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 Stockfish Announcement!

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mwyoung

mwyoung


Posts : 880
Join date : 2020-11-25
Location : USA

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PostSubject: Stockfish Announcement!   Stockfish Announcement! EmptyTue Feb 16, 2021 7:05 am

Statement on Fat Fritz 2
Stockfish is an open-source project, sharing and freely distributing the code, tools and data needed to deliver this chess engine. We do this because we are convinced that open software and open data are key ingredients to make rapid progress, and thus for the benefit of our users. The recent progress in playing strength of Stockfish confirms the path taken. We proudly provide the tools for free chess analysis to millions of users, with countless titled players using Stockfish for their preparation. Be assured that free engines will serve you well!

Recently, ChessBase has started distribution and sales of the Fat Fritz 2 chess engine. This chess engine is a Stockfish derivative, with a few lines of code modification (engine name, authors list and a few parameters), and a new set of NNUE net weights considered proprietary. ChessBase’s communication on Fat Fritz 2, claiming originality where there is none, has shocked our community. Furthermore, the engine Fat Fritz 2 fails to convince on independent rating lists, casting doubt on the usefulness of those modifications. Indeed, we feel that customers buying Fat Fritz 2 get very little added value for money. Claims to the contrary appear misleading.

Selling Stockfish derivatives is possible with the GPLv3 license we grant, but not without requirements. In particular, the license states that if one redistributes a program derived from our work, the corresponding modifications of our sources and all information needed to build that program must be made available. Only after explicitly informing Albert Silver (the author of the net in Fat Fritz 2) of a license violation have matching C++ sources, but not the net weights, been made available. Obviously, we condemn the approach taken.

—Joost VandeVondele, current maintainer of the Stockfish project
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Admin
Admin
Admin


Posts : 2522
Join date : 2020-11-17
Location : Netherlands

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PostSubject: Re: Stockfish Announcement!   Stockfish Announcement! EmptyTue Feb 16, 2021 11:24 am



Interview with Albert Silver on Fat Fritz family of chess engines.

Brendan, TheSelfImprover, mwyoung and harvey williamson like this post

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matejst

matejst


Posts : 612
Join date : 2020-11-26

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PostSubject: Re: Stockfish Announcement!   Stockfish Announcement! EmptyTue Feb 16, 2021 11:34 am

It becomes very ugly. What I do not understand is why CB did not release the net in a separate file, as a library. Everything would have been legal in that case. On the other hand, I do not think that they have not consulted a lawyer.
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Admin
Admin
Admin


Posts : 2522
Join date : 2020-11-17
Location : Netherlands

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PostSubject: Re: Stockfish Announcement!   Stockfish Announcement! EmptyTue Feb 16, 2021 12:11 pm

With the popularity of Lichess and Chess.com they face major competition to their Playchess which (IMO) for years was a considerable part of their income. Come to think of it, they are still in business after all those years while about everything is free. And a cat in a corner makes strange jumps.

Surely Komodo team can't afford working full time on their engine, the time you could make a living from a chess engine is long gone.

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matejst

matejst


Posts : 612
Join date : 2020-11-26

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PostSubject: Re: Stockfish Announcement!   Stockfish Announcement! EmptyTue Feb 16, 2021 1:04 pm

Ed, you forget that chess popularity has risen exponentially. I rather think that their incomes are even higher, especially with the smartphone market now. I see that Fritz 15 for android is free, and CB online is 9$. It is just an additional market, although with lot of competition, but I see that Playchess, their app for Android, has more than 100k downloads.
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mwyoung

mwyoung


Posts : 880
Join date : 2020-11-25
Location : USA

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PostSubject: Re: Stockfish Announcement!   Stockfish Announcement! EmptyTue Feb 16, 2021 4:19 pm

Admin wrote:


Interview with Albert Silver on Fat Fritz family of chess engines.


Fat Fritz 2
PRODUCT
DESCRIPTION
SYSTEM

Fat Fritz 2.0 is the successor to the revolutionary Fat Fritz, which was based on the famous AlphaZero algorithms. Using a new Japanese AI technology that achieves optimal performance on regular computer processors (CPUs – no expensive graphic card required) it combines the best of both worlds: a massive new neural network, trained by Albert Silver with the original Fat Fritz, while learning from the surgical precision of Stockfish’s legendary search. This new version takes chess analysis to the next level and is a must for players of all skill levels, whether beginner or professional, who won’t accept any compromises. Its understanding is unparalleled, as it learned by literally studying billions of chess positions.    lol!

Stockfish Announcement! Not_nu10

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