Bounded rules, not a complete engine. Supported outcomes are reported; an unresolved rule edge fails closed rather than inventing a result. Read the supported scope.
No notation compatibility. Long coordinates in, typed event records out; there is no FEN, PGN or SAN support.
Not a game UI. This site documents the library; the library ships no board, server, clock, opponent or AI.
QuaterniTS
A headless TypeScript rules library for the four-player game Quaternity. It models the rules for embedding and for rules research — it is not a UI, server, AI, board renderer or chess.js clone.
QuaterniTS is an unofficial, community-driven library. It is not
affiliated with, sponsored by, or endorsed by the rights holders of the
official Quaternity game or project, and it uses no official logos or visual
assets. Its MIT LICENSE
covers this project’s original work only — not third-party names, rules text,
trademarks, artwork or other assets.
Getting startedInstall the package and commit your first coordinate move.
Public APIThe Quaternity class, typed events, queries and the deliberate gaps.
Rules & examplesThe illustrated starting position and coordinate examples.
SnapshotsThe versioned V1 JSON persistence document, replay and strict loading.
What this is
Section titled “What this is”A headless TypeScript library that generates and validates legal moves, holds a position and reports game state for the four-player 12 × 12 game. It is intended for applications and for the education and research of the game’s rules.
What this is not
Section titled “What this is not”An explicit rule boundary
Section titled “An explicit rule boundary”When a checked controller has an apparent defence but no safe move after a
mate and army-transfer cascade, the library rejects the unresolved action with
UnresolvedAdjudicationError without changing the game. This software error
is not a mate, pass or draw. The official outcome remains unknown; the
supported scope explains the bounded contract and links
to a concrete position.