Working on the first NNUE release

Finally I have found the energy to work on the first NNUE release of rofChade. I already started this summer with rewriting the NNUE support in rofChade, and developed some tools for generating positions, recalculating positions and recalculating the gameresult of game positions.

With these tools I created 1 Billion positions, and recalculated the positions with the old evaluation of rofChade with depth 10, but could’t find the energy to start working on a trainer.

As happened before, the upcoming CSVN tournament (which in the end was canceled due to new covid regulations in the Netherlands) was the final push to really start with a trainer. Eventually I decided to use Stockfishes pytorch trainer for the training part and started training. Thank you for making the trainer available for everybody!

After some initial issues I was able to create a “standard” HALFKA network trained on the 1B positions and the result was already impressive. + 100 elo….. This test version runs in Frank Quisinsky FCP Tourney-2022, he was kind enough to let the initial version run in the tournament! You can find the tournament here:

In the meantime I was able to get around 40 more elo out of the current dataset with the old evaluation, by finetuning the trainer parameters.

I did a recalculation of the dataset with the first NNUE network, but after some 10 days of recalculation with 126 threads, the results of the training are disappointing. I hope there is a bug in the NNUE recalc software, otherwise I will have to start with different recalc strategies.

I’m not yet where I want to be with the first “official” release of a NNUE rofChade, but I’m getting closer…..


8 comments to “Working on the first NNUE release”

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  1. Mark - 13/12/2021 Reply

    great news, hope you get a very high engine score soon,..maybe fighting at the top of the table…lol… success on your new engine… looking forward to it… hugs.. Mark

    • rofChade - 18/12/2021 Reply

      First results look good, but I need to do better….



  2. Giulio Bigotti - 18/12/2021 Reply

    good news after almost one year !!!!!!

    • rofChade - 18/12/2021 Reply


  3. AAR - 19/12/2021 Reply

    AAR Well Done…Rofchade played well in 2021 KO Tourney…very close to the tip top of the Chess Engine World (Chasing Only Stockfish)…

  4. Ipmanchess - 19/12/2021 Reply

    Hi Ronald..
    If you want some tests and want to have a idea where it will take place in my rating lists ,it’s always welcome!

    Kind regards,

  5. Marcos - 28/03/2022 Reply

    Hi Ronald..
    great performance in TCEC.. to Rofchade… my congratulations., any chance of being released to the public later this month?.. big hug

  6. Marcos - 03/05/2022 Reply

    Hi Ronald,… any news about your extraordinary and very strong chess engine?, some friends of mine asked me to take a look with you to see if we would have any news?… anyway, thank you for your kindness in always responding to our messages, we are waiting for news.. hug have a good week….

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