Answers.Body: <p>This position is example 7.57 on page 285 - chapter ROOK VS MINOR PIECE(S): <strong>R. Dautov - T. Heinemann</strong> <em>German Ch. (Bremen) 1998</em>. I was able to find that game online <a href="https://old.chesstempo.com/gamedb/game/930657" rel="nofollow noreferrer">on Chess Tempo</a> and <a href="https://lichess.org/2JKQx86n/black" rel="nofollow noreferrer">on Lichess</a>:</p>
  <pre><code>[Event &quot;70th ch-GER&quot;]
  [Site &quot;Bremen GER&quot;]
  [Round &quot;9&quot;]
  [Date &quot;1998.11.14&quot;]
  [White &quot;Dautov, Rustem&quot;]
  [Black &quot;Heinemann, Thies&quot;]
  [WhiteElo &quot;2625&quot;]
  [BlackElo &quot;2495&quot;]
  [Result &quot;1-0&quot;]
  [FEN &quot;rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1&quot;]
  [StartPly &quot;85&quot;]
  
  1.d4 Nf6 2.c4 c5 3.d5 b5 4.Nf3 bxc4 5.Nc3 d6 6.e4 g6 7.Bxc4 Bg7 8.e5 dxe5 9.Nxe5 O-O 10.O-O Ne8 11.Re1 Nd6 12.b3 Qc7 13.Bf4 Nd7 14.Nxd7 Qxd7 15.Be5 Rb8 16.Qe2 Bxe5 17.Qxe5 Rb4 18.Ne4 Nxc4 19.bxc4 Rxc4 20.d6 Rxe4 21.Qxe4 exd6 22.Rad1 Bb7 23.Qe7 Qc6 24.f3 d5 25.Rb1 Bc8 26.Qxa7 c4 27.Qd4 Be6 28.Rb6 Qc7 29.a4 Rc8 30.a5 Qa7 31.Ra1 c3 32.Rb4 Qa6 33.Qb6 Qd3 34.Qd4 Qa6 35.Rb3 Qc4 36.Qxc4 Rxc4 37.a6 c2 38.a7 c1=Q+ 39.Rxc1 Rxc1+ 40.Kf2 Ra1 41.Rb8+ Kg7 42.a8=Q Rxa8 43.Rxa8 h5 44.Ke3 Kf6 45.Kd4 Kf5 46.g3 Kf6 47.Ra3 Kf5 48.Re3 Kf6 49.Re5 Ke7 50.Kc5 Kd7 51.Re3 Ke7 52.Rd3 Kf6 53.Kd6 Kf5 54.Rd4 g5 55.h4 Kf6 56.hxg5+ Kxg5 57.Ke5 Kg6 58.Rb4 Kg7 59.Rb8 d4 60.Kxd4 Ba2 61.Ke5 Bc4 62.Kf5 Bd5 63.f4 Bf3 64.Rb6 Bg4+ 65.Kg5 Bf3 66.f5 Bg4 67.f6+ Kh7 68.Rb7 Be6 69.Kxh5 Bd5 70.Rb4  1-0
  </code></pre>
  <p>The example, according to the book, demonstrates the difficulties a bishop faces in general (even with an extra pawn!) against a rook. After 43... h5!? 44. Ke3 Kf6 45. Kd4 Kf5?! 46. g3 Nf6, the book analyzes some variations that could occur if 46... h4!? was played.</p>
  <p>55. h4! is the finishing touch: it creates more weaknesses on the dark squares. Black has lost.</p>
  <hr />
  <p>While it might be feasible for an engine to draw (playing black), it's almost impossible for a human to make no mistakes, as these positions are too tricky. The more the pawns on both sides the greater the superiority of the rook and the better the chances to win.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-12-18T19:42:19.380Z
Answers.LastActivityDate: 2021-12-18T19:42:19.380Z
Answers.UserDisplayName: double-beep
Body: <p>Karsten Müller and Lamprecht give the following ending as a win in Fundamental Chess Ending. However, Houdini 6.02 does not find a win as far as I analyzed.</p>
  <pre><code>[FEN &quot;R7/5pkp/4b1p1/3p4/8/5P2/5KPP/8 b - - 0 1&quot;]
  [startflipped &quot;&quot;]
  </code></pre>
  <p>What happens with perfect play?</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-06-29T01:12:04.757Z
Comments.Text: I get +1.13 with stockfish 13 47 ply.  What does it say in the book about why this is a win?
Comments.UserDisplayName: Michael West
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-06-29T08:20:46.547Z
Comments.Text: My feeling is that this should be a win with best play. V.Eingorn studies a similar ending in *Decision-Making in Chess", I will try to build an answer from it once I have checked the book.
Comments.UserDisplayName: Evargalo
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-06-29T11:45:52.510Z
Comments.Text: Could you provide more information on both the book's and the engine's evaluations of this position?
Comments.UserDisplayName: David
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-06-29T13:04:26.213Z
Comments.Text: engine evaluation here is irrelevant. If the book claims it's a win, it should present a winning plan, or idea(s). You could try to execute this plan and if it's really working, at some point even an engine should be able to understand it.
Comments.UserDisplayName: sleepy
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-12-13T20:20:28.017Z
Comments.Text: @sleepy you do realize that only computers can play a chess game to near perfectly unlike humans. So the answer to this question has to use a computer to answer it.
Comments.UserDisplayName: Varun W.
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-12-20T15:35:23.943Z
Comments.Text: I did  two iterations of Houdini 6.02 at d = 44 and then at even d=46. It ends in a six men tablebase ending winning for White(mate in 64).
Comments.UserDisplayName: Stefano
Tags: <engines><analysis><endgame>
Title: A classical Rook vs Bishop endgame (with pawns)
ThreadText: # A classical Rook vs Bishop endgame (with pawns)
  
  (Asked by: username_0 on 2021-06-28)
  
  Karsten Müller and Lamprecht give the following ending as a win in Fundamental Chess Ending. However, Houdini 6.02 does not find a win as far as I analyzed.
  
  ```
  [FEN "R7/5pkp/4b1p1/3p4/8/5P2/5KPP/8 b - - 0 1"]
  [startflipped ""]
  
  ```
  
  What happens with perfect play?
  
  **Tags:** engines, analysis, endgame
  
  > **Comments:**
  > **username_1**: I get +1.13 with stockfish 13 47 ply.  What does it say in the book about why this is a win?  
  > **username_2**: My feeling is that this should be a win with best play. V.Eingorn studies a similar ending in *Decision-Making in Chess", I will try to build an answer from it once I have checked the book.  
  > **username_3**: Could you provide more information on both the book's and the engine's evaluations of this position?  
  > **username_4**: engine evaluation here is irrelevant. If the book claims it's a win, it should present a winning plan, or idea(s). You could try to execute this plan and if it's really working, at some point even an engine should be able to understand it.  
  > **username_5**: @username_4 you do realize that only computers can play a chess game to near perfectly unlike humans. So the answer to this question has to use a computer to answer it.  
  > **username_6**: I did  two iterations of Houdini 6.02 at d = 44 and then at even d=46. It ends in a six men tablebase ending winning for White(mate in 64).  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_7 on 2021-12-18. Score: 3
  
  This position is example 7.57 on page 285 - chapter ROOK VS MINOR PIECE(S): **R. Dautov - T. Heinemann** *German Ch. (Bremen) 1998*. I was able to find that game online [on Chess Tempo](https://old.chesstempo.com/gamedb/game/930657) and [on Lichess](https://lichess.org/2JKQx86n/black):
  
  ```
  [Event "70th ch-GER"]
  [Site "Bremen GER"]
  [Round "9"]
  [Date "1998.11.14"]
  [White "Dautov, Rustem"]
  [Black "Heinemann, Thies"]
  [WhiteElo "2625"]
  [BlackElo "2495"]
  [Result "1-0"]
  [FEN "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"]
  [StartPly "85"]
  
  1.d4 Nf6 2.c4 c5 3.d5 b5 4.Nf3 bxc4 5.Nc3 d6 6.e4 g6 7.Bxc4 Bg7 8.e5 dxe5 9.Nxe5 O-O 10.O-O Ne8 11.Re1 Nd6 12.b3 Qc7 13.Bf4 Nd7 14.Nxd7 Qxd7 15.Be5 Rb8 16.Qe2 Bxe5 17.Qxe5 Rb4 18.Ne4 Nxc4 19.bxc4 Rxc4 20.d6 Rxe4 21.Qxe4 exd6 22.Rad1 Bb7 23.Qe7 Qc6 24.f3 d5 25.Rb1 Bc8 26.Qxa7 c4 27.Qd4 Be6 28.Rb6 Qc7 29.a4 Rc8 30.a5 Qa7 31.Ra1 c3 32.Rb4 Qa6 33.Qb6 Qd3 34.Qd4 Qa6 35.Rb3 Qc4 36.Qxc4 Rxc4 37.a6 c2 38.a7 c1=Q+ 39.Rxc1 Rxc1+ 40.Kf2 Ra1 41.Rb8+ Kg7 42.a8=Q Rxa8 43.Rxa8 h5 44.Ke3 Kf6 45.Kd4 Kf5 46.g3 Kf6 47.Ra3 Kf5 48.Re3 Kf6 49.Re5 Ke7 50.Kc5 Kd7 51.Re3 Ke7 52.Rd3 Kf6 53.Kd6 Kf5 54.Rd4 g5 55.h4 Kf6 56.hxg5+ Kxg5 57.Ke5 Kg6 58.Rb4 Kg7 59.Rb8 d4 60.Kxd4 Ba2 61.Ke5 Bc4 62.Kf5 Bd5 63.f4 Bf3 64.Rb6 Bg4+ 65.Kg5 Bf3 66.f5 Bg4 67.f6+ Kh7 68.Rb7 Be6 69.Kxh5 Bd5 70.Rb4  1-0
  
  ```
  
  The example, according to the book, demonstrates the difficulties a bishop faces in general (even with an extra pawn!) against a rook. After 43... h5!? 44. Ke3 Kf6 45. Kd4 Kf5?! 46. g3 Nf6, the book analyzes some variations that could occur if 46... h4!? was played.
  
  55. h4! is the finishing touch: it creates more weaknesses on the dark squares. Black has lost.
  
  ---
  
  While it might be feasible for an engine to draw (playing black), it's almost impossible for a human to make no mistakes, as these positions are too tricky. The more the pawns on both sides the greater the superiority of the rook and the better the chances to win.
  
  
  ---
  
  