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I have read a few articles about the game between Stockfish and AlphaZero. But is there a place where anyone can play against AlphaZero?

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3 Answers 3

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As already explained by other answers, AlphaZero itself is not publicly available.

The community has created Leela Chess Zero, a chess engine that started by using the same basic concepts as AlphaZero, but has since seen many additional improvements. It's probably stronger than AlphaZero ever was. Their site has a page on how to play against it, either download it or play against one of the lichess bots.

As a side note, stockfish has also been improving steadily (mainly with the introduction of NNUE), so it should now also be able to beat the original AlphaZero version again.

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    On what grounds do you base your remark that it probably is stronger than AlphaZero? Has there been a series of 100 games of Leela against the old stockfish version that shows leela also didn't lose a single time and won > 25%? Or is there some kind of rating that can be computed?
    – Carlo Wood
    Dec 19, 2021 at 15:13
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    @CarloWood The big A0 vs SF8 match was 1000 games with 155 wins and 6 losses, which comes to +52 elo. A bit later SF11 was released with +150 elo compared to SF8. Currently in the CCC LC0 is only slightly worse then SF14, which should by now be much stronger than SF11 was. I think it's pretty safe to conclude from this that both SF and LC0 are stronger than A0 was. Dec 19, 2021 at 15:52
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    @CarloWood see this question: chess.stackexchange.com/questions/29791/… It's been over another year since I wrote that answer, and SF 15 dev has gained significant strength over SF 11, which was the version at the time.
    – Allure
    Dec 20, 2021 at 2:57
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No, you can't play against AlphaZero, unless you get a special access from DeepMind.

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According to this website, AlphaZero was one of the strongest chess engine and defeated Stockfish (28 victories, 72 draws, and no losses). It runs on Google's supercomputer and is developed by DeepMind. There is no website which currently supports this type of chess engine. As discussed on the answer above, you'll have to get special permission from DeepMind to play against it. So, the answer is no. Read the article that I've linked on the top of this post for more information about its history, development, and impact in the chess world.

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