This patch release fixes some bugs that were introduced in v8.1.0
Changes
- Fixed a bug where the PV info did not fit to the returned bestmove
- Fixed a bug where the ponder move did not fit to the returned bestmove
- Fixed a bug where bestmove 0000 was returned, if the search limit was not sufficient to complete at least one iteration
Notes
Due to the lack of an ARM-based (Apple Silicon) computer, the "apple-silicon" builds are untested.
Installation
The chess engine is available for Windows, macOS and Linux and requires a 64 Bit CPU.
There are optimized executables available for different CPU micro-architecture generations.
If you have a relatively modern CPU (2013+) with AVX2 support, then the ...-x86_64-avx2 executable is highly recommended for best performance.
| Executable | Description | Min. CPU Generation | Required Instruction Sets |
|---|---|---|---|
| x86_64-avx512 | Higher performance for CPUs supporting AVX-512 | x86-64-v4 | AVX-512 |
| x86_64-avx2 | Recommended for best performance on most modern CPUs without AVX-512 support | Intel Haswell / Zen1 | AVX2, BMI1 |
| x86_64-sse4-popcnt | Lower performance, recommended for CPUs without AVX2 support | Intel Nehalem / AMD Bulldozer | SSE4.2, SSE3, POPCNT |
| x86_64-nopopcnt | Lowest performance, but compatible with most x86_64 CPUs | --- | SSE2, CMOV |
| apple-silicon | Native builds for Apple Silicon processors (ARM aarch64) | Apple M1 |