Answers.Body: <p>You already said it: white bishop pair, black king can count holes. Nd5 pinned, has to protect Be7. Ra5 stands silly. All rather small stuff, but it adds up. I'd play Bd3 without thinking (the white squares are atrociously weak), with the intent of Qf5/Qe4 or Be4. Have fun keeping your house of cards together...</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-03-02T15:21:26.503Z
Answers.Text: Seems like the white squares are a big part of it. Move the f6-pawn to f7, and White's advantage almost disappears.
Answers.UserDisplayName: Allure
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-03-01T08:12:36.330Z
Answers.LastActivityDate: 2022-03-01T08:12:36.330Z
Answers.UserDisplayName: Hauke Reddmann
Body: <p>This position comes from <a href="https://tcec-chess.com/#div=l1&amp;game=36&amp;season=22" rel="noreferrer">Koivisto-Rubichess, TCEC Season 22 League 1</a>, after 33...Qc2-Qc6.</p>
  <pre><code>[FEN &quot;6k1/4b1p1/2q2p1p/r2n4/8/5QB1/5PPP/4RBK1 w - - 2 34&quot;]
  </code></pre>
  <ul>
  <li>Material is equal</li>
  <li>White has the bishop pair in an open position, but all the pawns are on the same flank, so the long-range ability of bishops should be less important</li>
  <li>Both kings look reasonably safe</li>
  <li>It's true that Black just moved into a self-pin, but 32...Qc6 was not forced; if the pin is actually an issue Black could simply not have moved the queen there</li>
  </ul>
  <p>Yet Koivisto signaled a +2.4 advantage for White in this position, Rubichess was almost as pessimistic (+1.7), and so is Stockfish (Lichess Stockfish is +1.7 at d=31).</p>
  <p>Where is White's advantage coming from?</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2022-03-01T03:56:21.327Z
Comments.Text: What is Leela's evaluation?
Comments.UserDisplayName: SecretAgentMan
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2022-03-01T04:56:48.107Z
Comments.Text: @SecretAgentMan no idea. If someone with access to Leela can check, I'd be interested. Still, I'd expect Leela to see a large White advantage as well, since White does seem to have a large advantage, with Koivisto converting smoothly.
Comments.UserDisplayName: Allure
Tags: <analysis><endgame>
Title: Why is this position winning for White?
ThreadText: # Why is this position winning for White?
  
  (Asked by: username_0 on 2022-03-01)
  
  This position comes from Koivisto-Rubichess, TCEC Season 22 League 1, after 33...Qc2-Qc6.
  [FEN "6k1/4b1p1/2q2p1p/r2n4/8/5QB1/5PPP/4RBK1 w - - 2 34"]
  
  
  Material is equal
  White has the bishop pair in an open position, but all the pawns are on the same flank, so the long-range ability of bishops should be less important
  Both kings look reasonably safe
  It's true that Black just moved into a self-pin, but 32...Qc6 was not forced; if the pin is actually an issue Black could simply not have moved the queen there
  
  Yet Koivisto signaled a +2.4 advantage for White in this position, Rubichess was almost as pessimistic (+1.7), and so is Stockfish (Lichess Stockfish is +1.7 at d=31).
  Where is White's advantage coming from?
  
  **Tags:** analysis, endgame
  
  > **Comments:**
  > **username_1**: What is Leela's evaluation?  
  > **username_0**: @username_1 no idea. If someone with access to Leela can check, I'd be interested. Still, I'd expect Leela to see a large White advantage as well, since White does seem to have a large advantage, with Koivisto converting smoothly.  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_2 on 2022-03-01. Score: 7 | Accepted answer
  
  You already said it: white bishop pair, black king can count holes. Nd5 pinned, has to protect Be7. Ra5 stands silly. All rather small stuff, but it adds up. I'd play Bd3 without thinking (the white squares are atrociously weak), with the intent of Qf5/Qe4 or Be4. Have fun keeping your house of cards together...
  
  > **Comments:**
  > **username_0**: Seems like the white squares are a big part of it. Move the f6-pawn to f7, and White's advantage almost disappears.  
  
  ---
  
  