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v0.4.5-rc.1

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@github-actions github-actions released this 19 Sep 03:21
· 140 commits to master since this release

Features

  • (eval) Count the enemy pieces bearing on the king's ring, at zero weight [bench 3868987] [elo not measured]
  • (eval) Fit the king attack zone weights on the archive [bench 4102609] [elo +35 ±16 (sprt [0, 10] passed, 1000 games, 10+0.1, vs 4b1b80f)]
  • (search) Add aspiration windows at the root [bench 52298065] [elo +19 ±11 (sprt [0, 10] passed, 2000 games, 10+0.1, vs dcc9688)]
  • (search) Add a reduction table by depth and move count [bench 51236454] [elo +19 ±11 (sprt [0, 10] passed, 2000 games, 10+0.1, vs 5902681)]

Performance

  • (eval) Take the king attack counts in the mobility walk [bench 4102609] [speed +5.7% (bench nps, 21 interleaved rounds vs 02432c9, spread 12.2%)]
  • (search) Skip the stack sort for a list with no key and rotate one with a single key [bench 4102609] [speed +0.4% (bench nps, 7 interleaved rounds vs 6f32cbc, spread 4.1%)]
  • (board) Probe one slider line for legality where the move vacated a line through the king [bench 4102609] [speed +0.3% (bench nps, 7 interleaved rounds vs 0df6a31, spread 5.9%)]
  • (search) Build the late move node only where the node admits a reduction [bench 4102609] [speed +1.2% (bench nps, 7 interleaved rounds vs b10e2c0, spread 6.3%)]
  • (search) Put the transposition table on huge pages [bench 52298065] [speed -1.1% (bench nps, 5 interleaved rounds vs 273c5eb, spread 3.6%)]

Refactor

  • (uci) Read an instrument's suite in one place
  • (search) Move the late move reductions and pruning into one module [bench 4102609] [elo not measured]
  • (search) Make the principal variation exemption explicit [bench 4102609]
  • (search) Rename Edges to RootBounds and pin how the bits travel [bench 4102609]
  • (board) Derive the move number from the ply rather than keeping it [bench 52404553]
  • (eval) Fold every leaf term through one weigh [bench 52404553]
  • (board) Read recompute_checkers off the attacker helpers [bench 52404553]
  • (board) Hold the castle rights as four bits [bench 52404553]
  • (search) Share the sampling key, the share and the reference replay across the recorders [bench 52404553]
  • (uci) Read the depth and the taint word in one place each
  • (uci) Read every spin option through one reader from its row
  • (eval) Give the shelter and the pawn structure one direct mapped cache type [bench 52298065] [elo not measured]

Documentation

  • (search) Correct the claim that fail low nodes are not stored
  • (search) Shorten the comments in the search, the generator and the suites [bench 4102609]
  • (eval) Shorten the comments in the evaluation and the tuner [bench 4102609]
  • (board) Shorten the comments in the board and make/unmake [bench 4102609]
  • (uci) Shorten the comments in the protocol crate and its tests
  • (search) Record a third sort shape and the stored static evaluation as measured and priced
  • (uci) Give the terms row's formula every leaf term and the vector its width

Development

  • (search) Store and probe a mate score at a nonzero ply
  • (tactics) Add a floor under the suite and a list of accepted losses
  • (uci) Check an instrument takes the sampling rate it was given
  • (docs) Answer the mobility budget bullet and record two rejected arms
  • (ci) Pin the three tools that prepare a release
  • (uci) Pin what a terms argument takes and how it refuses
  • (uci) Name a suite the bench does not use when checking one is read
  • (bench) Split the attention fit by group and let a feature be dropped [bench 3868987]
  • (ci) Refuse to resolve a ref under a trigger that carries secrets
  • (ci) Shorten the comments in the workflows, the scripts and the manifests
  • (board) Add the three evasion shapes to the perft edge cases
  • (ci) Call the match orchestration out of mache rather than inlining it
  • (deps) Bump smallvec from 1.16.0 to 1.16.1 in the cargo group
  • (bench) Raise the bench depth from 7 to 9 [bench 52404553]
  • (release) Move the gauntlet up to bracket 2700 and add Blunder, Inanis and Zahak
  • (deps) Bump the mache actions from v0.2.0 to v0.3.0

Docker image: ghcr.io/aywrite/arche-lichess-bot:v0.4.5-rc.1 (sha256:300fc0ae6adffebd5b9cbacca2560188595cdb0b154a720f235df55236cf970d)

Performance compared to v0.4.4 | +71 ±23 Elo (500 games)

Estimated rating | 2661 ±32 (95%) on the ccrl blitz scale (400 games)