Answers.Body: <blockquote>
    <p>Why is the engine evaluating against bringing more attackers in this
    position?</p>
  </blockquote>
  
  <p>That's not what it is doing. It is evaluating against blundering a draw. After Rb8 your queen has nowhere to go apart from allowing a repetition. If you play Qxa6 you are just a piece and a pawn up for no compensation.</p>
  
  <pre><code>[FEN "r2qk2r/pQpbbppp/n2p1n2/3Pp3/4P3/2N1BN2/PPP2PPP/R3KB1R w KQkq - 0 1"]
  
  1. Bxa6 (1. Qxa6) Rb8 2. Qxa7 Ra8 3. Qb7 Rb8=
  </code></pre>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-04-26T12:51:00.397Z
Answers.Text: While 10.Bxa6 is a clear blunder, it doesn't technically blunder into a draw. After 10...Rb8 11.Qxa7 Ra8 12.Qb7 Rb8 13.Qb3 Rxb3 14.axb3, Stockfish gives White an advantage.
Answers.UserDisplayName: Inertial Ignorance
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-04-21T13:39:25.723Z
Answers.LastActivityDate: 2020-04-21T13:39:25.723Z
Answers.UserDisplayName: Brian Towers
Body: <pre><code>[FEN "r2qk2r/pQpbbppp/n2p1n2/3Pp3/4P3/2N1BN2/PPP2PPP/R3KB1R w KQkq - 0 1"]
  </code></pre>
  
  <p>This position is evaluated at +6.4l but if I capture with the Bishop <em>(Bxa6)</em> it drops down to +0.8. </p>
  
  <p>Why does the evaluation drop when I make that move?</p>
  
  <pre><code>[Title "AKP2002-moisturiser, 600+5 Rated Rapid game, lichess.org, 4/21/2020"]
  [FEN ""]
  
  1. e4 e5 2. Nf3 Nc6 3. d4 d6 4. d5 Nb8 5. Nc3 Bg4 6. Be3 Nf6 7. Qd3 Be7 8. Qb5+ Bd7 9. Qxb7 Na6 10. Bxa6 Qb8 11. Qxb8+ Rxb8 12. O-O-O c6 13. Ng5 cxd5 14. exd5 Nxd5 15. Nxd5 Bf6 16. Nc7+ Kf8 17. Ne4 Bd8 18. Nd5 Bc6 19. Bxa7 Ra8 20. Bb8 Rxa6 21. Bxd6+ Ke8 22. Nc7+ Bxc7 23. Bxc7 Ke7 24. Bd6+ Ke6 25. Nc5+ Kf5 26. Nxa6 Rc8 27. Rhe1 Re8 28. Nc7 Rd8 1-0
  </code></pre>
  
  <p>Why isn’t capturing with the Bishop good, since it brings more attackers into play, and is hence better move?</p>
  
Tags: <engines><candidate-move>
Title: Why is the engine evaluating against bringing more attackers in this position?
ThreadText: # Why is the engine evaluating against bringing more attackers in this position?
  
  (Asked by: username_0 on 2020-04-21)
  
  ```
  [FEN "r2qk2r/pQpbbppp/n2p1n2/3Pp3/4P3/2N1BN2/PPP2PPP/R3KB1R w KQkq - 0 1"]
  
  ```
  
  This position is evaluated at +6.4l but if I capture with the Bishop *(Bxa6)* it drops down to +0.8.
  
  Why does the evaluation drop when I make that move?
  
  ```
  [Title "username_0-moisturiser, 600+5 Rated Rapid game, lichess.org, 4/21/2020"]
  [FEN ""]
  
  1. e4 e5 2. Nf3 Nc6 3. d4 d6 4. d5 Nb8 5. Nc3 Bg4 6. Be3 Nf6 7. Qd3 Be7 8. Qb5+ Bd7 9. Qxb7 Na6 10. Bxa6 Qb8 11. Qxb8+ Rxb8 12. O-O-O c6 13. Ng5 cxd5 14. exd5 Nxd5 15. Nxd5 Bf6 16. Nc7+ Kf8 17. Ne4 Bd8 18. Nd5 Bc6 19. Bxa7 Ra8 20. Bb8 Rxa6 21. Bxd6+ Ke8 22. Nc7+ Bxc7 23. Bxc7 Ke7 24. Bd6+ Ke6 25. Nc5+ Kf5 26. Nxa6 Rc8 27. Rhe1 Re8 28. Nc7 Rd8 1-0
  
  ```
  
  Why isn’t capturing with the Bishop good, since it brings more attackers into play, and is hence better move?
  
  **Tags:** engines, candidate-move
  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2020-04-21. Score: 7 | Accepted answer
  
  > Why is the engine evaluating against bringing more attackers in this
  > position?
  
  That's not what it is doing. It is evaluating against blundering a draw. After Rb8 your queen has nowhere to go apart from allowing a repetition. If you play Qxa6 you are just a piece and a pawn up for no compensation.
  
  ```
  [FEN "r2qk2r/pQpbbppp/n2p1n2/3Pp3/4P3/2N1BN2/PPP2PPP/R3KB1R w KQkq - 0 1"]
  
  1. Bxa6 (1. Qxa6) Rb8 2. Qxa7 Ra8 3. Qb7 Rb8=
  
  ```
  
  > **Comments:**
  > **username_2**: While 10.Bxa6 is a clear blunder, it doesn't technically blunder into a draw. After 10...Rb8 11.Qxa7 Ra8 12.Qb7 Rb8 13.Qb3 Rxb3 14.axb3, Stockfish gives White an advantage.  
  
  ---
  
  