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@mvanthoor mvanthoor released this Mar 22, 2021 · 1 commit to master since this release

This release adds a transposition table to the engine. The rating increase as compared to Alpha 1 is about 165 Elo when running in the same gauntlet tournament. In self-play the difference is around 200 Elo.

  • New Features:
    • Transposition table for search and perft.
    • Ordering on transposition table move.
    • Set TT size through --hash option or UCI parameter.
  • Improvement:
    • Move check extension higher up in the search routine, to prevent quiescence search while in check.
  • Changes:
    • seldepth: report max ply reached during the search, instead of selective depth at last completed iteration.
    • Count all nodes visited, instead of only nodes which generated moves.
    • Change random number generator from SmallRng to ChaChaRng for reproducible behavior between platforms/OS's/architectures/versions.
  • Cleanup
    • Change Root PV handling to remove redundant code.
    • Miscellaneous small renames, refactors, and cleanups.
    • Add rand_chacha and remove SmallRng number generators.
    • Update Rand library to 0.8.3.
Assets 3