html" rel="nofollow noreferrer">en passant chess</a>.</p>
  <p>Description from the source.</p>
  <h4>En Passant Chess</h4>
  <p>In standard chess, a pawn moving more than one step (i.e. two steps) can be captured by another pawn en passant on the move immediately following the multistep move.</p>
  <p>Let us extend this rule to all pieces:</p>
  <ul>
  <li>We use knightriders instead of knights. The king is a bit special (see below), and we use the other normal chess pieces.</li>
  <li>A piece making a multistep move can be captured by an opponent's piece on its way, as long as this capture is done on the move immediately following the multistep move.</li>
  <li>A piece making a multistep capture can be captured the same way. The piece it captured is not returned to the board (i.e. the capture is not undone).</li>
  <li>As a king only makes a multistep move in castling, and it is already illegal to move it through a checked square, it cannot be captured en passant. It may however capture another piece en passant.</li>
  <li>A king may make a knight (not knightrider) move, in addition to its normal king move, to capture another piece en passant. It may not use this move otherwise, e.g. to capture another piece directly.</li>
  <li>The knightrider only steps on the squares a knight-move away from one another. For example, a knightrider moving from g1 to d7 can only be captured at f3 and e5. We can say that the move unit of a knightrider is a knight move.</li>
  <li>All other pieces step on all squares between the starting and ending squares, so their move unit is a king move. Of course, the move unit of a rook is a wazir move, and that of a bishop is a ferz move only.</li>
  <li>The only multistep move a pawn may make is the two-steps initial move, but beware that in this game it can be captured en passant by any piece!</li>
  <li>Other rules are the same as in normal Chess.</li>
  </ul>
  <p><em>Written by Andy Kurnia. HTML conversion by David Howe.</em></p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-02-01T11:06:36.270Z
Answers.Text: Thanks for the hint.
Answers.UserDisplayName: ferdy
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Answers.CreationDate: 2022-02-01T07:49:04.350Z
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Answers.UserDisplayName: ferdy
Answers.Body: <p>I don't think that there exists such a variant .</p>
  <p>The reason it was added , was that if one side's pawn is on its 5th rank(other's 4th) , and on an adjacent file , the other side has a pawn on the 2nd file , and moves it in one move to the 4th rank , then had it been moved to the 3rd rank , it would have been possible to capture it.</p>
  <p>For example :
  White has a pawn on f5
  Black to move , plays e7-e5
  White plays fxe6 en passant</p>
  <p>This is because the 2-square pawn move was introduced later - had it not been , then black could only play e7-e6 , resulting in fxe6 .</p>
  <p>This would not be possible with any piece.</p>
  
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Answers.CreationDate: 2022-02-01T07:33:43.223Z
Answers.LastActivityDate: 2022-02-01T07:33:43.223Z
Answers.UserDisplayName: QuantumReaper
Body: <p>The en passant rule for pawns can be thought of as an 'attack of opportunity', such as in D&amp;D - the attacking pawn would have been able to take the moving pawn as it passed through the first space.</p>
  <p>When thought of this way, an obvious idea for a variant would be to generalise this by allowing the same behaviour in all cases, i.e. if during their journey a piece passes next to another piece that could have taken it, the next player has the option to invoke 'en passant' and take the piece where it would have been. Knights would be immune, as they 'jump' and thus do not pass through intermediate squares.</p>
  <p>My question is, does this variant already exist, and/or is there a reason why it wouldn't work?</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-12-17T04:48:29.660Z
Comments.Text: A good idea for a generalisation though I have doubts the variant is all that playable because of the extremely high extent to which one piece will be able to tie down opponent pieces (by threat of capture). But I could be wrong and it's interesting for sure
Comments.UserDisplayName: Mobeus Zoom
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-12-17T13:15:42.683Z
Comments.Text: The "attack of opportunity" for pawns arises because pawns only move one space at a time. When the double-move was introduced, "en passant" was introduced right along with it to maintain the very important aspect of the pawn line vs. pawn line. A "sensible" house rule might be more like the structure of the castling rules: any piece (not just other pawns) can capture the pawn "en passant" (as a nod to the idea that pawns "really" move through each square, just like the King during castling).
Comments.UserDisplayName: L. Scott Johnson
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-12-18T08:46:13.643Z
Comments.Text: I saw my chess kiddies playing exactly this variant once, in this sense it "exists". It's definitely not "popular".
Comments.UserDisplayName: Hauke Reddmann
Tags: <chess-variants><en-passant>
Title: Is there a variant in which any piece can be taken 'en passant'?
ThreadText: # Is there a variant in which any piece can be taken 'en passant'?
  
  (Asked by: username_0 on 2021-12-16)
  
  The en passant rule for pawns can be thought of as an 'attack of opportunity', such as in D&D - the attacking pawn would have been able to take the moving pawn as it passed through the first space.
  
  When thought of this way, an obvious idea for a variant would be to generalise this by allowing the same behaviour in all cases, i.e. if during their journey a piece passes next to another piece that could have taken it, the next player has the option to invoke 'en passant' and take the piece where it would have been. Knights would be immune, as they 'jump' and thus do not pass through intermediate squares.
  
  My question is, does this variant already exist, and/or is there a reason why it wouldn't work?
  
  **Tags:** chess-variants, en-passant
  
  > **Comments:**
  > **username_1**: A good idea for a generalisation though I have doubts the variant is all that playable because of the extremely high extent to which one piece will be able to tie down opponent pieces (by threat of capture). But I could be wrong and it's interesting for sure  
  > **username_2**: The "attack of opportunity" for pawns arises because pawns only move one space at a time. When the double-move was introduced, "en passant" was introduced right along with it to maintain the very important aspect of the pawn line vs. pawn line. A "sensible" house rule might be more like the structure of the castling rules: any piece (not just other pawns) can capture the pawn "en passant" (as a nod to the idea that pawns "really" move through each square, just like the King during castling).  
  > **username_3**: I saw my chess kiddies playing exactly this variant once, in this sense it "exists". It's definitely not "popular".  
  
  ---
  
  ## 2 answers
  
  ### Answer by username_4 on 2022-02-01. Score: 3 | Accepted answer
  
  There is a variant called [en passant chess](https://www.chessvariants.com/difftaking.dir/enpassant.html).
  
  Description from the source.
  
  #### En Passant Chess
  
  In standard chess, a pawn moving more than one step (i.e. two steps) can be captured by another pawn en passant on the move immediately following the multistep move.
  
  Let us extend this rule to all pieces:
  
  * We use knightriders instead of knights. The king is a bit special (see below), and we use the other normal chess pieces.
  * A piece making a multistep move can be captured by an opponent's piece on its way, as long as this capture is done on the move immediately following the multistep move.
  * A piece making a multistep capture can be captured the same way. The piece it captured is not returned to the board (i.e. the capture is not undone).
  * As a king only makes a multistep move in castling, and it is already illegal to move it through a checked square, it cannot be captured en passant. It may however capture another piece en passant.
  * A king may make a knight (not knightrider) move, in addition to its normal king move, to capture another piece en passant. It may not use this move otherwise, e.g. to capture another piece directly.
  * The knightrider only steps on the squares a knight-move away from one another. For example, a knightrider moving from g1 to d7 can only be captured at f3 and e5. We can say that the move unit of a knightrider is a knight move.
  * All other pieces step on all squares between the starting and ending squares, so their move unit is a king move. Of course, the move unit of a rook is a wazir move, and that of a bishop is a ferz move only.
  * The only multistep move a pawn may make is the two-steps initial move, but beware that in this game it can be captured en passant by any piece!
  * Other rules are the same as in normal Chess.
  
  *Written by Andy Kurnia. HTML conversion by David Howe.*
  
  > **Comments:**
  > **username_4**: Thanks for the hint.  
  
  ---
  
  ### Answer by username_5 on 2022-02-01. Score: 0
  
  I don't think that there exists such a variant .
  
  The reason it was added , was that if one side's pawn is on its 5th rank(other's 4th) , and on an adjacent file , the other side has a pawn on the 2nd file , and moves it in one move to the 4th rank , then had it been moved to the 3rd rank , it would have been possible to capture it.
  
  For example :
  White has a pawn on f5
  Black to move , plays e7-e5
  White plays fxe6 en passant
  
  This is because the 2-square pawn move was introduced later - had it not been , then black could only play e7-e6 , resulting in fxe6 .
  
  This would not be possible with any piece.
  
  
  ---
  
  