Yes Fat Fritz 2 is a UCI engine. Here are the file locations.

And a question. Is Fat Fritz 2 a free program since it is Stockfish And can it be given to someone?

mwyoung wrote:

And a question. Is Fat Fritz 2 a free program since it is Stockfish And can it be given to someone?

Well that’s the question.
Have CB published the source on GitHub or somewhere with GPL attached? If so, I guess you could compile it and distribute the executable plus source plus GPL notice any way you want.

Mark, so "fat-fritz2-x86-64-avx2.exe" is your executable for the sim-test? I am preparing it.

Its stockfish. Thats no secret.
They did not even tried to hide it by changing the name into something different then Stockfish.

Admin wrote:

Mark, so "fat-fritz2-x86-64-avx2.exe" is your executable for the sim-test? I am preparing it.

Yes, and I am off to work for the next 12 hours. Let me know when it is ready.

Admin wrote:

Mark, so "fat-fritz2-x86-64-avx2.exe" is your executable for the sim-test? I am preparing it.

We also need some comparison figures from a range of other NN and NNUE engines if possible

Chris Whittington wrote:

Admin wrote:

Mark, so "fat-fritz2-x86-64-avx2.exe" is your executable for the sim-test? I am preparing it.

We also need some comparison figures from a range of other NN and NNUE engines if possible

NNUE is hopeless, see my example post in the Fire thread.

Funny enough (last time I checked) SIMEX can handle Lc0 networks.