Answers.Body: <p>Given the hint of the same key move in both problems, I've systematically worked out all the various options for the solutions of both. </p>
  
  <p>In the king on e4 problem, the solutions are:</p>
  
  <p>1. Bc4 Ke5  2. Qd5+ Kf6  3. Qg5#.  If 1. ... Kf5  2. Qf3+ Kg6  3. Qf7#. If 2... Ke5 in this line, 3. Qf4#.  Alternately, 1... Kf5 2. Qh5+ Ke4  3. Qd5#.  If 2... Kf6 in this line, 3. Qg5#   </p>
  
  <p>In the king on e5 problem, the solutions are:</p>
  
  <p>1. Bc4 Ke4  2. Qd5#  or 1... Kf5  2. Qh5+ Ke4  3. Qd5#  or 1... Kf6 2. Qd6+ Kf5  3. Qe6#  or finally, if 2... Kg7 in this latter line, 3. Qh6#.       </p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-10-22T19:51:17.613Z
Answers.LastActivityDate: 2019-08-28T13:56:17.520Z
Answers.LastEditDate: 2019-08-28T13:56:17.520Z
Answers.UserDisplayName: CConero
Answers.Body: <p>You can find this chess problem </p>
  
  <pre><code>[FEN "8/8/8/8/4k3/8/8/2BQKB2 w - - 0 1"]
  </code></pre>
  
  <p>on page 582 of Pal Benko's book "My Life, Games and Compositions" 2003 ISBN:1-890085-08-1 which also states it was first published in "Chess life" in 1968, so <strong>ChessBase</strong> is correct.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-10-14T18:45:29.150Z
Answers.LastActivityDate: 2018-10-14T18:45:29.150Z
Answers.UserDisplayName: Pavel Nefyodov
Body: <p>In Christian Hesse's book <i>The Joy of Chess</i> one reads about a mate-in-3 problem composed by Pál Benkö that stumped Bobby Fischer.  Hesse gives the following diagram:</p>
  
  <pre><code>[FEN "8/8/8/4k3/8/8/8/2BQKB2 w - - 0 1"]
  </code></pre>
  
  <p>On the other hand, on <a href="https://en.chessbase.com/post/easter-puzzles-by-benko-a-world-champion-challenge" rel="noreferrer">ChessBase</a> a slightly different diagram is given:</p>
  
  <pre><code>[FEN "8/8/8/8/4k3/8/8/2BQKB2 w - - 0 1"]
  </code></pre>
  
  <p>Curiously, both of these positions are valid three-movers with the same key move!  But which one is Benkö's actual composition?</p>
  
Tags: <history><problems>
Title: Benko's three-mover that stumped Fischer
ThreadText: # Benko's three-mover that stumped Fischer
  
  (Asked by: username_0 on 2018-10-14)
  
  In Christian Hesse's book *The Joy of Chess* one reads about a mate-in-3 problem composed by Pál Benkö that stumped Bobby Fischer. Hesse gives the following diagram:
  
  ```
  [FEN "8/8/8/4k3/8/8/8/2BQKB2 w - - 0 1"]
  
  ```
  
  On the other hand, on [ChessBase](https://en.chessbase.com/post/easter-puzzles-by-benko-a-world-champion-challenge) a slightly different diagram is given:
  
  ```
  [FEN "8/8/8/8/4k3/8/8/2BQKB2 w - - 0 1"]
  
  ```
  
  Curiously, both of these positions are valid three-movers with the same key move! But which one is Benkö's actual composition?
  
  **Tags:** history, problems
  
  
  ---
  
  ## 2 answers
  
  ### Answer by username_2 on 2018-10-14. Score: 11 | Accepted answer
  
  You can find this chess problem
  
  ```
  [FEN "8/8/8/8/4k3/8/8/2BQKB2 w - - 0 1"]
  
  ```
  
  on page 582 of Pal Benko's book "My Life, Games and Compositions" 2003 ISBN:1-890085-08-1 which also states it was first published in "Chess life" in 1968, so **ChessBase** is correct.
  
  
  ---
  
  ### Answer by username_1 on 2018-10-22. Score: 4
  
  Given the hint of the same key move in both problems, I've systematically worked out all the various options for the solutions of both.
  
  In the king on e4 problem, the solutions are:
  
  1. Bc4 Ke5 2. Qd5+ Kf6 3. Qg5#. If 1. ... Kf5 2. Qf3+ Kg6 3. Qf7#. If 2... Ke5 in this line, 3. Qf4#. Alternately, 1... Kf5 2. Qh5+ Ke4 3. Qd5#. If 2... Kf6 in this line, 3. Qg5#
  
  In the king on e5 problem, the solutions are:
  
  1. Bc4 Ke4 2. Qd5# or 1... Kf5 2. Qh5+ Ke4 3. Qd5# or 1... Kf6 2. Qd6+ Kf5 3. Qe6# or finally, if 2... Kg7 in this latter line, 3. Qh6#.
  
  
  ---
  
  