# Wyrm

Gary Gygax's Dragonchess, from Dragon Magazine No. 100 (August 1985), for
the browser: three boards of twelve by eight, Gold against Scarlet, 42
pieces a side, checkmate to win. Built from the game kit, so the hall, the
tables, the Peanut Gallery, the ledgers and the ops tools are the kit's;
`docs/conventions.md` is the house style they follow.

## What is where

    docs/source.md              the article, transcribed, and the readings the engine takes where it is unclear
    src/lib/game/board.ts       the three boards and how every piece moves, on a bare array of cells
    src/lib/game/index.ts       the game around them: seats, turns, check and the ends, the GameSpec
    src/lib/game/bot.ts         the drake, the house player: alpha-beta over a fixed budget of nodes
    src/lib/game/index.test.ts  every example move Gygax gives, the ends, and the drake
    src/lib/source.ts           reads docs/source.md for the rules page, so the page and the engine share one text
    src/lib/components/BoardArtwork.svelte   the boards drawn, shared by the table, the hall and the share card
    src/lib/components/Board.svelte          the table: moving, the record, the talk
    docs/og-card.html, docs/icon.html        the share card and the icon; screenshot them with the site running

## Where it differs from the kit

- The house player is **a drake** wherever the kit says "a bot", and its
  names are the dragons of old stories.
- Board 3 is the air, 2 the land and 1 the underworld, following the
  piece descriptions and not the one paragraph that says otherwise. The
  other readings are listed under "Decisions" in `docs/source.md` and on
  the rules page.
- The drake's search is bounded by a count of nodes, not a clock, so the
  same position always gives the same move and a ledger replays without
  asking it again.
- The glass board, `src/lib/components/Glass.svelte`, draws a game as three
  sheets of tinted glass with figures standing on them, in three.js, and
  takes the same taps as the flat boards. The figures in `static/figures/`
  are glTF, one per kind, with a `livery` material the view recolours per
  side; `docs/figures-brief.md` is what they were made from. three.js and
  the figures load only when the view is opened. Until the keeper opens it
  to everyone, the view shows only to a browser let in through
  `src/lib/glass.svelte.ts`.
- The guide's figures are screenshots in `static/guide/`, taken from the
  running site at 960 pixels wide.

## Running it

    npm run dev:all       # the server on 8791 and the site on 5173
    npm test              # the engine and the server
    deploy/deploy.sh 159.203.115.252

The name is this site's. Dragonchess was Gygax's and TSR's, and a Canadian
company holds a registered mark on "Dragon Chess" for an unrelated game.