Traitcraft · Quarto Duel Source: https://github.com/tkshill/Quarto Pinned commit: 5e40d7601e8533661be718e415601718a5c9509f MIT License. Copyright (c) 2020 tkshill. Full license in LICENSE.txt. Port of src/Game/Core.elm, Game/Board.elm and Game.elm: sixteen four-attribute pieces, ten winning lines, common-trait intersection, alternating gift/place phases and automatic wins/draws. Native JavaScript bitsets implement the same attribute intersection. Adaptations: replaces Elm SPA/build/development assumptions with native modules; adds responsive original SVG pieces/table UI, tactical computer instead of random computer, local two-player, undo and saved state. All assets local. No server or external runtime dependencies. Readable preferred source is app.mjs and engine.mjs. Quarto board game designed by Blaise Müller. Independent adaptation; no affiliation or endorsement. Metadata tags: github-source, game.