SanderGi/Ultimate-Fish-Tablebases

Ultimate Fish endgame tablebases

This gated dataset is the authenticated tablebase catalog used by the Ultimate Fish engine and its local tablebase manager. The tables contain exact win/draw/loss and distance-to-win results for certified Chess Ultimate endgames.

Native rules repair — 2026-09-12

The Checker and Sniper closures and their Jester/Ghost information proofs have been recomputed for native flying Checker Kings and turn-start threat timing. All twelve Devil partitions have fresh outcomes and distances, verified against the corrected native terminal rules. Historical sorted Devil keys were reused; historical outcomes were discarded and every successor was checked for closure.

Affected .uftb tables use UFTB version 12 with a rule-revision codec tag. The Devil records use UFDS version 2. Update the engine before installing these files; the corrected engine rejects the older affected formats. All other certified payloads are unchanged. The repair proof inventory is stored in certificates/ultimate-rules-repair-20260912.json.

Information plot orientation correction — 2026-09-14

The opposed Ghost/Checker and Ghost/Sniper root audits previously interpreted the UFIW2 secondary-piece color as the Ghost owner's color, reversing W/L. The audit reader and plot metadata are corrected. Every repaired information overlay now passes exact solver-versus-audit W/L/D equality for each side before trivial-position filtering. The certificate records those checks. All tablebase and information payload bytes remain unchanged; no solve was repeated. UFIW2 byte 20 denotes secondary color, with the primary normalized White; Ghost force bits denote owner/observer, and Jester bits White/Black.

Lone-Ghost native input and progress certificate — 2026-09-14

The previous kghostk.uftb used obsolete invisible-Ghost capture rules and failed 36,760 native Bellman/singleton comparisons. It is replaced by the exhaustively regenerated 11b7b57a… payload that matches the retained UFGM concrete binding. kghostk.ufiw and kghostk.ufgm are regenerated, and kghostk.ufrp stores certified first-activation reachability ranks.

All 49 activation layers, the full symbolic Bellman equations, all 1,971,840 singletons, and full rank serialization passed validation. The force diagram is equivalent to the retained reference over all masks. An independent native sample covered 17,270 edges; runtime tests completed eight owner games and checked both strategies, colors, reflections, selected actions and repetition rejection. The sample supplements the exhaustive generator proof.

This release covers lone-Ghost masks in supported observation cells. UFIW remains a fresh-root overlay; absence of either force remains unresolved. Other materials have no new progress certification in this release. Arbitrary repetition history requires the runtime's separate complete-policy check. Hashes and source/model bindings are in the certificate.

Lone-Jester finite progress ranks — 2026-09-14

kjesterk.ufrp preserves the finite solver's activation ranks for all supported indistinguishable royal pairs. The concrete table regenerated with the same published hash; all 985,920 fresh-root payload bytes also match the previous UFIW. The new UFIW header binds the rank-preserving source model.

The complete fixed point and rank serialization passed. An exhaustive native runtime audit covered 412,600 information cells and 7,914,824 edges, including irreversible identity disclosure and concrete suffixes, with zero progress residual. Runtime tests completed eight Jester-owner games (120 progressing actions) across both strategies, colors and reflections.

No still-ambiguous bare-King pair has a guaranteed win in this certificate. Neither-force outcomes remain unresolved. Repetition history still requires the runtime's separate complete-policy proof; four-piece Jester and other material progress coverage is not supplied by this release. Full bindings and limitations are in the certificate.

Bishop/Ghost concrete input repair — 2026-09-14

kbishopkghost.uftb now matches the native rules and the concrete hash already bound by both published information companions. Exhaustive regeneration verified 75,915,840 states and 931,510,904 edges, including WDL and DTW. The obsolete published payload differs at 232,580 WDL entries. The UFIW and UFGX companions are unchanged; this release does not add information progress ranks or certify new history-aware policies. See the repair certificate.

File roles

• tablebases/*.uftb are the ordinary runtime tables probed by the engine.
• tablebases/kdevilk-{a1..d3}.ufds are the twelve logical fixed-square partitions of the certified stateful King+Devil+causally-spawned-Minions vs King class. Partitions below the hosting service's 50 GB object limit are stored directly. Larger partitions use an authenticated .ufdsm manifest plus ordered .ufdsp transport shards. The manager verifies every shard, reconstructs and verifies the certificate-bound canonical .ufds, removes the transport shards, and only then installs it. All twelve canonical partitions are one logical runtime table and must be installed together.
• Files such as .ufiw, .ufgd, and the other uf* sidecars are authenticated proof/dependency data. The manager installs sidecars with their table; they are not substitutes for a runtime .uftb or .ufds file.
• certificates/ultimate-devil-stateful-class-certificate.json binds the exact twelve Devil partitions, their sizes, SHA-256 hashes, outcome censuses, and aggregate conservation result.
• manifests/tablebases-sha256.json is the machine-readable, revision-bound catalog of every managed artifact.

Every managed artifact is stored with a Hugging Face LFS SHA-256. The Ultimate Fish manager refuses catalog entries without that digest, validates shard manifests and byte conservation, verifies the complete logical download, and only then atomically installs it.

Install and probe

Request access to this dataset and authenticate the Hugging Face CLI. Start the local engine bridge with ULTIMATE_TABLEBASE_PATH set to the desired tablebase directory, then use the Tablebases panel in the Ultimate Fish UI to install or remove endgames. For example:

cd ui
ULTIMATE_TABLEBASE_PATH=/absolute/path/to/tablebases npm run engine

The engine scans tablebases/ by default and accepts a colon-separated ULTIMATE_TABLEBASE_PATH. It probes only codec-compatible, structurally valid files and fails closed on malformed headers, extents, ordering, or stateful Devil records. Files installed while the local bridge is running are picked up by a clean engine reload before the next queued operation.

See the repository's tablebases/README.md for the authoritative class ledger, model exclusions, and certification notes.