Answers.Body: <p>That is a nice problem, with rook and knight mating a king at the edge, with one square blocked. Here's a helpmate problem which shows more examples of that phenomenon:</p>
  
  <pre><code>[Title "Forsberg, Revista Romana de Sah, 1935. h#2. b) bRa6 c) bBa6 d) bNa6 e) bPa6"]
  [StartFlipped "0"]
  [fen "8/8/q7/8/1R4K1/k2N4/8/8 b KQkq - 0 1"]
  
  1... Qf6 2. Nc5 Qb2 3. Ra4#
  </code></pre>
  
  <p>My analysis is based on that by John Nunn, <em>Solving in Style</em>, prob. 133. White's king is too far away to participate in the mating-net (though it is accurately placed to avoid dual solutions). So White must mate with rook and knight alone. Rook and knight can mate, but only if bK is in a corner. With only 2 Black moves, this corner must be a1, but this entails wNc3, which the knight can't reach in two moves. Therefore Black must block one square in bK's field, and this is where the unit on a6 comes in. The 5 choices of unit lead to 5 different mating nets.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2024-01-21T11:00:45.610Z
Answers.Text: How does this answer the question that is being asked? In this example, "Is there a name for this Mate Pattern?"
Answers.UserDisplayName: Dheebs
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2024-01-23T09:37:19.843Z
Answers.Text: @Dheebs from the diagram in the question: 1... Ne3+ 2. Kg1 Rf1# (so not the Anastasia mate). This problem addresses the "or has it occurred before" part of the question.
Answers.UserDisplayName: Glorfindel
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2024-01-24T11:34:04.360Z
Answers.Text: Yep fair cop. Thanks @Glorfindel
Answers.UserDisplayName: Dheebs
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-04-19T08:20:17.903Z
Answers.LastActivityDate: 2019-04-19T10:26:29.457Z
Answers.LastEditDate: 2019-04-19T10:26:29.457Z
Answers.UserDisplayName: Rosie F
Answers.Body: <p>I believe that that is called “Anatasia Mate,” based on <a href="https://en.m.wikipedia.org/wiki/Checkmate_pattern" rel="nofollow noreferrer">Wikipeda's</a> testimony.</p>
  <blockquote>
  <p>In Anastasia's mate, a knight and rook team up to trap the opposing king between the side of the board on one side and a friendly piece on the other. Often, the queen is first sacrificed along the a-file or h-file to achieve the position. This checkmate gets its name from the novel Anastasia und das Schachspiel by Johann Jakob Wilhelm Heinse.</p>
  </blockquote>
  <p>It gives this position as an example of Anatasia mate.</p>
  <pre><code>[FEN &quot;8/4N1pk/8/7R/8/8/8/8 w - - 0 1&quot;]
  </code></pre>
  <p>Now compare it to the checkmate from your game.</p>
  <pre><code>[FEN &quot;5k2/8/1R6/7r/P7/1P2n1PK/7P/8 w - - 0 1&quot;]
  </code></pre>
  <p>Even though the White king has an extra pawn by it, I believe it to be similar enough to call it an Anatasia mate.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-04-19T12:13:02.717Z
Answers.Text: The final position looks like an Anastasia's Mate, although shifted one row from its typical position, and reached by non-traditional means, but from the position originally posted, the game could have ended with two other mates: a back-rank mate assisted by the knight to take away one flight square, or what looks like an Arabian mate shifted one column and assisted by one of the white pawns taking a flight square from its own king.
Answers.UserDisplayName: itub
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-04-19T11:18:19.583Z
Answers.LastActivityDate: 2021-05-02T04:55:40.297Z
Answers.LastEditDate: 2021-05-02T04:55:40.297Z
Answers.UserDisplayName: Rewan Demontay
Answers.Body: <p>Interesting position that can give rise to two different mating patterns:</p>
  <ol>
  <li><p>Anastasia's mate if the king advances to h6
  <a href="https://en.wikipedia.org/wiki/Checkmate_pattern#Anastasia%27s_mate" rel="nofollow noreferrer">https://en.wikipedia.org/wiki/Checkmate_pattern#Anastasia's_mate</a></p>
  </li>
  <li><p>A variation of the Arabian mate if the King retreats to h8 or g8
  <a href="https://en.wikipedia.org/wiki/Checkmate_pattern#Arabian_mate" rel="nofollow noreferrer">https://en.wikipedia.org/wiki/Checkmate_pattern#Arabian_mate</a></p>
  </li>
  </ol>
  <p><a href="https://i.sstatic.net/tJZFX.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/tJZFX.png" alt="enter image description here" /></a></p>
  
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Answers.UserDisplayName: chesshomem
Body: <pre><code>[fen "5k2/8/1R6/5r2/P7/1P4P1/6KP/5n2 b - - 0 40"]
  </code></pre>
  
  <p>With black to move, remarkably it's mate in 2 (at first glance, it looks like black may struggle to even draw).  It occurred in <a href="https://lichess.org/zohTb2tR" rel="noreferrer">a recent LiChess game of mine</a>.  It looks like the kind of position that might occur in a composed puzzle because it contains the precise material required to checkmate.</p>
  
  <p><strong>Question</strong>: Does this knight and rook mating pattern have a name, or has it occurred before?</p>
  
  <p>When there's a mating pattern involving so little material (just the rook and knight, no king), I feel it might be worthwhile studying it in its own right.  The knight and rook could be on multiple other squares and still achieve essentially the same mate.</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2019-04-19T03:11:27.703Z
Comments.Text: Not sure if it has a name, but that is one of the most beautiful mates-in-two I have ever seen! Very nice!
Comments.UserDisplayName: Brandon_J
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-05-02T09:15:51.433Z
Comments.Text: Addendum for further researchs: The other variant after Kb8 is more or less the Arabian mate. A collection of named patterns: https://en.wikipedia.org/wiki/Checkmate_pattern
Comments.UserDisplayName: Hauke Reddmann
Tags: <checkmate><terminology><patterns><rook-and-minor-endgame>
Title: Does this knight and rook mating pattern have a name, or has it occurred before?
ThreadText: # Does this knight and rook mating pattern have a name, or has it occurred before?
  
  (Asked by: username_0 on 2019-04-19)
  
  [fen "5k2/8/1R6/5r2/P7/1P4P1/6KP/5n2 b - - 0 40"]
  
  With black to move, remarkably it's mate in 2 (at first glance, it looks like black may struggle to even draw).  It occurred in a recent LiChess game of mine.  It looks like the kind of position that might occur in a composed puzzle because it contains the precise material required to checkmate.
  Question: Does this knight and rook mating pattern have a name, or has it occurred before?
  When there's a mating pattern involving so little material (just the rook and knight, no king), I feel it might be worthwhile studying it in its own right.  The knight and rook could be on multiple other squares and still achieve essentially the same mate.
  
  **Tags:** checkmate, terminology, patterns, rook-and-minor-endgame
  
  > **Comments:**
  > **username_1**: Not sure if it has a name, but that is one of the most beautiful mates-in-two I have ever seen! Very nice!  
  > **username_2**: Addendum for further researchs: The other variant after Kb8 is more or less the Arabian mate. A collection of named patterns: https://en.wikipedia.org/wiki/Checkmate_pattern  
  
  ---
  
  ## 3 answers
  
  ### Answer by username_3 on 2019-04-19. Score: 2
  
  That is a nice problem, with rook and knight mating a king at the edge, with one square blocked. Here's a helpmate problem which shows more examples of that phenomenon:
  [Title "Forsberg, Revista Romana de Sah, 1935. h#2. b) bRa6 c) bBa6 d) bNa6 e) bPa6"]
  [StartFlipped "0"]
  [fen "8/8/q7/8/1R4K1/k2N4/8/8 b KQkq - 0 1"]
  
  1... Qf6 2. Nc5 Qb2 3. Ra4#
  
  My analysis is based on that by John Nunn, Solving in Style, prob. 133. White's king is too far away to participate in the mating-net (though it is accurately placed to avoid dual solutions). So White must mate with rook and knight alone. Rook and knight can mate, but only if bK is in a corner. With only 2 Black moves, this corner must be a1, but this entails wNc3, which the knight can't reach in two moves. Therefore Black must block one square in bK's field, and this is where the unit on a6 comes in. The 5 choices of unit lead to 5 different mating nets.
  
  > **Comments:**
  > **username_4**: How does this answer the question that is being asked? In this example, "Is there a name for this Mate Pattern?"  
  > **username_5**: @username_4 from the diagram in the question: 1... Ne3+ 2. Kg1 Rf1# (so not the Anastasia mate). This problem addresses the "or has it occurred before" part of the question.  
  > **username_4**: Yep fair cop. Thanks @username_5  
  
  ---
  
  ### Answer by username_6 on 2019-04-19. Score: 2
  
  I believe that that is called “Anatasia Mate,” based on Wikipeda's testimony.
  
  In Anastasia's mate, a knight and rook team up to trap the opposing king between the side of the board on one side and a friendly piece on the other. Often, the queen is first sacrificed along the a-file or h-file to achieve the position. This checkmate gets its name from the novel Anastasia und das Schachspiel by Johann Jakob Wilhelm Heinse.
  
  It gives this position as an example of Anatasia mate.
  [FEN "8/4N1pk/8/7R/8/8/8/8 w - - 0 1"]
  
  Now compare it to the checkmate from your game.
  [FEN "5k2/8/1R6/7r/P7/1P2n1PK/7P/8 w - - 0 1"]
  
  Even though the White king has an extra pawn by it, I believe it to be similar enough to call it an Anatasia mate.
  
  > **Comments:**
  > **username_7**: The final position looks like an Anastasia's Mate, although shifted one row from its typical position, and reached by non-traditional means, but from the position originally posted, the game could have ended with two other mates: a back-rank mate assisted by the knight to take away one flight square, or what looks like an Arabian mate shifted one column and assisted by one of the white pawns taking a flight square from its own king.  
  
  ---
  
  ### Answer by username_8 on 2024-01-21. Score: 0
  
  Interesting position that can give rise to two different mating patterns:
  
  1. Anastasia's mate if the king advances to h6
     [https://en.wikipedia.org/wiki/Checkmate\_pattern#Anastasia's\_mate](https://en.wikipedia.org/wiki/Checkmate_pattern#Anastasia%27s_mate)
  2. A variation of the Arabian mate if the King retreats to h8 or g8
     <https://en.wikipedia.org/wiki/Checkmate_pattern#Arabian_mate>
  
  [![enter image description here](https://i.sstatic.net/tJZFX.png)](https://i.sstatic.net/tJZFX.png)
  
  
  ---
  
  