{
  "id": "aqua-regia",
  "title": "Aqua Regia",
  "catalogNo": "AGC · 013",
  "genre": "Code-breaking deduction game",
  "shelf": "duel",
  "summary": "A sealed formula-breaking duel against an AI that assays every batch against a locked code and never bluffs.",
  "tagline": "The guild master's last elixir is four measures poured in a fixed order, sealed before you ever reached the bench; mix trial batches, read the assay, and reproduce it.",
  "players": "1",
  "sessionMinutes": [
    15,
    25
  ],
  "rating": "All ages",
  "isFree": true,
  "playedIn": [
    "ChatGPT",
    "Claude",
    "Gemini"
  ],
  "status": "playable",
  "url": "https://aigamecards.com/games/aqua-regia/",
  "loadUrl": "https://aigamecards.com/g/aqua-regia/SYSTEM.md",
  "loadPrompt": "Let's play a game. Fetch https://aigamecards.com/g/aqua-regia/SYSTEM.md and run it as the game — it's a complete, self-contained prompt. Be the game master and begin.",
  "faq": [
    {
      "q": "What stops the AI from changing the formula when I get close?",
      "a": "The formula is fixed before play and committed with a SHA-256 hash the AI shows you before your first batch. Every SET/HAZE count is read from that locked formula, and you rebuild the hash from the revealed answer afterward to prove nothing moved."
    },
    {
      "q": "Is the AI actually any good at this?",
      "a": "Yes, because it is not being creative. It only checks each batch against one fixed formula using one fixed counting rule: SET is the measures right in both essence and rank, HAZE is the measures of a right essence in a wrong rank. There is nothing to improvise; it follows the same fixed procedure every time."
    },
    {
      "q": "How long is a game, and how hard is it?",
      "a": "About 15 to 25 minutes. The formula is four measures drawn from six essences with repeats allowed, so 1296 orders are possible, and you get 10 batches to reproduce it. It is a classic code-breaker: read the two counts, rule out orders, and close in."
    },
    {
      "q": "Do I need an account, an app, or a paid plan?",
      "a": "No. Paste the duel card into a chat with ChatGPT, Claude, or Gemini and play there. Verifying the seal afterward uses any SHA-256 tool, including ones built into your operating system."
    }
  ]
}