Answers.Body: <p>The best I could find:</p>
  <ul>
  <li>Former World Champion Emanuel <a href="https://en.wikipedia.org/wiki/Emanuel_Lasker" rel="nofollow noreferrer">Lasker</a> at 67 years, 8 months, 1 day <a href="https://www.chessgames.com/perl/chessgame?gid=1008303" rel="nofollow noreferrer">defeating</a> Max Euwe in Nottingham (1936).</li>
  </ul>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2023-03-25T05:46:51.270Z
Answers.LastActivityDate: 2023-03-27T13:41:23.043Z
Answers.LastEditDate: 2023-03-27T13:41:23.043Z
Answers.UserDisplayName: voidpointer
Body: <p>Per title. I'm interested in all time controls. This record isn't in the Wikipedia <a href="https://en.wikipedia.org/wiki/List_of_world_records_in_chess#Age-related_records" rel="noreferrer">list of Chess records</a>.</p>
  <p>Related: <a href="https://chess.stackexchange.com/questions/41393/youngest-player-to-beat-a-reigning-world-champion">Youngest Player to beat a reigning World Champion?</a> which asks for the youngest player.</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2023-02-13T06:02:27.600Z
Comments.Text: [classical, rapid, blitz but only regular open chess not women's, women's WFRCC or open WFRCC right?](https://chess.stackexchange.com/questions/33832/what-are-all-the-world-chess-championships-such-that)
Comments.UserDisplayName: BCLC
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2023-02-13T06:53:13.843Z
Comments.Text: Yeah, the question is about the world champion, not the women's world champion (although that could be a natural follow-up question).
Comments.UserDisplayName: Allure
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2023-02-15T20:19:24.633Z
Comments.Text: Start with Korchnoi and then work yourself up (in age) :-)
Comments.UserDisplayName: Hauke Reddmann
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2023-02-15T20:28:32.237Z
Comments.Text: Specifically, my best search result [age 63] was https://www.chessgames.com/perl/chessgame?gid=1038811
Comments.UserDisplayName: Hauke Reddmann
Tags: <records><world-championship><trivia>
Title: Who is the oldest player ever to beat a reigning world champion?
ThreadText: # Who is the oldest player ever to beat a reigning world champion?
  
  (Asked by: username_0 on 2023-02-13)
  
  Per title. I'm interested in all time controls. This record isn't in the Wikipedia [list of Chess records](https://en.wikipedia.org/wiki/List_of_world_records_in_chess#Age-related_records).
  
  Related: [Youngest Player to beat a reigning World Champion?](https://chess.stackexchange.com/questions/41393/youngest-player-to-beat-a-reigning-world-champion) which asks for the youngest player.
  
  **Tags:** records, world-championship, trivia
  
  > **Comments:**
  > **username_1**: [classical, rapid, blitz but only regular open chess not women's, women's WFRCC or open WFRCC right?](https://chess.stackexchange.com/questions/33832/what-are-all-the-world-chess-championships-such-that)  
  > **username_0**: Yeah, the question is about the world champion, not the women's world champion (although that could be a natural follow-up question).  
  > **username_2**: Start with Korchnoi and then work yourself up (in age) :-)  
  > **username_2**: Specifically, my best search result [age 63] was https://www.chessgames.com/perl/chessgame?gid=1038811  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_3 on 2023-03-25. Score: 5 | Accepted answer
  
  The best I could find:
  
  * Former World Champion Emanuel [Lasker](https://en.wikipedia.org/wiki/Emanuel_Lasker) at 67 years, 8 months, 1 day [defeating](https://www.chessgames.com/perl/chessgame?gid=1008303) Max Euwe in Nottingham (1936).
  
  
  ---
  
  