Answers.Body: <p>I don't think it is defined at all.  But in your first case, the pawn is delivering the mate. So I think that would be the 'en passant mate'.  The 2nd case is 'just' a discovered mate.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-02-27T04:32:49.593Z
Answers.LastActivityDate: 2019-02-27T04:32:49.593Z
Answers.UserDisplayName: Tony Ennis
Answers.Body: <p>After some research I could not find  any "official" definition by a chess association/federation. This doesn't really surprise me, as there really is no need for a definition of "e.p. checkmate" to ensure correct play.</p>
  
  <p>However the general internet consensus on the usage of the term seems to agree on the following requirements:</p>
  
  <ul>
  <li>The game has to end with checkmate.</li>
  <li>The last move has to be played en passant.</li>
  </ul>
  
  <p>An exemplary notated move would be "<strong>29... cxd e.p. #</strong>" (although notating e.p. is optional under the <em>FIDE laws of chess (C.9)</em>) - regardless if the pawn capturing delivers check or not. The <a href="https://en.wikipedia.org/wiki/En_passant#Unusual_examples" rel="nofollow noreferrer">Wikipedia examples</a> follow this definition.</p>
  
  <p>As there is no opinion by a regulatory instance about this topic, it seems to be up to you to make up your mind on this topic or bringing it to the attention of said regulatory instance. I am taking the "democratic" approach with the above definition.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-05-22T23:13:15.550Z
Answers.Text: I would be somewhat surprised if there was no official definition- at least the [WFCC](https://www.wfcc.ch/) or similar organizations could be expected to have some definition?
Answers.UserDisplayName: pulsar512b
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-02-28T13:13:02.693Z
Answers.LastActivityDate: 2020-01-24T05:32:37.313Z
Answers.LastEditDate: 2020-01-24T05:32:37.313Z
Answers.UserDisplayName: Benjamin Raabe
Body: <p>Is there a general consensus among composers, players, and/or organizations for what exactly defines an en passant checkmate, and is there any history  to it?</p>
  <p>As far as I know, there are two possibilities to define it by.</p>
  <ol>
  <li><p>The pawn captures, moving to deliver a discovered check that results in checkmate.</p>
  </li>
  <li><p>The pawn captures, and the <em>pawn itself</em> checkmates.</p>
  </li>
  </ol>
  
Tags: <checkmate><history><terminology><en-passant>
Title: What should be defined as an en passant checkmate?
ThreadText: # What should be defined as an en passant checkmate?
  
  (Asked by: username_0 on 2019-02-27)
  
  Is there a general consensus among composers, players, and/or organizations for what exactly defines an en passant checkmate, and is there any history to it?
  
  As far as I know, there are two possibilities to define it by.
  
  1. The pawn captures, moving to deliver a discovered check that results in checkmate.
  2. The pawn captures, and the *pawn itself* checkmates.
  
  **Tags:** checkmate, history, terminology, en-passant
  
  
  ---
  
  ## 2 answers
  
  ### Answer by username_2 on 2019-02-28. Score: 4 | Accepted answer
  
  After some research I could not find any "official" definition by a chess association/federation. This doesn't really surprise me, as there really is no need for a definition of "e.p. checkmate" to ensure correct play.
  
  However the general internet consensus on the usage of the term seems to agree on the following requirements:
  
  * The game has to end with checkmate.
  * The last move has to be played en passant.
  
  An exemplary notated move would be "**29... cxd e.p. #**" (although notating e.p. is optional under the *FIDE laws of chess (C.9)*) - regardless if the pawn capturing delivers check or not. The [Wikipedia examples](https://en.wikipedia.org/wiki/En_passant#Unusual_examples) follow this definition.
  
  As there is no opinion by a regulatory instance about this topic, it seems to be up to you to make up your mind on this topic or bringing it to the attention of said regulatory instance. I am taking the "democratic" approach with the above definition.
  
  > **Comments:**
  > **username_3**: I would be somewhat surprised if there was no official definition- at least the [WFCC](https://www.wfcc.ch/) or similar organizations could be expected to have some definition?  
  
  ---
  
  ### Answer by username_1 on 2019-02-27. Score: 2
  
  I don't think it is defined at all. But in your first case, the pawn is delivering the mate. So I think that would be the 'en passant mate'. The 2nd case is 'just' a discovered mate.
  
  
  ---
  
  