Answers.Body: <p>No, AlphaZero isn't open source.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-12-06T10:13:02.167Z
Answers.Text: <citation needed> ;-)
Answers.UserDisplayName: Peter - Reinstate Monica
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Answers.CreationDate: 2021-12-06T11:48:16.347Z
Answers.Text: Easier said than done, my Google Fu is strong and I wasn't able to find any info except this German: https://www.chess-international.com/?p=18146 I.e. even if you could DL it, you would need a special supercomputer.
Answers.UserDisplayName: Hauke Reddmann
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Answers.CreationDate: 2021-12-07T02:12:12.070Z
Answers.Text: I follow engine chess closely and am 100% certain this is the right answer. It is why AlphaZero has never competed in the standard chess engine tournaments, and why Leela Chess Zero started from scratch instead of from AlphaZero's base code. I do not have a source though, because it is common knowledge.
Answers.UserDisplayName: Allure
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-12-07T14:16:55.133Z
Answers.Text: Even the object code isn't available to the public, is it? Matthew Sadler was temporarily given special access to AlphaZero to write his book *Game Changer* but my impression was that was a very special exception.
Answers.UserDisplayName: Timothy Chow
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Answers.CreationDate: 2021-12-07T15:38:29.683Z
Answers.Text: @TimothyChow yeah, AlphaZero is private. If you want access to AlphaZero you need to ask DeepMind.
Answers.UserDisplayName: Allure
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Answers.CreationDate: 2021-12-06T01:25:05.510Z
Answers.LastActivityDate: 2021-12-06T01:25:05.510Z
Answers.UserDisplayName: Allure
Body: <p>There are a lot of fake AlphaZero projects on <a href="https://en.wikipedia.org/wiki/GitHub" rel="nofollow noreferrer">GitHub</a>. While I was googling if it was open-source, the answer in most places is <em>yes</em>, but I couldn’t find it anywhere. Is there a link to where the code is?</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-12-06T06:22:28.437Z
Comments.Text: You might want to look at [Leela Chess Zero](https://lczero.org/) which is free and open-source.
Comments.UserDisplayName: Minot
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-12-06T13:34:57.543Z
Comments.Text: Is Leela stronger than Stockfish?
Comments.UserDisplayName: Varun W.
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-12-06T13:43:14.440Z
Comments.Text: Not yet as far as I know, but it is similar to AlphaZero in the sense that it learns chess without any knowledge except the basic rules.
Comments.UserDisplayName: Minot
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-12-06T15:02:54.493Z
Comments.Text: Possibly relevant to OP:  DeepMind's [AlphaZero Resources webpage](https://deepmind.com/research/open-source/alphazero-resources)
Comments.UserDisplayName: SecretAgentMan
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-12-06T17:01:13.653Z
Comments.Text: [Agadmator](https://www.youtube.com/watch?v=cAIhA88SMuk) [has](https://www.youtube.com/watch?v=SFn9HvzkOqI) [covered](https://www.youtube.com/watch?v=K0gBybDFcMg) [Leela Chess Zero](https://www.youtube.com/watch?v=g08qtNIoJhM), but not Leela vs. [AlphaZero](https://www.youtube.com/watch?v=mOqmLYlFdBo) [as](https://www.youtube.com/watch?v=QEylXLEJ-Eg) [far](https://www.youtube.com/watch?v=SRRu8H8025E) [as](https://www.youtube.com/watch?v=wui0YweevtY) [I](https://www.youtube.com/watch?v=Vq0uTq0Z3Xk) [know](https://www.youtube.com/watch?v=p393G67bfNM).
Comments.UserDisplayName: Peter Mortensen
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-12-06T19:27:28.040Z
Comments.Text: @VarunW: LeelaZero is stronger than AlphaZero was, and it was briefly on par with the then latest Stockfish. But current latest Stockfish is again stronger.
Comments.UserDisplayName: RemcoGerlich
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-12-07T05:41:02.580Z
Comments.Text: @PeterMortensen Leela has never played AlphaZero, so it's not surprising.
Comments.UserDisplayName: Allure
Tags: <alphazero><development><open-source>
Title: Is AlphaZero open source?
ThreadText: # Is AlphaZero open source?
  
  (Asked by: username_0 on 2021-12-06)
  
  There are a lot of fake AlphaZero projects on [GitHub](https://en.wikipedia.org/wiki/GitHub). While I was googling if it was open-source, the answer in most places is *yes*, but I couldn’t find it anywhere. Is there a link to where the code is?
  
  **Tags:** alphazero, development, open-source
  
  > **Comments:**
  > **username_1**: You might want to look at [Leela Chess Zero](https://lczero.org/) which is free and open-source.  
  > **username_0**: Is Leela stronger than Stockfish?  
  > **username_1**: Not yet as far as I know, but it is similar to AlphaZero in the sense that it learns chess without any knowledge except the basic rules.  
  > **username_2**: Possibly relevant to OP:  DeepMind's [AlphaZero Resources webpage](https://deepmind.com/research/open-source/alphazero-resources)  
  > **username_3**: [Agadmator](https://www.youtube.com/watch?v=cAIhA88SMuk) [has](https://www.youtube.com/watch?v=SFn9HvzkOqI) [covered](https://www.youtube.com/watch?v=K0gBybDFcMg) [Leela Chess Zero](https://www.youtube.com/watch?v=g08qtNIoJhM), but not Leela vs. [AlphaZero](https://www.youtube.com/watch?v=mOqmLYlFdBo) [as](https://www.youtube.com/watch?v=QEylXLEJ-Eg) [far](https://www.youtube.com/watch?v=SRRu8H8025E) [as](https://www.youtube.com/watch?v=wui0YweevtY) [I](https://www.youtube.com/watch?v=Vq0uTq0Z3Xk) [know](https://www.youtube.com/watch?v=p393G67bfNM).  
  > **username_4**: @VarunW: LeelaZero is stronger than AlphaZero was, and it was briefly on par with the then latest Stockfish. But current latest Stockfish is again stronger.  
  > **username_5**: @username_3 Leela has never played AlphaZero, so it's not surprising.  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_5 on 2021-12-06. Score: 11 | Accepted answer
  
  No, AlphaZero isn't open source.
  
  > **Comments:**
  > **username_6**: <citation needed> ;-)  
  > **username_7**: Easier said than done, my Google Fu is strong and I wasn't able to find any info except this German: https://www.chess-international.com/?p=18146 I.e. even if you could DL it, you would need a special supercomputer.  
  > **username_5**: I follow engine chess closely and am 100% certain this is the right answer. It is why AlphaZero has never competed in the standard chess engine tournaments, and why Leela Chess Zero started from scratch instead of from AlphaZero's base code. I do not have a source though, because it is common knowledge.  
  > **username_8**: Even the object code isn't available to the public, is it? Matthew Sadler was temporarily given special access to AlphaZero to write his book *Game Changer* but my impression was that was a very special exception.  
  > **username_5**: @username_8 yeah, AlphaZero is private. If you want access to AlphaZero you need to ask DeepMind.  
  
  ---
  
  