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@github-actions github-actions released this 25 Nov 06:42
· 37 commits to master since this release
9.0
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Learn about vigilant mode.

Changes since 8.0

Usability improvements

  • MultiPV Support
  • Supporting go searchmoves ..., go mate ... and go nodes ... UCI go commands, which makes the engine better at finding mate and also in analyzing (searchmoves).
  • Support of 7 different skill levels (1 being the weakest, while 7 is the strongest). Anchored around Rustic Alpha 3, I found that, based on CCRL the ratings will probably translate to the following:
    • Skill Level 1: 1270
    • Skill Level 2: 1440
    • Skill Level 3: 1630
    • Skill Level 4: 1856
    • Skill Level 5: 2004
    • Skill Level 6: 2074

Strength improvements

  • A much stronger network is included, trained on more than 500 million self-play positions.
  • A much more improved search
  • Better move ordering thanks to counter history and follow-up history
  • Lots of bug fixes!
  • Much better multi-threading support.

Which binary to use?

  • Ubunut/Linux 64-bit (not Raspberry Pi, AVX only): zahak-linux-amd64-9.0-avx
  • Apple Mac OSX (64-bit, Intel, AVX only): zahak-darwin-amd64-9.0-avx
  • MS Windows 64-bit (AVX only): zahak-windows-amd64-9.0-avx.exe

Acknowledgment

It is worth mentioning that all the skills from 1 to 6 are based on networks that are trained by Alan Cooper (Scally on CCC). Many thanks to him.

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