Fairy-Stockfish NNUE Training, number of layers and neurons to train for each layer

[musketeerchess]

Hi everyone,
I try to understand the way Fairy-Stockfish trains the NNUE for specific chess variants.
If i understood well, the are 4 layers of neurons. Each layer has 256 neurons. Are these informations correct?

Trying to understand nnue.md file a very nice and detailed description.

Thanks for your help

Zied