Answers.Body: <p>Don't try this at home. ;-)</p>
  <ul>
  <li>First of all, a simple LiChess search gives this is B12 Caro-Kann Defense: Advance Variation, Tal Variation, i.e. it has even a name and is legit.</li>
  <li>Second, 8 games listed, with IMs playing it, so it's still rare.</li>
  <li>Third, standard Black move is Kb8. He doesn't even try to immediately throw everything except the kitchen sink at the white king!</li>
  <li>And that is because the king is rather safe there. Usually you now would try the can opener g6 or f6, but it's not so easy as the king side of Black is underdeveloped and White can keep the relevant files closed. Black can't simply pile up major force, and already Steinitz said you need a force plus to storm the defense.</li>
  <li>This is caused by the large space advantage of White at the kingside.</li>
  <li>A concrete advantage of wK on g3 is that it does something useful (protecting g4) and avoids something annoying (tactics on e1, pins on g1...).</li>
  <li>Note that the center is totally barricaded, otherwise it would be suicide.</li>
  <li>Summing up, yes, <em>in this concrete position</em> (modern chess is hyperconcrete) it might be a good idea.</li>
  </ul>
  <p>Concerning your last question (are there other variants?), this could be easily answered by a search in a Megabase. Steinitz Gambit of course comes to mind immediately.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-04-15T23:53:49.680Z
Answers.Text: Thanks for the detailed analysis! At first, I thought white is violating several opening principles (castle early, develop your pieces, do not move the same piece twice, etc.) But surprisingly, this opening makes sense for white.
Answers.UserDisplayName: Zuriel
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-04-15T15:11:48.400Z
Answers.LastActivityDate: 2021-04-15T15:11:48.400Z
Answers.UserDisplayName: Hauke Reddmann
Body: <p>I saw this opening for the first time and was amazed by the position of the white king.</p>
  <pre><code>[FEN &quot;?&quot;]
  [startply &quot;21&quot;]
  
  1. e4 c6 2. d4 d5 3. e5 Bf5 4. h4 h6 5. g4 Bd7 6. h5 e6 7. f4 c5 8. c3 Nc6 9. Nf3 Qb6 10. Kf2 O-O-O 11. Kg3
  </code></pre>
  <p>In this position, white made one knight move, two king moves, and no moves with the other pieces. Usually, we should castle early and hide the king in a safe corner. In this opening, white does the opposite by moving his king to g3 in the opening stage <strong>before developing most of their pieces</strong>. Is it really a good idea? Are there any other openings that you develop your king early in the game?</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-04-15T19:20:11.747Z
Comments.Text: Keres gambit: 1.e4 e5 2.f4 exf4 3.Nc3 Qh4+ 4.Ke2. Steinitz gambit: 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2. Tumbleweed gambit: 1.e4 e5 2.f4 exf4 3.Kf2. Two knights defense, fried liver variation: 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Nxd5 6.Nxf7 Kxf7 7.Qf3+ Ke6.
Comments.UserDisplayName: bof
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-04-15T20:52:45.710Z
Comments.Text: Ah, I remember another one, basically any variation of the pseudo sac 1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4. (This line is called Vienna Frankenstein-Dracula. Not making this up.) Usually, 4.Bxf7+ just drives the black king out but doesn't do White much good as he can't exploit it and just gave up center and bishop pair - Stockfish says -0.5.
Comments.UserDisplayName: Hauke Reddmann
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-04-16T00:43:47.590Z
Comments.Text: 1.e4 e5 2.Nc3 Bc5 3.Na4 Bxf2+ resulted in the White king being "developed" all the way to c6.
Comments.UserDisplayName: bof
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-04-16T04:43:28.510Z
Comments.Text: You could be interested in this Bobby Fisher game : https://youtu.be/ObmFR5Dz7Ac
Comments.UserDisplayName: Olivier Dulac
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-04-16T08:44:40.830Z
Comments.Text: @OlivierDulac in the game you show, Fischer is intentionally "mocking" his opponent. The example from this question is a legitimate attempt to play well.
Comments.UserDisplayName: David
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-04-16T08:46:08.580Z
Comments.Text: @David I know, that's why I propose it as a comment (as it is still interesting imo to see how he then used it) and not as an answer (as it indeed doesn't answer the question)
Comments.UserDisplayName: Olivier Dulac
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-04-16T08:52:40.117Z
Comments.Text: related: https://chess.stackexchange.com/questions/27227/what-is-the-bongcloud-opening
Comments.UserDisplayName: JDL
Tags: <opening><caro-kann><kings><development><king-safety>
Title: Developing the king before developing most of your pieces
ThreadText: # Developing the king before developing most of your pieces
  
  (Asked by: username_0 on 2021-04-15)
  
  I saw this opening for the first time and was amazed by the position of the white king.
  [FEN "?"]
  [startply "21"]
  
  1. e4 c6 2. d4 d5 3. e5 Bf5 4. h4 h6 5. g4 Bd7 6. h5 e6 7. f4 c5 8. c3 Nc6 9. Nf3 Qb6 10. Kf2 O-O-O 11. Kg3
  
  In this position, white made one knight move, two king moves, and no moves with the other pieces. Usually, we should castle early and hide the king in a safe corner. In this opening, white does the opposite by moving his king to g3 in the opening stage before developing most of their pieces. Is it really a good idea? Are there any other openings that you develop your king early in the game?
  
  **Tags:** opening, caro-kann, kings, development, king-safety
  
  > **Comments:**
  > **username_1**: Keres gambit: 1.e4 e5 2.f4 exf4 3.Nc3 Qh4+ 4.Ke2. Steinitz gambit: 1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.d4 Qh4+ 5.Ke2. Tumbleweed gambit: 1.e4 e5 2.f4 exf4 3.Kf2. Two knights defense, fried liver variation: 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Nxd5 6.Nxf7 Kxf7 7.Qf3+ Ke6.  
  > **username_2**: Ah, I remember another one, basically any variation of the pseudo sac 1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4. (This line is called Vienna Frankenstein-Dracula. Not making this up.) Usually, 4.Bxf7+ just drives the black king out but doesn't do White much good as he can't exploit it and just gave up center and bishop pair - Stockfish says -0.5.  
  > **username_1**: 1.e4 e5 2.Nc3 Bc5 3.Na4 Bxf2+ resulted in the White king being "developed" all the way to c6.  
  > **username_3**: You could be interested in this Bobby Fisher game : https://youtu.be/ObmFR5Dz7Ac  
  > **username_4**: @OlivierDulac in the game you show, Fischer is intentionally "mocking" his opponent. The example from this question is a legitimate attempt to play well.  
  > **username_3**: @username_4 I know, that's why I propose it as a comment (as it is still interesting imo to see how he then used it) and not as an answer (as it indeed doesn't answer the question)  
  > **username_5**: related: https://chess.stackexchange.com/questions/27227/what-is-the-bongcloud-opening  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_2 on 2021-04-15. Score: 9
  
  Don't try this at home. ;-)
  
  * First of all, a simple LiChess search gives this is B12 Caro-Kann Defense: Advance Variation, Tal Variation, i.e. it has even a name and is legit.
  * Second, 8 games listed, with IMs playing it, so it's still rare.
  * Third, standard Black move is Kb8. He doesn't even try to immediately throw everything except the kitchen sink at the white king!
  * And that is because the king is rather safe there. Usually you now would try the can opener g6 or f6, but it's not so easy as the king side of Black is underdeveloped and White can keep the relevant files closed. Black can't simply pile up major force, and already Steinitz said you need a force plus to storm the defense.
  * This is caused by the large space advantage of White at the kingside.
  * A concrete advantage of wK on g3 is that it does something useful (protecting g4) and avoids something annoying (tactics on e1, pins on g1...).
  * Note that the center is totally barricaded, otherwise it would be suicide.
  * Summing up, yes, *in this concrete position* (modern chess is hyperconcrete) it might be a good idea.
  
  Concerning your last question (are there other variants?), this could be easily answered by a search in a Megabase. Steinitz Gambit of course comes to mind immediately.
  
  > **Comments:**
  > **username_0**: Thanks for the detailed analysis! At first, I thought white is violating several opening principles (castle early, develop your pieces, do not move the same piece twice, etc.) But surprisingly, this opening makes sense for white.  
  
  ---
  
  