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
  
  
  ---
  
  