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Reckless v0.4.0
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@codedeliveryservice codedeliveryservice released this 13 Dec 15:09
· 792 commits to main since this release
v0.4.0
9ed16b2
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Learn about vigilant mode.

Search Improvements

  • Add internal iterative reductions.
  • Add futility pruning.
  • Add improving heuristic.
  • Implement a logarithmic formula for LMR, adjusted based on the history heuristic.
  • Adjust NMP based on depth with added zugzwang risk minimization.
  • Persist history table between searches and use a gravity formula.
  • Make use of TT in the quiescence search.

Evaluation Improvements

  • Enemy king-relative PST
  • Passed pawns
  • Isolated pawns

Other Changes

  • Implemented a Triangular PV table to report a full-length principal variation line.

Bug Fixes

  • Fixed a formatting bug when reporting mating scores.
  • Fixed a cache size reset bug when the ucinewgame command is received.

Self-Play Benchmark Against v0.3.0

STC 10+0.1s

Score of Reckless v0.4.0 vs Reckless v0.3.0: 539 - 47 - 164 [0.828] 750
...      Reckless v0.4.0 playing White: 284 - 17 - 74  [0.856] 375
...      Reckless v0.4.0 playing Black: 255 - 30 - 90  [0.800] 375
...      White vs Black: 314 - 272 - 164  [0.528] 750
Elo difference: 273.0 +/- 25.9, LOS: 100.0 %, DrawRatio: 21.9 %

LTC 60+0.6s

Score of Reckless v0.4.0 vs Reckless v0.3.0: 287 - 15 - 98 [0.840] 400
...      Reckless v0.4.0 playing White: 152 - 5 - 43  [0.868] 200
...      Reckless v0.4.0 playing Black: 135 - 10 - 55  [0.813] 200
...      White vs Black: 162 - 140 - 98  [0.527] 400
Elo difference: 288.1 +/- 34.5, LOS: 100.0 %, DrawRatio: 24.5 %
Assets 3
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