Answers.Body: <p>This is a familiar tactic I often get to use myself in another opening line. If black plays <code>1... Rf8</code>, then comes <code>2. Bc7! Qe8 3. Nd6 Bxd6 4. Bxd6</code> and black loses the exchange anyway.</p>
  
  <pre><code>[Title "White to move"]
  [FEN "r1bqr1k1/pp1nbpp1/4pn1p/2pp4/2PP1B2/P1NBPN2/1P3PPP/R2Q1RK1 w - - 0 1"]
  
  1. Nb5 Rf8 2. Bc7! Qe8 3. Nd6 Bxd6 4. Bxd6
  </code></pre>
  
  <p>Chess is about patterns. Since I was familiar with the pattern, I spotted this tactic immediately.   </p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2015-09-23T15:36:48.463Z
Answers.Text: Thanks, this is a wonderful answer. It is interesting how threatening to fork the Rooks allows you to guarantee a Rook capture even when the fork is supposedly evaded. This is something I've seen in Chess often, where there is some sort of balance of power that maintains unless one blunders.
Answers.UserDisplayName: AturSams
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2015-09-21T21:19:18.920Z
Answers.LastActivityDate: 2015-09-22T17:16:10.380Z
Answers.LastEditDate: 2015-09-22T17:16:10.380Z
Answers.UserDisplayName: Dag Oskar Madsen
Body: <p>Taken from:</p>
  
  <p><a href="https://www.chesscademy.com/exercises/a-subtle-blunder" rel="nofollow noreferrer">Chess Academy: A subtle blunder</a></p>
  
  <pre><code>[Title "White to move"]
  [FEN "r1bqr1k1/pp1nbpp1/4pn1p/2pp4/2PP1B2/P1NBPN2/1P3PPP/R2Q1RK1 w - - 0 1"]
  </code></pre>
  
  <p>White can play Nb5 followed by Nc7 but wouldn't Black play Rf8 beforehand?</p>
  
Tags: <puzzles>
Title: Why is Nb5 a strong move here? Why is there a guaranteed material gain?
ThreadText: # Why is Nb5 a strong move here? Why is there a guaranteed material gain?
  
  (Asked by: username_0 on 2015-09-21)
  
  Taken from:
  Chess Academy: A subtle blunder
  [Title "White to move"]
  [FEN "r1bqr1k1/pp1nbpp1/4pn1p/2pp4/2PP1B2/P1NBPN2/1P3PPP/R2Q1RK1 w - - 0 1"]
  
  White can play Nb5 followed by Nc7 but wouldn't Black play Rf8 beforehand?
  
  **Tags:** puzzles
  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2015-09-21. Score: 17 | Accepted answer
  
  This is a familiar tactic I often get to use myself in another opening line. If black plays 1... Rf8, then comes 2. Bc7! Qe8 3. Nd6 Bxd6 4. Bxd6 and black loses the exchange anyway.
  [Title "White to move"]
  [FEN "r1bqr1k1/pp1nbpp1/4pn1p/2pp4/2PP1B2/P1NBPN2/1P3PPP/R2Q1RK1 w - - 0 1"]
  
  1. Nb5 Rf8 2. Bc7! Qe8 3. Nd6 Bxd6 4. Bxd6
  
  Chess is about patterns. Since I was familiar with the pattern, I spotted this tactic immediately.
  
  > **Comments:**
  > **username_0**: Thanks, this is a wonderful answer. It is interesting how threatening to fork the Rooks allows you to guarantee a Rook capture even when the fork is supposedly evaded. This is something I've seen in Chess often, where there is some sort of balance of power that maintains unless one blunders.  
  
  ---
  
  