stockfish-nnue-2020-07-15

Changes:

• Fixed a bug that the learn command does not save the final net. Thank you, joergoster.

The nn parameter file is not included in this release. Please find the strongest nn parameter file in the #sf-nnue-dev channge in the Stockfish unofficial Discord server (https://discord.gg/ZzJwPv3).

filename	CPU instructions	Supported CPUs
sse2	Intel Streaming SIMD Extensions 2	< Core 2 Duo (Merom)
ssse3	Intel Supplemental Streaming SIMD Extensions 3	>= Core 2 Duo (Merom)
sse41	Intel Streaming SIMD Extensions 4.1	>= Core 2 Duo (Penryn)
sse42	Intel Streaming SIMD Extensions 4.2	>= Core i7 (Bloomfield)
avx2	Intel Advanced Vector Extensions 2	Modern AMD Processors
bmi2	Intel Advanced Vector Extensions 2	>= Core i7 (Haswell)

filename	network
no-nnue	No neural networks included.
halfkp_256x2-32-32	halfkp_256x2-32-32
halfkp_384x2-32-32	halfkp_384x2-32-32

filename	usage
nnue-gen-sfen-from-original-eval	training data generator.
nnue	chess engine
nnue-learn	training data generator + trainer with blas (training is fast)

EDIT: 2020-07-15 23:02 There was a bug that halfkp_384x2-32-32 binaries read halfkp_256x2-32-32 net files. Binaries were replaced.