user15223: 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?

user11144: 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...

15223: <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>
 11144: <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>
