Answers.Body: <p>It's a silly trick.  The board is upside-down!  The bottom left square is h8, and the top right is a1.  A legal move for white (but not a mate in 1) would be <code>1. e8=Q</code>.  Look at it upside-down for a minute, readjust your perception of which squares are controlled by pawns, and you'll soon find a mate in 1.</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2015-02-14T14:56:05.167Z
Answers.Text: That may be the 'solution' but the board is clearly marked with a-h and 1-8. Thus, the board is *not* upside down. If this is the solution then what we have here is really a _chess variant_. At that point, anything could be possible since we don't, and can't, know the variant's rules.
Answers.UserDisplayName: Tony Ennis
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Answers.CreationDate: 2015-05-28T19:08:13.560Z
Answers.Text: @TonyEnnis: I think that the question asker made that diagram (the caption talks about "my friend") so the diagram may be wrong in this respect.
Answers.UserDisplayName: RemcoGerlich
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2015-11-03T03:27:29.163Z
Answers.Text: That would not be mate - Black plays Kxd4
Answers.UserDisplayName: M.M
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-10-31T16:25:46.337Z
Answers.Text: But 1.Rd5# would indeed be mate.
Answers.UserDisplayName: Evargalo
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-11-05T11:46:39.257Z
Answers.Text: Um, I was trying to explain the method of solving the problem without actually giving away the answer!  @Evargolo, would you mind editing your comment to remove the "spoiler"?
Answers.UserDisplayName: Alexander Hanysz
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2015-01-31T08:46:08.730Z
Answers.LastActivityDate: 2015-02-14T12:48:32.893Z
Answers.LastEditDate: 2015-02-14T12:48:32.893Z
Answers.UserDisplayName: Alexander Hanysz
Answers.Body: <p>Essentially, for mate in one, white needs to give check and guard e5. If the Q checks on b2, this opens c5 and d3 for the black K. If the Q checks on c3 or e4, it can be captured. If the Re5 checks on e4 or d5, it can be captured. </p>
  
  <p>There is no mate in one.</p>
  
  <hr>
  
  <p>However, now I look at this again, I can see that it might be the <em>wording of the question</em> that is wrong. White can certainly <strong>end</strong> the game in one move. f4, Kf4, Kf5, Rbf4 and any non-checking move by the Re5 will end the game.</p>
  
  <p>In stalemate.</p>
  
  <p>So you might say, by a trick of phrasing, that's a kind of "mate in the next move".</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2015-01-19T22:27:11.810Z
Answers.LastActivityDate: 2015-05-28T00:07:50.063Z
Answers.LastEditDate: 2015-05-28T00:07:50.063Z
Answers.UserDisplayName: Joffan
Answers.Body: <p>There is no mate in one move here, as there is 9 (Txb4+, Txd5+, Te4+, Dc5+, Dc4+, Dc3+, Dd3+, De4+, Db2+) way to do check black king but none of them gives mate.</p>
  
  <p>Also it could be very interesting to find some example where Rybka or Houdini (or others...) can miss a mate in one.</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2015-01-19T12:19:47.207Z
Answers.Text: I thought the same. But he's sure of it :o [ may be he's just wrong ]
Answers.UserDisplayName: Magesh Kumaar
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Answers.CreationDate: 2015-01-19T12:19:00.757Z
Answers.LastActivityDate: 2015-01-19T12:19:00.757Z
Answers.UserDisplayName: Tanj
Answers.Body: <p>There is no mate in the next move but very good move is Qd1!
  You always may use online tools to calculate next move.
  For example <a href="http://www.chessnextmove.com" rel="nofollow">http://www.chessnextmove.com</a></p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2015-10-22T15:03:18.843Z
Answers.LastActivityDate: 2015-10-22T15:03:18.843Z
Answers.UserDisplayName: Stepan Le
Body: <p>My friend claims that there is a mate in the next move. White to move and checkmate. I am aware of 3 mates in 2 variations:</p>
  
  <pre><code>1. Qd1 Kd3 2.Rxd5#
  
  1. Qd1 Kc5 2.Qg1#
  
  1. Qd1 Kxe5 2.d4#
  </code></pre>
  
  <p>But I cannot seem to find a mate in one move!</p>
  
  <p>I ran it through Houdini and Rybka, both spat out the above variations.</p>
  
  <p>I am aware that the engines dont normally miss these mate in 1 moves, still He seems to be sure (maybe he's wrong). Just want some 'experts' to confirm this.</p>
  
  <p><img src="https://i.sstatic.net/LWD1e.png" alt="enter image description here"></p>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2015-01-19T13:19:55.247Z
Comments.Text: I don't know what your friend got wrong, but `1. Qd1!` is a really nice move.
Comments.UserDisplayName: Dag Oskar Madsen
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2015-01-19T14:36:12.190Z
Comments.Text: He seems to be so sure ! He says - `"Magesh Kumaar There is a single move to checkmate black. Eliminate all other factors, and the one which remains must be the truth"`
Comments.UserDisplayName: Magesh Kumaar
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2015-01-20T13:23:59.573Z
Comments.Text: Maybe by "single move" he means "only a single move works", not "the sequence ending in checkmate is a single move"?
Comments.UserDisplayName: dfan
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2015-02-14T15:40:50.617Z
Comments.Text: Chess engines NEVER miss mate-in-1. If a chess engine doesn't find it it's not there.
Comments.UserDisplayName: BarrySW19
Tags: <analysis><checkmate>
Title: Is there a checkmate in the next move?
ThreadText: # Is there a checkmate in the next move?
  
  (Asked by: username_0 on 2015-01-19)
  
  My friend claims that there is a mate in the next move. White to move and checkmate. I am aware of 3 mates in 2 variations:
  1. Qd1 Kd3 2.Rxd5#
  
  1. Qd1 Kc5 2.Qg1#
  
  1. Qd1 Kxe5 2.d4#
  
  But I cannot seem to find a mate in one move!
  I ran it through Houdini and Rybka, both spat out the above variations.
  I am aware that the engines dont normally miss these mate in 1 moves, still He seems to be sure (maybe he's wrong). Just want some 'experts' to confirm this.
  
  **Tags:** analysis, checkmate
  
  > **Comments:**
  > **username_1**: I don't know what your friend got wrong, but `1. Qd1!` is a really nice move.  
  > **username_0**: He seems to be so sure ! He says - `"username_0 There is a single move to checkmate black. Eliminate all other factors, and the one which remains must be the truth"`  
  > **username_2**: Maybe by "single move" he means "only a single move works", not "the sequence ending in checkmate is a single move"?  
  > **username_3**: Chess engines NEVER miss mate-in-1. If a chess engine doesn't find it it's not there.  
  
  ---
  
  ## 4 answers
  
  ### Answer by username_4 on 2015-01-31. Score: 10
  
  It's a silly trick. The board is upside-down! The bottom left square is h8, and the top right is a1. A legal move for white (but not a mate in 1) would be `1. e8=Q`. Look at it upside-down for a minute, readjust your perception of which squares are controlled by pawns, and you'll soon find a mate in 1.
  
  > **Comments:**
  > **username_5**: That may be the 'solution' but the board is clearly marked with a-h and 1-8. Thus, the board is *not* upside down. If this is the solution then what we have here is really a _chess variant_. At that point, anything could be possible since we don't, and can't, know the variant's rules.  
  > **username_6**: @TonyEnnis: I think that the question asker made that diagram (the caption talks about "my friend") so the diagram may be wrong in this respect.  
  > **username_7**: That would not be mate - Black plays Kxd4  
  > **username_8**: But 1.Rd5# would indeed be mate.  
  > **username_4**: Um, I was trying to explain the method of solving the problem without actually giving away the answer!  @Evargolo, would you mind editing your comment to remove the "spoiler"?  
  
  ---
  
  ### Answer by username_9 on 2015-01-19. Score: 6
  
  Essentially, for mate in one, white needs to give check and guard e5. If the Q checks on b2, this opens c5 and d3 for the black K. If the Q checks on c3 or e4, it can be captured. If the Re5 checks on e4 or d5, it can be captured.
  
  There is no mate in one.
  
  ---
  
  However, now I look at this again, I can see that it might be the *wording of the question* that is wrong. White can certainly **end** the game in one move. f4, Kf4, Kf5, Rbf4 and any non-checking move by the Re5 will end the game.
  
  In stalemate.
  
  So you might say, by a trick of phrasing, that's a kind of "mate in the next move".
  
  
  ---
  
  ### Answer by username_10 on 2015-01-19. Score: 3
  
  There is no mate in one move here, as there is 9 (Txb4+, Txd5+, Te4+, Dc5+, Dc4+, Dc3+, Dd3+, De4+, Db2+) way to do check black king but none of them gives mate.
  
  Also it could be very interesting to find some example where Rybka or Houdini (or others...) can miss a mate in one.
  
  > **Comments:**
  > **username_0**: I thought the same. But he's sure of it :o [ may be he's just wrong ]  
  
  ---
  
  ### Answer by username_11 on 2015-10-22. Score: 1
  
  There is no mate in the next move but very good move is Qd1!
  You always may use online tools to calculate next move.
  For example <http://www.chessnextmove.com>
  
  
  ---
  
  