Answers.Body: <p>The longest KQQ-K mate whilst maintaining optimality is a <a href="http://www.gilith.com/chess/endgames/kqq_k.html" rel="nofollow noreferrer">mate in 4</a>.</p>
  <pre><code>[FEN &quot;8/8/8/3k4/8/5K2/8/4Q2Q w - - 0 1&quot;]
  </code></pre>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-08-10T07:35:59.487Z
Answers.Text: Wouldn't 1... Kd4 give one more movement to the black?
Answers.UserDisplayName: fedorqui
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-08-10T08:07:36.767Z
Answers.Text: @fedorqui, in that case, 2. Qc7 (Kd5 3. Qe4#) (Kd3 3. Qe3#) mate in 3.
Answers.UserDisplayName: justhalf
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-11-12T16:36:34.403Z
Answers.Text: Yes, this seems right. I played a lot in an analysis board and couldn't find a position which requires mate in 5.
Answers.UserDisplayName: Daniel Alfredo Sottile
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Answers.CreationDate: 2020-08-09T13:21:53.407Z
Answers.LastActivityDate: 2021-11-09T19:02:54.140Z
Answers.LastEditDate: 2021-11-09T19:02:54.140Z
Answers.UserDisplayName: TheSimpliFire
Body: <p>On the board, there are 2 queens (of the same color) placed on random squares. The opposing side has only a king, placed on a random square (and not in check). There obviously exists a mating sequence. What is the biggest possible 'n' such that there is a forced Mate in 'n'? In other words, given the above situation, what is the upper bound on the minimum number of moves required to give a checkmate?</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-08-09T10:37:14.257Z
Comments.Text: I don't have an answer to your question but I have a comment that may be relevant to your research. This link has mate in 2 puzzles with two queens vs a lone king: https://www.apronus.com/chess/puzzles/mate-in-2/?KQQvK
Comments.UserDisplayName: MichalRyszardWojcik
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-08-09T12:41:59.520Z
Comments.Text: "There obviously exists a mating sequence." Except for stalemates.
Comments.UserDisplayName: TheSimpliFire
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-08-10T01:58:31.237Z
Comments.Text: @TheSimpliFire The solution to that is not to stalemate.
Comments.UserDisplayName: Comic Sans Seraphim
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-08-11T03:54:06.087Z
Comments.Text: @You'rebadandshouldfeelbad I think the stalemate comment was intended to point out the possibility that the "random" starting position in the question might be stalemate.
Comments.UserDisplayName: Andreas Blass
Tags: <checkmate><problems><queens>
Title: Forced mate: 2 queens vs king
ThreadText: # Forced mate: 2 queens vs king
  
  (Asked by: username_0 on 2020-08-09)
  
  On the board, there are 2 queens (of the same color) placed on random squares. The opposing side has only a king, placed on a random square (and not in check). There obviously exists a mating sequence. What is the biggest possible 'n' such that there is a forced Mate in 'n'? In other words, given the above situation, what is the upper bound on the minimum number of moves required to give a checkmate?
  
  **Tags:** checkmate, problems, queens
  
  > **Comments:**
  > **username_1**: I don't have an answer to your question but I have a comment that may be relevant to your research. This link has mate in 2 puzzles with two queens vs a lone king: https://www.apronus.com/chess/puzzles/mate-in-2/?KQQvK  
  > **username_2**: "There obviously exists a mating sequence." Except for stalemates.  
  > **username_3**: @username_2 The solution to that is not to stalemate.  
  > **username_4**: @You'rebadandshouldfeelbad I think the stalemate comment was intended to point out the possibility that the "random" starting position in the question might be stalemate.  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_2 on 2020-08-09. Score: 14
  
  The longest KQQ-K mate whilst maintaining optimality is a [mate in 4](http://www.gilith.com/chess/endgames/kqq_k.html).
  
  ```
  [FEN "8/8/8/3k4/8/5K2/8/4Q2Q w - - 0 1"]
  
  ```
  
  > **Comments:**
  > **username_5**: Wouldn't 1... Kd4 give one more movement to the black?  
  > **username_6**: @username_5, in that case, 2. Qc7 (Kd5 3. Qe4#) (Kd3 3. Qe3#) mate in 3.  
  > **username_7**: Yes, this seems right. I played a lot in an analysis board and couldn't find a position which requires mate in 5.  
  
  ---
  
  