Answers.Body: <p>I will start by some gambits which are legitimate tries for advantage (for white) or for equality (for black) - so gambits which are not dubious as in they are as good as possible.</p>
  <p>Most common example is <strong>Marshall attack</strong> in Ruy lopez, which is today studied so well it's practically book draw. White players commonly today play anti-marshall lines to dodge it.</p>
  <pre><code>[fen &quot;&quot;]
  [Startply &quot;16&quot;]
  
  1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5
  </code></pre>
  <p>In Semi-Slav complex there are two very respected gambits. First of them is <strong>Anti-Moscow gambit</strong>, which leads to very irrational positions:</p>
  <pre><code>[fen &quot;&quot;]
  [Startply &quot;14&quot;]
  
  
  1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. Bg5 h6 6. Bh4 dxc4 7. e4 g5
  </code></pre>
  <p>And <strong>Marshall gambit</strong>:</p>
  <pre><code>[fen &quot;&quot;]
  [Startply &quot;11&quot;]
  1.d4 d5 2.c4 e6 3.Nc3 c6 4.e4 dxe4 5.Nxe4 Bb4+ 6.Bd2
  </code></pre>
  <p>English and Benoni (due to transposition) players will be familiar with <strong>Kasparov gambit</strong>:</p>
  <pre><code>[fen &quot;&quot;]
  [Startply &quot;12&quot;]
  
  1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 e5 5. Nb5 d5 6. cxd5 Bc5
  </code></pre>
  <p>In this line of Phillidor <strong>Shirov gambit</strong> is probably most critical. Position can also be reached through Pirc move order:</p>
  <pre><code>[fen &quot;&quot;]
  [Startply &quot;9&quot;]
  
  1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Nc3 Ngf6 5. g4 
  </code></pre>
  <p>Lets switch to gambits which promise white &quot;merely&quot; equality in case of black best play - so gambits which are not dubious as in they do not lead to worse position.</p>
  <p>Most promising of these probably is <strong>Urosov gambit</strong>, even though it is old enough to be considered romantic. Most lines in it promise white at least some advantage, except 4. ... Bb4+, which tends to lead to equalish endgames. Black can easily dodge it though by transposing to open variations of two knights defence.</p>
  <pre><code>[fen &quot;&quot;]
  [Startply &quot;9&quot;]
  
  1. e4 e5 2. Bc4 Nf6 3. d4 exd4 4. Nf3 Nxe4 5. Qxd4 
  </code></pre>
  <p><strong>Evans gambit</strong> also promises at least equality for white in all lines. However black has available plenty sound defences to choose from.</p>
  <pre><code>[fen &quot;&quot;]
  [Startply &quot;7&quot;]
  
  1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4
  </code></pre>
  <p>Staying in Italian complex I believe that good old <strong>Møller attack</strong> is still considered book draw:</p>
  <pre><code>[fen &quot;&quot;]
  [Startply &quot;17&quot;]
  
  1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 Nxe4 8. O-O Bxc3 9. d5
  </code></pre>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2023-06-01T12:25:12.410Z
Answers.LastActivityDate: 2023-06-01T12:25:12.410Z
Answers.UserDisplayName: Matija Sirk
Body: <p>I often hear about &quot;dubious&quot; gambits - those that may be successful against mediocre opponents, but with correct preparation or against an engine are inaccurate.</p>
  <p>Which gambits do the engines rate as either the best or almost-best move in the given situation? That is, which are the non-dubious gambits, according to engine analysis?</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2023-06-01T03:05:29.937Z
Comments.Text: does the queen's "gambit" count? since it's not a "true gambit"
Comments.UserDisplayName: qwr
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2023-06-01T03:47:09.560Z
Comments.Text: I hear that engines favor the Halloween Gambit with prejudice.
Comments.UserDisplayName: Rewan Demontay
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2023-06-01T04:21:01.637Z
Comments.Text: Does this answer your question? https://chess.stackexchange.com/questions/24922/are-there-any-gambits-which-yield-an-advantage-for-the-side-down-material
Comments.UserDisplayName: Allure
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2023-06-01T11:58:04.603Z
Comments.Text: Queens Gambit is probably your best bet...but its not really a gambit. Generally speaking No gambits are positively evaluated unless the opponent accepts it.
Comments.UserDisplayName: Dheebs
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2023-06-01T12:24:28.680Z
Comments.Text: The obvious answer for a "true gambit" would be the Marshall Gambit in the Ruy Lopez.
Comments.UserDisplayName: koedem
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2023-06-02T02:01:44.907Z
Comments.Text: That duplicate is not the same as this question. It is more specific: asking about gambits that are accepted, and don't immediately regain the lost material. My question does not have these stipulations.
Comments.UserDisplayName: Steve Bennett
Tags: <opening><engines><gambits>
Title: Which gambits do engines rate positively?
ThreadText: # Which gambits do engines rate positively?
  
  (Asked by: username_0 on 2023-06-01)
  
  I often hear about "dubious" gambits - those that may be successful against mediocre opponents, but with correct preparation or against an engine are inaccurate.
  
  Which gambits do the engines rate as either the best or almost-best move in the given situation? That is, which are the non-dubious gambits, according to engine analysis?
  
  **Tags:** opening, engines, gambits
  
  > **Comments:**
  > **username_1**: does the queen's "gambit" count? since it's not a "true gambit"  
  > **username_2**: I hear that engines favor the Halloween Gambit with prejudice.  
  > **username_3**: Does this answer your question? https://chess.stackexchange.com/questions/24922/are-there-any-gambits-which-yield-an-advantage-for-the-side-down-material  
  > **username_4**: Queens Gambit is probably your best bet...but its not really a gambit. Generally speaking No gambits are positively evaluated unless the opponent accepts it.  
  > **username_5**: The obvious answer for a "true gambit" would be the Marshall Gambit in the Ruy Lopez.  
  > **username_0**: That duplicate is not the same as this question. It is more specific: asking about gambits that are accepted, and don't immediately regain the lost material. My question does not have these stipulations.  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_6 on 2023-06-01. Score: 3
  
  I will start by some gambits which are legitimate tries for advantage (for white) or for equality (for black) - so gambits which are not dubious as in they are as good as possible.
  
  Most common example is **Marshall attack** in Ruy lopez, which is today studied so well it's practically book draw. White players commonly today play anti-marshall lines to dodge it.
  
  ```
  [fen ""]
  [Startply "16"]
  
  1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5
  
  ```
  
  In Semi-Slav complex there are two very respected gambits. First of them is **Anti-Moscow gambit**, which leads to very irrational positions:
  
  ```
  [fen ""]
  [Startply "14"]
  
  1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. Bg5 h6 6. Bh4 dxc4 7. e4 g5
  
  ```
  
  And **Marshall gambit**:
  
  ```
  [fen ""]
  [Startply "11"]
  1.d4 d5 2.c4 e6 3.Nc3 c6 4.e4 dxe4 5.Nxe4 Bb4+ 6.Bd2
  
  ```
  
  English and Benoni (due to transposition) players will be familiar with **Kasparov gambit**:
  
  ```
  [fen ""]
  [Startply "12"]
  
  1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 e5 5. Nb5 d5 6. cxd5 Bc5
  
  ```
  
  In this line of Phillidor **Shirov gambit** is probably most critical. Position can also be reached through Pirc move order:
  
  ```
  [fen ""]
  [Startply "9"]
  
  1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Nc3 Ngf6 5. g4 
  
  ```
  
  Lets switch to gambits which promise white "merely" equality in case of black best play - so gambits which are not dubious as in they do not lead to worse position.
  
  Most promising of these probably is **Urosov gambit**, even though it is old enough to be considered romantic. Most lines in it promise white at least some advantage, except 4. ... Bb4+, which tends to lead to equalish endgames. Black can easily dodge it though by transposing to open variations of two knights defence.
  
  ```
  [fen ""]
  [Startply "9"]
  
  1. e4 e5 2. Bc4 Nf6 3. d4 exd4 4. Nf3 Nxe4 5. Qxd4 
  
  ```
  
  **Evans gambit** also promises at least equality for white in all lines. However black has available plenty sound defences to choose from.
  
  ```
  [fen ""]
  [Startply "7"]
  
  1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4
  
  ```
  
  Staying in Italian complex I believe that good old **Møller attack** is still considered book draw:
  
  ```
  [fen ""]
  [Startply "17"]
  
  1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 Nxe4 8. O-O Bxc3 9. d5
  
  ```
  
  
  ---
  
  