From 9fcd47a717cfdf8c44127710fdb3325218a12259 Mon Sep 17 00:00:00 2001 From: Shawn Xu Date: Thu, 25 Jun 2026 13:06:10 +0200 Subject: [PATCH] Update main network to nn-f8a759c05f9f.nnue This network is further trained on a new BT4 distillation stage, fine tuning on ~2 billion positions relabeled with the value head output of `BT4-tf13tune.pb.gz`. The dataset can be found at https://huggingface.co/datasets/xushawn/test80-bt4-relabel. A modified branch of lc0 was used to derive this data: https://github.com/xu-shawn/lc0/tree/relabel_dual_stream_test 2 billion positions represent a tiny subset of the total training data, and BT4 relabeling is inherently computationally expensive. I expect a lot more gains as more data are relabeled, but it will likely require coordinated community effort. Everyone is welcome to contribute, and yl25946 has made a spreadsheet to track progress: https://docs.google.com/spreadsheets/d/1yanofhusEzDg8ZnurAw799ikoTY6GcqsNMYfpswOIbw/edit. Special thanks to Viren6, who performed policy/value distillation experiments on Monty, and created the lc0 distillation fork that the current relabeler is based on; yl25946 for proposing the idea of large network distillations back in February 2025, running distillation experiments on the HL4096 network, and working on fine tuning attempts; vondele for nettest and suggesting the fine-tuning approach; and many others on the knowledge distillation thread in the SF Discord #ideas channel. nettest PR: https://github.com/vondele/nettest/pull/369 Ongoing STC: LLR: -0.01 (-2.94,2.94) <0.00,2.00> Total: 72224 W: 18891 L: 18784 D: 34549 Ptnml(0-2): 336, 8437, 18332, 8798, 209 https://tests.stockfishchess.org/tests/view/6a3ae7913036e45021aeb4a0 Passed LTC: LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 25110 W: 6566 L: 6288 D: 12256 Ptnml(0-2): 27, 2625, 6957, 2935, 11 https://tests.stockfishchess.org/tests/view/6a3b73513036e45021aeb51e Passed VLTC: LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 18544 W: 4924 L: 4658 D: 8962 Ptnml(0-2): 5, 1730, 5533, 2002, 2 https://tests.stockfishchess.org/tests/view/6a3bbe233036e45021aeb56e closes https://github.com/official-stockfish/Stockfish/pull/6924 Bench: 2710209 Co-authored-by: Li Ying <121075683+yl25946@users.noreply.github.com> Co-authored-by: Viren6 <94880762+Viren6@users.noreply.github.com> --- src/evaluate.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/evaluate.h b/src/evaluate.h index e5fc66959..8bd924d8a 100644 --- a/src/evaluate.h +++ b/src/evaluate.h @@ -33,7 +33,7 @@ namespace Eval { // for the build process (profile-build and fishtest) to work. Do not change the // name of the macro or the location where this macro is defined, as it is used // in the Makefile/Fishtest. -#define EvalFileDefaultName "nn-71d6d32cb962.nnue" +#define EvalFileDefaultName "nn-f8a759c05f9f.nnue" namespace NNUE { class Network;