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The network was trained by [[Albert Silver]] with the help of [[Daniel Uranga]] and [[Dietrich Kappe]], who provided scripts and ideas.
Further credits were given to the [[:Category:Stockfish Contributor|Stockfish contributors]], and in particular [[Yu Nasu]] for his groundbreaking work on NNUE, and [[Hisayori Noda]] for the initial [[Stockfish NNUE]] implementation <ref>[https://en.chessbase.com/post/fat-fritz-2-best-of-both-worlds Fat Fritz 2: The Best of Both Worlds] by [[Albert Silver]], [[ChessBase|ChessBase News]], February 10, 2021</ref>.
Using the original Fat Fritz as initial supervisor to evaluate chess positions, the learning of Fat Fritz 2 was [[Reinforcement Learning|reinforced]] by Stockfish's [[Alpha-Beta|alpha-beta]] [[Search|search]] <ref>[https://en.chessbase.com/post/fat-fritz-2-0-the-new-number-1 Fat Fritz 2.0 - The new number 1], [[ChessBase|ChessBase News]], February 09, 2021</ref>. While the initial release had the 40 MiB NNUE file embedded inside the Fat Fritz 2 executable, it was soon separated due to a possible [[Free Software Foundation#GPL|GPL license]] violation, the Stockfish executable with source code available at [https://en.wikipedia.org/wiki/GitHub GiTHub] <ref>[https://github.com/DanielUranga/Stockfish/tree/ff2 GitHub - DanielUranga/Stockfish at ff2] by [[Daniel Uranga]]</ref>, and a none GPL licensed NNUE file on GiTHub as well <ref>[https://github.com/DanielUranga/Stockfish/blob/ff2/src/FatFritz2_v1.bin Stockfish/FatFritz2_v1.bin at ff2 · DanielUranga/Stockfish · GitHub]</ref>, obviously with weights resulting in weaker play than the commercial purchased network.
=See also=
==2021==
* [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=76537 Fat Fritz 2] by [[Jouni Uski]], [[CCC]], February 09, 2021
: [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=76537&start=270 Re: Fat Fritz 2] by [[Gary Linscott|gladius]], [[CCC]], February 14, 2021 » [[CCRL]]
* [https://groups.google.com/g/fishcooking/c/VoCCwyRrYT8/m/3N_ShromAgAJ Fat Fratz 2.0 Copyleft Infringement] by Bernt Nicht, [[Computer Chess Forums|FishCooking]], February 10, 2021
: [https://groups.google.com/g/fishcooking/c/VoCCwyRrYT8/m/V8GrIbdCAgAJ Re: Fat Fratz 2.0 Copyleft Infringement] by [[Joost VandeVondele]], [[Computer Chess Forums|FishCooking]], February 10, 2021
