Answers.Body: <p>No, there is <strong>no possible checkmate</strong> with 2 (or more) same-coloured bishops against a bare king. The game is drawn immediately.</p>
  <p>Indeed, if White has light-squared bishops then:</p>
  <ul>
  <li>when the black king stand on a dark square, it cannot be attacked</li>
  <li>when the black king stand on a light square, it can be attacked but there are at least two adjacent dark squares (more if it isn't in a corner), of which the white king can only deny one : Black is in check but not in checkmate and the king escapes.</li>
  </ul>
  <p>For example, in the position (the most White can get) White: Kc2, Bf4, Bc5 / Black Ka1 :</p>
  <p>1.Be5 is check but a2 is not controlled: 1...Ka2 and the game is a draw.</p>
  <p>If you add a Black pawn, a checkmate pattern become possible. However, it takes 5 bishops (!) in <a href="https://www.youtube.com/watch?v=nvZa7sRbjho" rel="nofollow noreferrer">this</a> study by Alexei Troitsky (thanks to @HaukeReddmann for the reference) for White to be able to force a checkmate !</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2023-07-04T15:31:38.630Z
Answers.Text: To clarify, the game is drawn because the opposing king can always stay on the opposite color squares as the bishops, and the other king isn't enough to force anything.
Answers.UserDisplayName: qwr
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2023-07-05T09:55:41.250Z
Answers.Text: @Evergalo: The study is not by Loyd, but Troitsky. (https://www.youtube.com/watch?v=nvZa7sRbjho) Just FYI. Also, please extend the answer (e.g. "a mated bK must be checked by a wB, but even in the corner it has two flights of the other color which the wK can't control") as I'm tempted to edit that in :-)
Answers.UserDisplayName: Hauke Reddmann
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Answers.CreationDate: 2023-07-04T11:44:09.670Z
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Answers.LastEditDate: 2023-07-05T10:35:09.693Z
Answers.UserDisplayName: Evargalo
Body: <p>Is it possible to checkmate King with two bishops of same colour in the endgame?.</p>
  <p>Is it possible in Chess to get this position in reality?</p>
  <p>Position:</p>
  <p>King with Two bishops of same colour V/S King.</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2023-07-04T15:29:01.403Z
Comments.Text: The only way to get two bishops of the same color is via underpromotion.
Comments.UserDisplayName: qwr
Tags: <endgame><bishops><kings>
Title: Checkmate with two bishops of same colour
ThreadText: # Checkmate with two bishops of same colour
  
  (Asked by: username_0 on 2023-07-04)
  
  Is it possible to checkmate King with two bishops of same colour in the endgame?.
  
  Is it possible in Chess to get this position in reality?
  
  Position:
  
  King with Two bishops of same colour V/S King.
  
  **Tags:** endgame, bishops, kings
  
  > **Comments:**
  > **username_1**: The only way to get two bishops of the same color is via underpromotion.  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_2 on 2023-07-04. Score: 3 | Accepted answer
  
  No, there is **no possible checkmate** with 2 (or more) same-coloured bishops against a bare king. The game is drawn immediately.
  
  Indeed, if White has light-squared bishops then:
  
  * when the black king stand on a dark square, it cannot be attacked
  * when the black king stand on a light square, it can be attacked but there are at least two adjacent dark squares (more if it isn't in a corner), of which the white king can only deny one : Black is in check but not in checkmate and the king escapes.
  
  For example, in the position (the most White can get) White: Kc2, Bf4, Bc5 / Black Ka1 :
  
  1.Be5 is check but a2 is not controlled: 1...Ka2 and the game is a draw.
  
  If you add a Black pawn, a checkmate pattern become possible. However, it takes 5 bishops (!) in [this](https://www.youtube.com/watch?v=nvZa7sRbjho) study by Alexei Troitsky (thanks to @HaukeReddmann for the reference) for White to be able to force a checkmate !
  
  > **Comments:**
  > **username_1**: To clarify, the game is drawn because the opposing king can always stay on the opposite color squares as the bishops, and the other king isn't enough to force anything.  
  > **username_3**: @Evergalo: The study is not by Loyd, but Troitsky. (https://www.youtube.com/watch?v=nvZa7sRbjho) Just FYI. Also, please extend the answer (e.g. "a mated bK must be checked by a wB, but even in the corner it has two flights of the other color which the wK can't control") as I'm tempted to edit that in :-)  
  
  ---
  
  