Answers.Body: <p>3...f5 is not a very good move, but it's not a terrible one; there's no immediate refutation. White's best response (verified with the chess program Houdini) is probably to deal with the pressure on his e-pawn by playing 4.exf5 Bxf5 (4.d3 would be passive; 4.Nc3 fxe4 5.Nxe4 d5 gives Black a nice center), then continue to develop, say with 5.Nc3 (covering e4 so that fxe5 is a real threat; if 5.fxe5 dxe5 6.Nxe5 now then 6...Qh4+ 7.g3 Qe4+ double-attacking the knight and rook). White's position is more pleasant but Black is certainly not lost.</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2013-03-30T14:09:35.480Z
Answers.LastActivityDate: 2013-03-30T14:09:35.480Z
Answers.UserDisplayName: dfan
Body: <p>I've read about many of the basic variations of the KGD, e.g. <a href="http://en.wikipedia.org/wiki/King%27s_Gambit#King.27s_Gambit_Declined">these</a> but none of of them mention the following from Black. This suggests to me that this move may be a mistake from black that I could take advantage of, but I see nowhere good for white to go from here.</p>
  
  <p>What should white play next?</p>
  
  <pre><code>[fen "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"]
  
  1. e4 e5 2.f4 d6 3. Nf3 f5 
  </code></pre>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2013-05-01T01:38:50.317Z
Comments.Text: Just pointing out, if you want something similar to chew on, that the line you give shares a spirit with the Philidor Counter Gambit, `1.e4 e5 2.Nf3 d6 3.d4 f5`, which was the original idea behind the Philidor Defense: http://en.wikipedia.org/wiki/Philidor_Defence#Philidor.27s_original_intention:_3...f5
Comments.UserDisplayName: ETD
Tags: <opening><kings-gambit>
Title: How to counter 3. Nf3 f5 in the King's Gambit Declined
ThreadText: # How to counter 3. Nf3 f5 in the King's Gambit Declined
  
  (Asked by: username_0 on 2013-03-30)
  
  I've read about many of the basic variations of the KGD, e.g. [these](http://en.wikipedia.org/wiki/King%27s_Gambit#King.27s_Gambit_Declined) but none of of them mention the following from Black. This suggests to me that this move may be a mistake from black that I could take advantage of, but I see nowhere good for white to go from here.
  
  What should white play next?
  
  ```
  [fen "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"]
  
  1. e4 e5 2.f4 d6 3. Nf3 f5 
  
  ```
  
  **Tags:** opening, kings-gambit
  
  > **Comments:**
  > **username_1**: Just pointing out, if you want something similar to chew on, that the line you give shares a spirit with the Philidor Counter Gambit, `1.e4 e5 2.Nf3 d6 3.d4 f5`, which was the original idea behind the Philidor Defense: http://en.wikipedia.org/wiki/Philidor_Defence#Philidor.27s_original_intention:_3...f5  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_2 on 2013-03-30. Score: 3 | Accepted answer
  
  3...f5 is not a very good move, but it's not a terrible one; there's no immediate refutation. White's best response (verified with the chess program Houdini) is probably to deal with the pressure on his e-pawn by playing 4.exf5 Bxf5 (4.d3 would be passive; 4.Nc3 fxe4 5.Nxe4 d5 gives Black a nice center), then continue to develop, say with 5.Nc3 (covering e4 so that fxe5 is a real threat; if 5.fxe5 dxe5 6.Nxe5 now then 6...Qh4+ 7.g3 Qe4+ double-attacking the knight and rook). White's position is more pleasant but Black is certainly not lost.
  
  
  ---
  
  