Answers.Body: <p>There is also one line in the Modern, which pretty much matches your setup:</p>
  <pre><code>[FEN &quot;rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1&quot;]
  
  1. e4 g6 2. d4 Bg7 3. Nc3 c5 4. dxc5 Qa5 5. Bd2 Qxc5 6. Nd5 Nf6?? {for instance, there are several moves losing the queen. The main move seems to be 6. ..Na6} 7. Bb4 Qc6 8. Bb5
  </code></pre>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-12-05T22:52:20.103Z
Answers.LastActivityDate: 2021-12-05T22:52:20.103Z
Answers.UserDisplayName: Keba
Answers.Body: <p>Adding to Philip's answer, I more remember it from the Scandinavian, because there the bQ gets out early anyway and it takes much less patzer moves to irreversibly trap it this way. Example:</p>
  <pre><code>[FEN &quot;rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1&quot;]
  
  1.e4 d5 2.exd5 Qxd5 3.Nc3 Qe5+ {or Qe6+, still 70 games up to here on Lichess} 4.Be2 Qf6? 5.Nd5!? Qc6?? 6.Bb5! 1-0
  </code></pre>
  <p>For a definite answer, the move/board pattern &quot;Nd5 Qc6 Bb5&quot; should be searchable (at least with Costeff's CQL tool).</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-11-08T09:31:13.357Z
Answers.LastActivityDate: 2021-11-09T08:33:58.993Z
Answers.LastEditDate: 2021-11-09T08:33:58.993Z
Answers.UserDisplayName: Hauke Reddmann
Answers.Body: <p>A configuration of pieces like this can occur in many Sicilian sidelines, or with colors reversed in the English. For example 1. e4 c5 2.Nf3  Nc6 3.Bb5 g6 4.Nc3 Qb6 5.Nd5, or 1.c4 e5 2.Nc3 Bb4 3.Qb3 Nc6 4.g3 Nd4. I am not aware that it has a name, or is even of much importance. Although the Knight makes a slightly surprizing advance that seems to gain a tempo, the opponent can just retreat the Queen to her original square and then drive the Knight back with their e-Pawn. Nobody gains or loses anything. There can be an exception if one of the e-Pawns has alredy made a double jump, in which case the Queen move would be a oversight.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-11-08T00:06:56.317Z
Answers.LastActivityDate: 2021-11-08T00:06:56.317Z
Answers.UserDisplayName: Philip Roe
Body: <p>The sequence of moves for White is Nd5, Bb4, and then Bb5, capturing the queen by a fork. The pattern should look something like the below position. I remember that I've seen this trap in some opening, but I can not remember which is it. It is probably some Sicilian sideline.</p>
  <pre><code>[FEN &quot;rnb1kbnr/pp2pppp/2q5/1B1N4/1B6/8/PPPPPPPP/R2QK1NR w KQkq - 0 1&quot;]
  </code></pre>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-11-07T22:34:53.857Z
Comments.Text: I vaguely recognize this from some lines in the open sicilian, but I doubt that black's queen is on c6. I find it much more likely that black's queen is on b6 and that white moves Nd5.
Comments.UserDisplayName: Scounged
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-11-08T07:56:32.680Z
Comments.Text: That's a pin, not a fork.
Comments.UserDisplayName: Acccumulation
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-11-08T10:03:51.373Z
Comments.Text: @Acccumulation the trap is not the pin, but the fork that follows afterward if the queen takes the bishop.
Comments.UserDisplayName: justhalf
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-11-11T19:49:06.523Z
Comments.Text: @Acccumulation actually before moderation there was a term 'pork', which means a pin and a fork at the same time.
Comments.UserDisplayName: nik tomas
Tags: <tactics><opening-traps><pins><patterns><fork>
Title: Which opening contains this trap?
ThreadText: # Which opening contains this trap?
  
  (Asked by: username_0 on 2021-11-07)
  
  The sequence of moves for White is Nd5, Bb4, and then Bb5, capturing the queen by a fork. The pattern should look something like the below position. I remember that I've seen this trap in some opening, but I can not remember which is it. It is probably some Sicilian sideline.
  
  ```
  [FEN "rnb1kbnr/pp2pppp/2q5/1B1N4/1B6/8/PPPPPPPP/R2QK1NR w KQkq - 0 1"]
  
  ```
  
  **Tags:** tactics, opening-traps, pins, patterns, fork
  
  > **Comments:**
  > **username_1**: I vaguely recognize this from some lines in the open sicilian, but I doubt that black's queen is on c6. I find it much more likely that black's queen is on b6 and that white moves Nd5.  
  > **username_2**: That's a pin, not a fork.  
  > **username_3**: @username_2 the trap is not the pin, but the fork that follows afterward if the queen takes the bishop.  
  > **username_0**: @username_2 actually before moderation there was a term 'pork', which means a pin and a fork at the same time.  
  
  ---
  
  ## 3 answers
  
  ### Answer by username_4 on 2021-12-05. Score: 2 | Accepted answer
  
  There is also one line in the Modern, which pretty much matches your setup:
  
  ```
  [FEN "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"]
  
  1. e4 g6 2. d4 Bg7 3. Nc3 c5 4. dxc5 Qa5 5. Bd2 Qxc5 6. Nd5 Nf6?? {for instance, there are several moves losing the queen. The main move seems to be 6. ..Na6} 7. Bb4 Qc6 8. Bb5
  
  ```
  
  
  ---
  
  ### Answer by username_5 on 2021-11-08. Score: 6
  
  Adding to username_6's answer, I more remember it from the Scandinavian, because there the bQ gets out early anyway and it takes much less patzer moves to irreversibly trap it this way. Example:
  
  ```
  [FEN "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"]
  
  1.e4 d5 2.exd5 Qxd5 3.Nc3 Qe5+ {or Qe6+, still 70 games up to here on Lichess} 4.Be2 Qf6? 5.Nd5!? Qc6?? 6.Bb5! 1-0
  
  ```
  
  For a definite answer, the move/board pattern "Nd5 Qc6 Bb5" should be searchable (at least with Costeff's CQL tool).
  
  
  ---
  
  ### Answer by username_6 on 2021-11-08. Score: 5
  
  A configuration of pieces like this can occur in many Sicilian sidelines, or with colors reversed in the English. For example 1. e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.Nc3 Qb6 5.Nd5, or 1.c4 e5 2.Nc3 Bb4 3.Qb3 Nc6 4.g3 Nd4. I am not aware that it has a name, or is even of much importance. Although the Knight makes a slightly surprizing advance that seems to gain a tempo, the opponent can just retreat the Queen to her original square and then drive the Knight back with their e-Pawn. Nobody gains or loses anything. There can be an exception if one of the e-Pawns has alredy made a double jump, in which case the Queen move would be a oversight.
  
  
  ---
  
  