Creating binpack from custom evaluations | Stockfish | Page 1

hazy elk Oct 3, 2025, 5:02 PM

#

Hi all, new to NNUEs, I want to create an NNUE for stockfish based on a training set with evaluations based on a custom engine.
I see here https://github.com/official-stockfish/Stockfish/blob/tools/docs/generate_training_data.md that I can generate training data from Stockfish but this is not what I want.
Please advise on how I should create a binpack using my own positions and evaluations.

nimble sphinx Oct 3, 2025, 5:03 PM

#

There is a tool to convert PGNs to binpacks, sounds like an easy way to get started
https://github.com/Disservin/pgn2binpack

hazy elk Oct 3, 2025, 5:06 PM

#

Thanks, what else needs to be included in the file? I believe the positions need to be evaluated right?

nimble sphinx Oct 3, 2025, 5:09 PM

#

binpacks also store the outcome of each game

hazy elk Oct 3, 2025, 5:26 PM

#

Thanks

north schooner Oct 3, 2025, 7:42 PM

#

@cinder jungle should the readme include an example of what format the converter expects? for the evaluations for example, I'm guessing it expects cutechess format? in the case of this user which only has individual positions, does he need to create a fake pgn for each position and set it as unfinished with * ?

cinder jungle Oct 3, 2025, 7:50 PM

#

Unfinished shouldn’t matter, pgn expects the cutechess/fastchess eval format and a result tag

#

If each pgn has only has the start move you will end up with a really big binpack but should just work

#Creating binpack from custom evaluations