This is a bugfix release for the Tablebase functionality. Tablebases in version 4.0.0 mostly only work when analyzing FENs, and not during real games.
Binary Guide
- generic: Slowest
- ssse3: Slightly faster, requires a CPU with SSSE3 support
- fma: Faster, requires a CPU with FMA support
- avx2: Faster, requires a CPU with AVX2 support
- bmi2: Faster, requires a CPU with AVX2 and BMI2 support. Not recommended for Zen1 and Zen2 CPUs
- avx512: Faster, requires a CPU with AVX512 support
- avx512vnni: Fastest, requires a CPU with AVX512 and VNNI support
- neon: For ARM CPUs that support NEON instructions
If you're unsure about what binary to use, start with avx512vnni and find the first one that does not crash on your machine. There is a chance that the AVX2 binary is faster on your system, despite it supporting AVX512.