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Berserk 4.2.0

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@jhonnold jhonnold released this 25 May 23:46
· 539 commits to main since this release
4.2.0
c5c3f2e
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GPG key ID: 4AEE18F83AFDEB23
Learn about vigilant mode.

This is a huge dump of search and evaluation changes. Most of which present with minor Elo results. I estimate this to be 50-60 Elo stronger than Berserk 4.1.0.

Changes

  • King safety pawn shelter tuned
  • LMR depth adjustment
    • 2 -> 3
  • Using Ed's IIR instead of IID
  • Tuned reverse futility pruning cutoffs
    • [62,132,220...] -> [65,135,220,...]
  • Removed bad rook evaluation terms
  • Adjusted delta pruning cutoff
    • 200 -> 150
  • Random draw values
  • Dragon Bishop (Long diagonal)
  • TT utilized in QSearch
  • Time adjusted to be around window expansions
  • Double singular extension (sf inspired)
  • Prob Cut
  • Pinned pieces in king safety
  • Recapture extension
  • History heuristic rewrite
    • Using a more standard formula rather than numerator/divisor
  • Late Move Pruning adjustments

Bugs

  • Transposition table depth issue
  • Transposition table bucket issue
  • KPK
Assets 8