Answers.Body: <p>Carlsen's <code>26.Kd2</code> is a a blunder because it exposes the White King to a tactic that wins two pawns and gives Black terrific pressure. The tactic is effectively a guarantee of victory for Black:</p>
  
  <pre><code>[FEN "6rr/1k3p2/1pb1p1np/p1p1P2R/2P3R1/2P1B3/P1BK1PP1/8 b - - 0 1"]
  
  1...Nxe5! 2.Rxg8 (2.Rxe5? Rxg4) Nxc4+! {The Knight gets out of danger, with check and an extra pawn--you couldn't ask for anything better!} 3.Kd3 (3.Ke2 Rxg8) Nb2+ 4.Ke2 Rxg8 {Black is now two full pawns ahead, with lots of pressure on the weak g2 pawn and vastly better pawns for the endgame. }
  </code></pre>
  
  <p>The point is that <code>2...Nxc4+</code> wins Black a second free pawn, by virtue of the check against the White King. Without the ability to get the Knight out of danger with check, <code>...Nxe5</code> is not possible (because White could then simply trade Rooks and then recapture the Knight with a winning position).</p>
  
  <hr>
  
  <p>Anand's mistake on <em>his</em> twenty-sixth move was that he missed this tactic, playing <code>26...a4</code> very quickly and allowing Carlsen to correct his mistake by moving his King away from <code>d2</code>.</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2014-11-17T16:44:49.480Z
Answers.LastActivityDate: 2014-11-19T00:35:14.857Z
Answers.LastEditDate: 2014-11-19T00:35:14.857Z
Answers.UserDisplayName: Henry Keiter
Answers.Body: <p>Carlsen's move(26.Kd2) was a blunder because of Anand's practically winning move(26...Nxe5!) which had a discovered attack on the rook on G4(and potential to take on C4). The double blunder occurred when Anand missed this move and played A4 which is a clear blunder when he had another great move available to him.</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2014-11-17T14:26:19.823Z
Answers.Text: So was Carlsen's blunder that he put his King on a square which could be put under attack from c4 and in the process lose 2 pawns?
Answers.UserDisplayName: user4247
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2014-11-17T16:31:54.817Z
Answers.Text: @user4247 that is correct.
Answers.UserDisplayName: NM Wesley Falcao
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2014-11-17T13:53:29.157Z
Answers.LastActivityDate: 2014-11-17T13:53:29.157Z
Answers.UserDisplayName: bucketman
Body: <p>In the Anand vs Carlsen Match 6, why was move 26 a blunder for both players?</p>
  
  <pre><code>[White "Carlsen"]
  [Black "Anand"]
  [FEN "6rr/1k3p2/1pb1p1np/p1p1P2R/2P3R1/2P1B3/P1B2PP1/2K5 w - - 0 1"]
  
  1.Kd2? a4?
  </code></pre>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2014-11-18T04:00:59.170Z
Comments.Text: http://www.thechesswebsite.com/world-chess-championship-game-6-magnus-carlsen-vs-vishy-anand/ <- Excellent in-depth coverage and explanation
Comments.UserDisplayName: Jay Sullivan
Tags: <blunder><carlsen-anand-2014>
Title: Why was move 26 in Carlsen-Anand 2014 WC Game 6 a blunder by both players?
ThreadText: # Why was move 26 in Carlsen-Anand 2014 WC Game 6 a blunder by both players?
  
  (Asked by: username_0 on 2014-11-17)
  
  In the Anand vs Carlsen Match 6, why was move 26 a blunder for both players?
  
  ```
  [White "Carlsen"]
  [Black "Anand"]
  [FEN "6rr/1k3p2/1pb1p1np/p1p1P2R/2P3R1/2P1B3/P1B2PP1/2K5 w - - 0 1"]
  
  1.Kd2? a4?
  
  ```
  
  **Tags:** blunder, carlsen-anand-2014
  
  > **Comments:**
  > **username_1**: http://www.thechesswebsite.com/world-chess-championship-game-6-magnus-carlsen-vs-vishy-anand/ <- Excellent in-depth coverage and explanation  
  
  ---
  
  ## 2 answers
  
  ### Answer by username_2 on 2014-11-17. Score: 15
  
  Carlsen's `26.Kd2` is a a blunder because it exposes the White King to a tactic that wins two pawns and gives Black terrific pressure. The tactic is effectively a guarantee of victory for Black:
  
  ```
  [FEN "6rr/1k3p2/1pb1p1np/p1p1P2R/2P3R1/2P1B3/P1BK1PP1/8 b - - 0 1"]
  
  1...Nxe5! 2.Rxg8 (2.Rxe5? Rxg4) Nxc4+! {The Knight gets out of danger, with check and an extra pawn--you couldn't ask for anything better!} 3.Kd3 (3.Ke2 Rxg8) Nb2+ 4.Ke2 Rxg8 {Black is now two full pawns ahead, with lots of pressure on the weak g2 pawn and vastly better pawns for the endgame. }
  
  ```
  
  The point is that `2...Nxc4+` wins Black a second free pawn, by virtue of the check against the White King. Without the ability to get the Knight out of danger with check, `...Nxe5` is not possible (because White could then simply trade Rooks and then recapture the Knight with a winning position).
  
  ---
  
  Anand's mistake on *his* twenty-sixth move was that he missed this tactic, playing `26...a4` very quickly and allowing Carlsen to correct his mistake by moving his King away from `d2`.
  
  
  ---
  
  ### Answer by username_3 on 2014-11-17. Score: 6
  
  Carlsen's move(26.Kd2) was a blunder because of Anand's practically winning move(26...Nxe5!) which had a discovered attack on the rook on G4(and potential to take on C4). The double blunder occurred when Anand missed this move and played A4 which is a clear blunder when he had another great move available to him.
  
  > **Comments:**
  > **username_0**: So was Carlsen's blunder that he put his King on a square which could be put under attack from c4 and in the process lose 2 pawns?  
  > **username_4**: @username_0 that is correct.  
  
  ---
  
  