qortium-chess

Standard chess for Qortium: live play over fee-less CHAT messages with a hash-chained, client-verified move protocol (QCH1), and finished games published to QDN as portable, re-validatable archives. Successor to the Qortal-era Q-Chess prototype (protocol QC1), redesigned for the Qortium stack. Target publish: QDN name Chess / identifier Chess.

Status: scaffold — protocol core + local hot-seat board; no networking, not yet published.

Implemented so far:

• src/rules/ — ruleset-agnostic RulesAdapter with the classic ruleset on chess.js
• src/protocol/ — QCH1 types, envelope codec/validation, blake2b-256 hash chain (pinned vectors)
• src/game/ — GameService: lifecycle state machine, receive-side validation gates, send actions
• src/transport/ — transport seam + deterministic MemoryHub for tests/dev
• src/ui/ — local hot-seat board (the real chat transport is the next milestone)

npm install
npm test        # vitest: rules, hash vectors, full-lifecycle over memory transport
npm run build   # tsc + vite; emits dist/ with qortium-app.json + favicon.ico
npm run dev

• docs/QCH1-SPEC-DRAFT.md — protocol & app design draft (decision log in §11)
• docs/ENGINE-AUDIT-2026-07-20.md — audit of the J-Chess engine's classic-chess mode, which drove the rules-engine decision (chess.js for classic; J-Chess engine reserved as a future variant ruleset)
• engine-audit/ — reproducible audit harness (probes + differential sweep vs chess.js)