Answers.Body: <p>8 solutions</p>
  <ol>
  <li>Bf4#</li>
  <li>Nf7#</li>
  <li>Rd6#</li>
  <li>Ng8#</li>
  <li>Nf5#</li>
  <li>Rb6#</li>
  <li>Rh5#</li>
  <li>Qe6#</li>
  </ol>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2023-03-19T18:26:42.590Z
Answers.Text: Tks for you answer but I dont get how it can mate the black king...
Answers.UserDisplayName: Xavier Labouze
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2023-03-18T10:35:26.663Z
Answers.LastActivityDate: 2023-03-18T10:35:26.663Z
Answers.UserDisplayName: dimitris
Answers.Body: <p>Your post is perfectly fine here, my friend. Chess problems and puzzles are on-topic here, and we do need more. All kinds of all sorts are welcome. We just need to bring them here!</p>
  <p>I think that out of the 14 open squares on the board, only:</p>
  <blockquote class="spoiler">
  <p> placing the Black king on both a6 works!</p>
  </blockquote>
  <p>This is because placement on the squares:</p>
  <blockquote class="spoiler">
  <p> a1, a2, a8, a4, b1, c1, c4, d1, d2, e1, e2,  f1, f6, f8, g1, and h6 all result in an illegal position. This is due to the fact that Black either has no last legal move if it is White's turn, or it would've been impossible for the Black king to get around the current White pawn structure. Thus, they are not options at all. This explains the &quot;retrograde-analysis&quot; tag.</p>
  </blockquote>
  <p>Therefore, remaining the square works:</p>
  <blockquote class="spoiler">
  <p> with the solution checkmate being 1. Rd6#.</p>
  </blockquote>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-11-18T03:38:25.420Z
Answers.LastActivityDate: 2020-11-25T16:47:18.493Z
Answers.LastEditDate: 2020-11-25T16:47:18.493Z
Answers.UserDisplayName: Rewan Demontay
Body: <p>The post &quot;<a href="https://chess.stackexchange.com/questions/32845/a-mysterious-mate-in-one">A mysterious mate in one</a>&quot; made me think of one of my last problems which is also a Mate-in-One with no black King:</p>
  <pre><code>    [Title &quot;White to move and mate in one&quot;]
      [FEN &quot;1B1NB2K/P2RN3/8/1R6/1P5P/4P2Q/1PP2PP1/8 w KQkq - 0 1&quot;]
  </code></pre>
  <p>All the white pieces are there but none of the black ones.<br />
  White (at the bottom) to move.<br />
  The position is legal, except that the Black King (and the Black King only) is not displayed. Find it - there is but one place.<br />
  Mate in one.</p>
  
Tags: <checkmate><problems><puzzles><retrograde-analysis>
Title: Mate in One the Missing King
ThreadText: # Mate in One the Missing King
  
  (Asked by: username_0 on 2020-11-17)
  
  The post "[A mysterious mate in one](https://chess.stackexchange.com/questions/32845/a-mysterious-mate-in-one)" made me think of one of my last problems which is also a Mate-in-One with no black King:
  
  ```
      [Title "White to move and mate in one"]
      [FEN "1B1NB2K/P2RN3/8/1R6/1P5P/4P2Q/1PP2PP1/8 w KQkq - 0 1"]
  
  ```
  
  All the white pieces are there but none of the black ones.  
  White (at the bottom) to move.  
  The position is legal, except that the Black King (and the Black King only) is not displayed. Find it - there is but one place.  
  Mate in one.
  
  **Tags:** checkmate, problems, puzzles, retrograde-analysis
  
  
  ---
  
  ## 2 answers
  
  ### Answer by username_2 on 2020-11-18. Score: 8 | Accepted answer
  
  Your post is perfectly fine here, my friend. Chess problems and puzzles are on-topic here, and we do need more. All kinds of all sorts are welcome. We just need to bring them here!
  
  I think that out of the 14 open squares on the board, only:
  
  > placing the Black king on both a6 works!
  
  This is because placement on the squares:
  
  > a1, a2, a8, a4, b1, c1, c4, d1, d2, e1, e2, f1, f6, f8, g1, and h6 all result in an illegal position. This is due to the fact that Black either has no last legal move if it is White's turn, or it would've been impossible for the Black king to get around the current White pawn structure. Thus, they are not options at all. This explains the "retrograde-analysis" tag.
  
  Therefore, remaining the square works:
  
  > with the solution checkmate being 1. Rd6#.
  
  
  ---
  
  ### Answer by username_1 on 2023-03-18. Score: -1
  
  8 solutions
  
  1. Bf4#
  2. Nf7#
  3. Rd6#
  4. Ng8#
  5. Nf5#
  6. Rb6#
  7. Rh5#
  8. Qe6#
  
  > **Comments:**
  > **username_0**: Tks for you answer but I dont get how it can mate the black king...  
  
  ---
  
  