Answers.Body: <p>In the context of professional chess, something like Norway Chess (by invitation) or qualifiers would be &quot;not open&quot;. So any event where there is no fixed number of entrants would be &quot;open&quot;, which is typically most Swiss events (some may impose an upper limit due to space/safety considerations). It is also possible to have both open section and &quot;not open&quot; section in the same event.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2024-06-03T15:12:21.937Z
Answers.LastActivityDate: 2024-06-03T15:12:21.937Z
Answers.UserDisplayName: prusswan
Body: <p>I used to think an open tournament was by definition open to everyone who was willing to pay the entry costs, but it is clear that some &quot;Open&quot; tournaments are not.</p>
  <p>So what is the definition?</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2024-06-03T13:23:57.597Z
Comments.Text: i thought open is for any age group, any gender. maybe some restrictions on ratings
Comments.UserDisplayName: cmgchess
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2024-06-03T13:28:22.903Z
Comments.Text: @cmgchess but there are women opens.
Comments.UserDisplayName: Ian Ringrose
Tags: <tournament>
Title: What define a tournament as a "Open"
ThreadText: # What define a tournament as a "Open"
  
  (Asked by: username_0 on 2024-06-03)
  
  I used to think an open tournament was by definition open to everyone who was willing to pay the entry costs, but it is clear that some "Open" tournaments are not.
  
  So what is the definition?
  
  **Tags:** tournament
  
  > **Comments:**
  > **username_1**: i thought open is for any age group, any gender. maybe some restrictions on ratings  
  > **username_0**: @username_1 but there are women opens.  
  
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  ## 1 answers
  
  ### Answer by username_2 on 2024-06-03. Score: 1
  
  In the context of professional chess, something like Norway Chess (by invitation) or qualifiers would be "not open". So any event where there is no fixed number of entrants would be "open", which is typically most Swiss events (some may impose an upper limit due to space/safety considerations). It is also possible to have both open section and "not open" section in the same event.
  
  
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