Body: <p>I am Black and my opponent is White. Here the computer recommends Rxd4, which I have done (the rook captured bishop here).</p>
  <pre><code>[FEN &quot;4r1k1/1pp2pp1/p6p/4q3/P2rPn2/2P1QP1P/1P4P1/R4RK1 w - - 0 1&quot;]
  </code></pre>
  <p>It's obvious then that Qxd4 is a blunder, because then I play Ne2 to fork the king and queen and the game is over. I would expect the computer to play cxd4 here to go up material, but the computer plays Rfe1.</p>
  <p>Why not cxd4 here? What future sequence am I not seeing?</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-02-14T20:00:16.213Z
Comments.Text: @koedem: I think your instinct is right, I would only check a second if White has anything (Rf2, Qf2, Qd2 - nope, the only move is Kf2, but then Qxg2 followed by Qxb2, curtains.) Qg5 is usually a motive against an undefended Qd2, but here it works wonders too.
Comments.UserDisplayName: Hauke Reddmann
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-01-13T22:13:09.160Z
Comments.Text: My first instinct would be cxd4 Qg5, threatening Qxg2# and Nxh3+ (the latter winning the queen). Not computer checked though.
Comments.UserDisplayName: koedem
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-01-13T22:21:23.213Z
Comments.Text: I checked SF12 and it thinks cxd is best for White. Still lost after ...Qg5 though
Comments.UserDisplayName: B.Swan
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-01-15T14:40:11.847Z
Comments.Text: SF12 is the open source engine Stockfish.
Comments.UserDisplayName: Timo
Tags: <analysis><computer-chess>
Title: Why does white not play cxd4 here?
ThreadText: # Why does white not play cxd4 here?
  
  (Asked by: username_0 on 2021-01-13)
  
  I am Black and my opponent is White. Here the computer recommends Rxd4, which I have done (the rook captured bishop here).
  
  ```
  [FEN "4r1k1/1pp2pp1/p6p/4q3/P2rPn2/2P1QP1P/1P4P1/R4RK1 w - - 0 1"]
  
  ```
  
  It's obvious then that Qxd4 is a blunder, because then I play Ne2 to fork the king and queen and the game is over. I would expect the computer to play cxd4 here to go up material, but the computer plays Rfe1.
  
  Why not cxd4 here? What future sequence am I not seeing?
  
  **Tags:** analysis, computer-chess
  
  > **Comments:**
  > **username_2**: My first instinct would be cxd4 Qg5, threatening Qxg2# and Nxh3+ (the latter winning the queen). Not computer checked though.  
  > **username_3**: I checked SF12 and it thinks cxd is best for White. Still lost after ...Qg5 though  
  > **username_4**: SF12 is the open source engine Stockfish.  
  > **username_1**: @username_2: I think your instinct is right, I would only check a second if White has anything (Rf2, Qf2, Qd2 - nope, the only move is Kf2, but then Qxg2 followed by Qxb2, curtains.) Qg5 is usually a motive against an undefended Qd2, but here it works wonders too.  
  
  ---
  
  ## 0 answers
  
  