Answers.Body: <p>Eric Half-An-Answer: He talks about a fortress, obviously :-) As far as one can talk generally, when trying to storm a fortress in a position with material Q/R plus pawns, the win method often is to use zugzwang to pass with the king through the blockade line built by the rook (here: at the moment the black king can't make it over the 4th) and then attack the pawn basis with the king from below.</p>
  <p>BTW, another common strategy (but I bet it is not applicable here, since White is a pawn up) we just recently saw in a top game is the queen shielding the king with her own life (as taking her would create a passer), for example Kh2 Rh3 Pg2 - Ke4 Qd4 Pf4, where Qe3! wins fastest. Again the idea is attacking the base from below with the king.</p>
  <p>This is only Eric Half-An-Answer as I am too weak a player to &quot;see&quot; the concrete zugzwang position with Qd1. I can make an educated guess: Assuming that the wR is fixed to e4 as Re3 allows the bK to near further, and R?4 runs into a fork (which I don't see yet), Kf2 vs Qd1 is already zugzwang: Ke3 Qe1 and the rook must move, Kg2 Qe1 ditto. Let Stockfish sort that out.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-11-20T09:14:31.517Z
Answers.Text: thanks Hauke Reddmann! i'd have to analyse further into your half-answer. btw is Eric Half-An-Answer referring to...eric hansen?
Answers.UserDisplayName: BCLC
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-11-20T09:18:31.780Z
Answers.Text: btw i know it's related to fortress myb (hence i tagged fortress) because in the video they were talking about 'I don't believe in fortresses' lol (i'll edit post to say this)
Answers.UserDisplayName: BCLC
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-11-20T11:25:27.330Z
Answers.Text: @BCLC: Eric Half-A-Bee, Monty Python.
Answers.UserDisplayName: Hauke Reddmann
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-11-20T08:55:26.830Z
Answers.LastActivityDate: 2021-11-20T08:55:26.830Z
Answers.UserDisplayName: Hauke Reddmann
Body: <p><a href="https://lichess.org/analysis/8/5p2/8/2qkp3/4R1P1/5P2/3KP3/8_b_-_-_0_1#1" rel="nofollow noreferrer">Position</a> that follows is from Anna Rudolf's <a href="https://youtu.be/1E4WvgTYut4?t=477" rel="nofollow noreferrer">video 'Challenging Top Chess Grandmaster Hikaru Nakamura for a Choker Match!'</a>:</p>
  <pre><code>[FEN &quot;8/5p2/8/2qkp3/4R1P1/5P2/3KP3/8 b - - 0 1&quot;]
  </code></pre>
  <p>Also, here's a screenshot:</p>
  <p><a href="https://i.sstatic.net/6XEzx.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/6XEzx.jpg" alt="enter image description here" /></a></p>
  <p>In the game, Anna was running low on time and forced a draw by repetition (there was no draw offer button at the time and maybe even now).</p>
  <ol>
  <li>How does Anna beat Hikaru? I tried checking out lichess and it seems an idea is to trade rook and pawn for queen but even though it's 2 pawn vs 2 pawns, the pawn endgame is winning for black (Anna). Below is what I got from the 1st time I pressed spacebar until the pawn endgame. (At higher depth, I didn't get this again.)</li>
  </ol>
  <hr />
  <pre><code>[FEN &quot;8/5p2/8/2qkp3/4R1P1/5P2/3KP3/8 b - - 0 1&quot;]
  
  1... Qa7 2. Ke1 Qg1+ 3. Kd2 Qb1 4. Ke3 Qc2 5. Kf2 Qxe4 6. fxe4+ Kxe4
  </code></pre>
  <hr />
  <ol start="2">
  <li>Hikaru says something about 'zugzwang with Qd1'. What is Hikaru talking about? I know it's possibly related to fortresses (hence i tagged fortress) because in the video they were talking about '<a href="https://twitter.com/gmhikaru/status/1063544866213429248" rel="nofollow noreferrer">I don't believe in fortresses</a>' lol</li>
  </ol>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-11-20T17:17:46.930Z
Comments.Text: Again, Choker isn't really relevant here as the setup phase is already over, you want standard chess endgame expertise.
Comments.UserDisplayName: Mobeus Zoom
Tags: <endgame><zugzwang><fortress><choker><queen-and-rook-endgame>
Title: How does Anna Rudolf beat Hikaru Nakamura in this rook vs queen endgame fortress that came from a choker game (chess + poker)?
ThreadText: # How does Anna Rudolf beat Hikaru Nakamura in this rook vs queen endgame fortress that came from a choker game (chess + poker)?
  
  (Asked by: username_0 on 2021-11-20)
  
  Position that follows is from Anna Rudolf's video 'Challenging Top Chess Grandmaster Hikaru Nakamura for a Choker Match!':
  [FEN "8/5p2/8/2qkp3/4R1P1/5P2/3KP3/8 b - - 0 1"]
  
  Also, here's a screenshot:
  
  In the game, Anna was running low on time and forced a draw by repetition (there was no draw offer button at the time and maybe even now).
  
  How does Anna beat Hikaru? I tried checking out lichess and it seems an idea is to trade rook and pawn for queen but even though it's 2 pawn vs 2 pawns, the pawn endgame is winning for black (Anna). Below is what I got from the 1st time I pressed spacebar until the pawn endgame. (At higher depth, I didn't get this again.)
  
  
  [FEN "8/5p2/8/2qkp3/4R1P1/5P2/3KP3/8 b - - 0 1"]
  
  1... Qa7 2. Ke1 Qg1+ 3. Kd2 Qb1 4. Ke3 Qc2 5. Kf2 Qxe4 6. fxe4+ Kxe4
  
  
  
  Hikaru says something about 'zugzwang with Qd1'. What is Hikaru talking about? I know it's possibly related to fortresses (hence i tagged fortress) because in the video they were talking about 'I don't believe in fortresses' lol
  
  **Tags:** endgame, zugzwang, fortress, choker, queen-and-rook-endgame
  
  > **Comments:**
  > **username_1**: Again, Choker isn't really relevant here as the setup phase is already over, you want standard chess endgame expertise.  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_2 on 2021-11-20. Score: 3
  
  Eric Half-An-Answer: He talks about a fortress, obviously :-) As far as one can talk generally, when trying to storm a fortress in a position with material Q/R plus pawns, the win method often is to use zugzwang to pass with the king through the blockade line built by the rook (here: at the moment the black king can't make it over the 4th) and then attack the pawn basis with the king from below.
  
  BTW, another common strategy (but I bet it is not applicable here, since White is a pawn up) we just recently saw in a top game is the queen shielding the king with her own life (as taking her would create a passer), for example Kh2 Rh3 Pg2 - Ke4 Qd4 Pf4, where Qe3! wins fastest. Again the idea is attacking the base from below with the king.
  
  This is only Eric Half-An-Answer as I am too weak a player to "see" the concrete zugzwang position with Qd1. I can make an educated guess: Assuming that the wR is fixed to e4 as Re3 allows the bK to near further, and R?4 runs into a fork (which I don't see yet), Kf2 vs Qd1 is already zugzwang: Ke3 Qe1 and the rook must move, Kg2 Qe1 ditto. Let Stockfish sort that out.
  
  > **Comments:**
  > **username_0**: thanks username_2! i'd have to analyse further into your half-answer. btw is Eric Half-An-Answer referring to...eric hansen?  
  > **username_0**: btw i know it's related to fortress myb (hence i tagged fortress) because in the video they were talking about 'I don't believe in fortresses' lol (i'll edit post to say this)  
  > **username_2**: @username_0: Eric Half-A-Bee, Monty Python.  
  
  ---
  
  