Answers.Body: <p>I don't know if the engine was really playing at 1400+, but it was quite weak. 1400+ rating sounds fair to me.</p>
  
  <p>Please note:</p>
  
  <ul>
  <li>Shredder is <strong>not</strong> the iPhone app you mention. It's rating system is not the same as what Shredder is using.</li>
  <li>The iOS app you mention is definitely under-rated. I tried it several times, I know.</li>
  </ul>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-12-01T06:00:16.233Z
Answers.LastActivityDate: 2018-12-01T06:00:16.233Z
Answers.UserDisplayName: SmallChess
Body: <p>I am using Deep Shredder 13 and somewhat struggled with the engine at 1400. I then managed to defeat 1425 with great ease. The game went as follows</p>
  
  <pre><code>[FEN ""]    
      1. d4   e6
          2. Bf4  Nf6 
          3. Nf3  d6 
          4. Nc3  h6  
          5. e4   g5
          6. Bg3  d5 
          7. e5   Ne4  
          8. Qd3  f5 
          9. h4   Nd7  
          10. hxg5  Nxg5  
          11. Nxg5  Qxg5 
          12. f4    Qg8 
          13. O-O-O h5 
          14. Bh4  Bh6 
          15. g3   Qf7 
          16. Nb5  Nf8 
          17. Qc3  Rg8  
          18. Nxc7+  Kd7 
          19. Nxa8 Qh7  
          20. Qc7+ Ke8 
          21. Qd8+ Kf7 
          22. Qe7+ Kg6
          23. Qf6# 
  </code></pre>
  
  <p>Thus, this brings me to question whether I am actually playing against a 1425 rating. On my <a href="https://itunes.apple.com/us/app/chess-pro-ultimate-edition/id561435724?mt=8" rel="nofollow noreferrer">iphone app</a> I struggle with a 1350, thus I am unsure what to make of this. During the game, I saw obvious threats (<code>Nb5xc7+</code>) which could've been avoided. The engine instead of avoiding mate with <code>Qxc7</code>, it went for the dubious move <code>Kd7</code>. Afterwards, when I added a new variation, it actually went with <code>Qxc7</code>. Why does this occur? I mean it seems as if I was playing against a 1300 rating. What is the logic behind this? (Also, I should add that during the game the engine was limited to book knowledge)</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2018-12-01T05:48:29.040Z
Comments.Text: It is a problem with how chess engines in general handicap themselves strength wise to achieve that rating. They will basically play normally, and then purposefully make a move that even a beginner probably wouldn't make. Whomever figures out how to make a chess engine play like a believable amateur is probably going to make some decent money.
Comments.UserDisplayName: Jerry Snitselaar
Tags: <engines><learning><rating>
Title: Am I actually playing against a 1425 rated player?
ThreadText: # Am I actually playing against a 1425 rated player?
  
  (Asked by: username_0 on 2018-12-01)
  
  I am using Deep Shredder 13 and somewhat struggled with the engine at 1400. I then managed to defeat 1425 with great ease. The game went as follows
  [FEN ""]    
      1. d4   e6
          2. Bf4  Nf6 
          3. Nf3  d6 
          4. Nc3  h6  
          5. e4   g5
          6. Bg3  d5 
          7. e5   Ne4  
          8. Qd3  f5 
          9. h4   Nd7  
          10. hxg5  Nxg5  
          11. Nxg5  Qxg5 
          12. f4    Qg8 
          13. O-O-O h5 
          14. Bh4  Bh6 
          15. g3   Qf7 
          16. Nb5  Nf8 
          17. Qc3  Rg8  
          18. Nxc7+  Kd7 
          19. Nxa8 Qh7  
          20. Qc7+ Ke8 
          21. Qd8+ Kf7 
          22. Qe7+ Kg6
          23. Qf6# 
  
  Thus, this brings me to question whether I am actually playing against a 1425 rating. On my iphone app I struggle with a 1350, thus I am unsure what to make of this. During the game, I saw obvious threats (Nb5xc7+) which could've been avoided. The engine instead of avoiding mate with Qxc7, it went for the dubious move Kd7. Afterwards, when I added a new variation, it actually went with Qxc7. Why does this occur? I mean it seems as if I was playing against a 1300 rating. What is the logic behind this? (Also, I should add that during the game the engine was limited to book knowledge)
  
  **Tags:** engines, learning, rating
  
  > **Comments:**
  > **username_1**: It is a problem with how chess engines in general handicap themselves strength wise to achieve that rating. They will basically play normally, and then purposefully make a move that even a beginner probably wouldn't make. Whomever figures out how to make a chess engine play like a believable amateur is probably going to make some decent money.  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_2 on 2018-12-01. Score: 1
  
  I don't know if the engine was really playing at 1400+, but it was quite weak. 1400+ rating sounds fair to me.
  
  Please note:
  
  * Shredder is **not** the iPhone app you mention. It's rating system is not the same as what Shredder is using.
  * The iOS app you mention is definitely under-rated. I tried it several times, I know.
  
  
  ---
  
  