ChessBase....Free Software?!?!?

[supersharp77]

Just Spotted This One Totally By Accident (Thx Chess Engines Diary!! )..........No Idea What Is Going On.....


http://foss.chessbase.com/#Stockfish

[Dariusz]

https://www.chessengeria.com/post/fat-fritz-2-free

[RubiChess]

I am pretty sure that this download doesn't contain the network file that is (was) sold with FF2. It contains FatFritz2_v1.bin which imo is the weaker network that was for download long before the lawsuit against ChessBase. The complete source stockfish-ff2.zip was for download since 02/2021.
And before you ask me: I have no idea if the court said anything about giving the sold network file for free to the public.

Regards, Andreas

[Damir]

The supersharp user needs to be banned. He writes a lots of nonsense just like Chessqueen. He maybe even worse than him..

[Modern Times]

I am pretty sure that this download doesn't contain the network file that is (was) sold with FF2. It contains FatFritz2_v1.bin

Regards, Andreas

It is exactly the same filesize as the net that came with the commercial product, but that is not definitive.

[Modern Times]

I am pretty sure that this download doesn't contain the network file that is (was) sold with FF2. It contains FatFritz2_v1.bin which imo is the weaker network that was for download long before the lawsuit against ChessBase. The complete source stockfish-ff2.zip was for download since 02/2021.
And before you ask me: I have no idea if the court said anything about giving the sold network file for free to the public.

Regards, Andreas

https://stockfishchess.org/files/settlement_english.pdf

b)
Neural Networks offered by Defendant for use with Stockfish that are included in the compilation or
dynamically loaded at runtime to initialize the data structures and logic of the Software must be subject
to GPL-3.0 or a compatible license.

[Archimedes]

The difference with the current developer version of Stockfish is about 220 Elo with this net. If I can trust my short test on Android with very short thinking time (tc=10+0.1) and only 500 games (for the sake of the battery). Offset for rating of one of the engines was not set in Bayeselo.

Code: Select all

Rank Name              Rating   Δ     +    -     #     Σ    Σ%     W    L    D   W%    =%   OppR 
---------------------------------------------------------------------------------------------------------
   1 Stockfish 230209   3211   0.0   12   12   500  397.5  79.5  325   30  145  65.0  29.0  2989 
   2 Fat Fritz 2        2989 222.3   12   12   500  102.5  20.5   30  325  145   6.0  29.0  3211 
---------------------------------------------------------------------------------------------------------
  Δ = delta from the next higher rated opponent
  # = number of games played
  Σ = total score, 1 point for win, 1/2 point for draw

Is "FatFritz2_v1.bin" the original network of Fat Fritz 2, which was sold by Chessbase?

Answer from ChatGPT:

Yes, "FatFritz2_v1.bin" is the original neural network model used in the commercial version of Fat Fritz 2 that was sold by Chessbase. This is the primary neural network that powers the chess engine's evaluation function and is responsible for its playing strength.

[RubiChess]

https://discord.com/channels/4359437104 ... 1342419989
"the net is here https://github.com/DanielUranga/Stockfi ... tz2_v1.bin but again that is not the sold version"

[Guenther]

https://discord.com/channels/4359437104 ... 1342419989
"the net is here https://github.com/DanielUranga/Stockfi ... tz2_v1.bin but again that is not the sold version"

Just digging out additional past information for verification...
http://www.talkchess.com/forum3/viewtop ... 20#p882739