From de0e891b62eca892564a4fb49f020a0067d4eb04 Mon Sep 17 00:00:00 2001
From: pavel444-byte <pavel.melnikov.kid.1993@gmail.com>
Date: Tue, 20 Oct 2026 14:05:01 +0500
Subject: [PATCH] Add Void difficulty and publish changelogs

---
 .env.example                                  |   4 +
 app/about/page.tsx                            |   2 +-
 app/appearance.css                            |  33 ++++-
 app/changelogs/page.tsx                       |  77 ++++++++++
 app/dashboard/page.tsx                        |   2 +-
 app/globals.css                               |  10 ++
 app/leaderboard/page.tsx                      |   2 +-
 components/ChangelogRefresh.tsx               |  19 +++
 components/Game.tsx                           |  17 ++-
 components/GuessMap.tsx                       |  47 +++++-
 components/MultiplayerGame.tsx                |  27 ++--
 components/ReleaseNotes.tsx                   |  45 ++++++
 components/Shell.tsx                          |   1 +
 components/SiteNav.tsx                        |   1 +
 components/StartGame.tsx                      |  20 ++-
 components/TournamentLobby.tsx                |  24 ++--
 docs/changelogs.md                            |  23 +++
 docs/tournaments.md                           |   2 +-
 lib/api.ts                                    |  16 ++-
 lib/changelog-feed.ts                         |  76 ++++++++++
 lib/changelog.ts                              |  21 +++
 lib/service-error.ts                          |   2 +-
 scripts/test-difficulty-presets-sql.mjs       |  90 +++++++++++-
 scripts/test-tournaments-sql.mjs              |  25 ++++
 shared/changelog.ts                           |  51 +++++++
 shared/database.ts                            |   6 +
 shared/developer-openapi.ts                   |   5 +-
 shared/leaderboard.ts                         |   1 +
 shared/locales/ru.json                        |  21 ++-
 shared/multiplayer.ts                         |   2 +-
 shared/prometheus.ts                          |   2 +-
 shared/protocol.ts                            |  22 ++-
 shared/tournaments.ts                         |  11 +-
 .../20261020083343_void_difficulty_rules.sql  | 135 +++++++++++++++++
 tests/changelog.test.ts                       | 136 ++++++++++++++++++
 tests/difficulty-presets.test.ts              |  78 +++++++++-
 tests/prometheus.test.ts                      |   4 +-
 37 files changed, 995 insertions(+), 65 deletions(-)
 create mode 100644 app/changelogs/page.tsx
 create mode 100644 components/ChangelogRefresh.tsx
 create mode 100644 components/ReleaseNotes.tsx
 create mode 100644 docs/changelogs.md
 create mode 100644 lib/changelog-feed.ts
 create mode 100644 lib/changelog.ts
 create mode 100644 shared/changelog.ts
 create mode 100644 supabase/migrations/20261020083343_void_difficulty_rules.sql
 create mode 100644 tests/changelog.test.ts

diff --git a/.env.example b/.env.example
index 6dfe805..e0cc1a0 100644
--- a/.env.example
+++ b/.env.example
@@ -17,6 +17,10 @@ MINEGEO_FORUM_URL=
 DISCORD_BOT_TOKEN=
 DISCORD_MAPS_CHANNEL_ID=
 DISCORD_PARTIES_CHANNEL_ID=
+# Optional overrides for the read-only changelog (defaults to MineGeo news and release webhook).
+# The existing bot requires View Channel and Read Message History there.
+DISCORD_NEWS_CHANNEL_ID=
+DISCORD_RELEASE_WEBHOOK_ID=
 # Optional bearer secret for scheduled GET /api/integrations/discord/dispatch retries.
 CRON_SECRET=
 # Development testing only; production rejects this bypass of CSRF protection.
diff --git a/app/about/page.tsx b/app/about/page.tsx
index ff98f8d..dde7b57 100644
--- a/app/about/page.tsx
+++ b/app/about/page.tsx
@@ -33,7 +33,7 @@ export default async function About() {
         <h2>{t("Five chances to find your way")}</h2>
         <p>
           {t(
-            "Easy gives you 180 seconds, Normal 90, and Hard 30. Hard disables zoom. A timed-out round scores zero; you can still finish the expedition.",
+            "Easy gives you 180 seconds, Normal 90, and Hard 30. Void is the hardest: just 10 seconds, a fixed panorama and map, no zoom, no compass or coordinates, and strict scoring. A timed-out round scores zero; you can still finish the expedition.",
           )}
         </p>
         <h2>{t("Closer means better")}</h2>
diff --git a/app/appearance.css b/app/appearance.css
index 8bd0aec..6303d1a 100644
--- a/app/appearance.css
+++ b/app/appearance.css
@@ -384,7 +384,10 @@ html[data-theme="light"] .site-cursor-dot span {
   background: #273b21;
   box-shadow: 0 0 1px #fff;
 }
-@media (max-width: 1200px) {
+.header-inner {
+  max-width: 1600px;
+}
+@media (max-width: 1500px) {
   .site-header {
     height: auto;
   }
@@ -458,3 +461,31 @@ html[data-theme="light"] .site-cursor-dot span {
     grid-row: 3;
   }
 }
+.difficulty-options button.difficulty-void {
+  border-color: #a855f7;
+  background: linear-gradient(145deg, #21122f, #100c18);
+  color: #e9d5ff;
+  box-shadow: 0 0 16px #a855f738, inset 0 0 20px #a855f710;
+}
+.difficulty-options button.difficulty-void strong {
+  color: #e9d5ff;
+  text-shadow: 0 0 10px #c084fc99, 0 0 22px #a855f780;
+}
+.difficulty-options button.difficulty-void.selected,
+html[data-theme="light"] .difficulty-options button.difficulty-void.selected {
+  color: #f3e8ff;
+  background: linear-gradient(145deg, #482363, #21122f);
+  border-color: #d8b4fe;
+  box-shadow: 0 0 24px #a855f760, inset 0 0 20px #c084fc18;
+}
+html[data-theme="light"] .difficulty-options button.difficulty-void {
+  background: #f3e8ff;
+  border-color: #a855f7;
+  color: #581c87;
+}
+html[data-theme="light"] .difficulty-options button.difficulty-void strong {
+  color: #7e22ce;
+}
+html[data-theme="light"] .difficulty-options button.difficulty-void.selected strong {
+  color: #f3e8ff;
+}
diff --git a/app/changelogs/page.tsx b/app/changelogs/page.tsx
new file mode 100644
index 0000000..945c2c4
--- /dev/null
+++ b/app/changelogs/page.tsx
@@ -0,0 +1,77 @@
+import Link from "next/link";
+import type { Metadata } from "next";
+import { Header, Footer } from "@/components/Shell";
+import { ReleaseNotes } from "@/components/ReleaseNotes";
+import { ChangelogRefresh } from "@/components/ChangelogRefresh";
+import { getChangelog } from "@/lib/changelog";
+import { getI18n } from "@/lib/i18n";
+
+export const metadata: Metadata = {
+  title: "Changelogs",
+  description: "The latest MineGeo releases, improvements, and bug fixes.",
+};
+
+export default async function ChangelogsPage({
+  searchParams,
+}: {
+  searchParams: Promise<{ before?: string }>;
+}) {
+  const params = await searchParams;
+  const before =
+    typeof params.before === "string" && /^\d{17,20}$/.test(params.before)
+      ? params.before
+      : undefined;
+  const [{ t, formatDate }, feed] = await Promise.all([
+    getI18n(),
+    getChangelog(before),
+  ]);
+  return (
+    <>
+      <Header />
+      <main className="section page-content changelog-page">
+        {!before && <ChangelogRefresh />}
+        <span className="eyebrow">{t("WHAT'S NEW")}</span>
+        <h1>{t("Changelogs")}</h1>
+        <p className="lead">
+          {t("New releases, improvements, and fixes from MineGeo.")}
+        </p>
+        {before && <Link href="/changelogs">{t("Latest releases")}</Link>}
+        {feed.unavailable ? (
+          <div className="empty-state">
+            <h2>{t("Release notes are temporarily unavailable")}</h2>
+            <p>{t("Please check back soon.")}</p>
+          </div>
+        ) : feed.entries.length === 0 ? (
+          <p className="muted">{t("No releases on this page yet.")}</p>
+        ) : (
+          <div className="changelog-list">
+            {feed.entries.map((entry) => (
+              <article
+                className="changelog-entry"
+                key={entry.id}
+                id={`release-${entry.id}`}
+              >
+                <div className="changelog-meta">
+                  <span className="tag">{t(entry.kind)}</span>
+                  <time dateTime={entry.publishedAt}>
+                    {formatDate(entry.publishedAt)}
+                  </time>
+                </div>
+                <h2>{entry.title}</h2>
+                <div className="release-notes">
+                  <ReleaseNotes body={entry.body} />
+                </div>
+              </article>
+            ))}
+          </div>
+        )}
+        {!feed.unavailable && "before" in feed && feed.before && (
+          <Link className="button" href={`/changelogs?before=${feed.before}`}>
+            {t("Older posts")}
+          </Link>
+        )}
+      </main>
+      <Footer />
+    </>
+  );
+}
diff --git a/app/dashboard/page.tsx b/app/dashboard/page.tsx
index 74164db..9ea5aae 100644
--- a/app/dashboard/page.tsx
+++ b/app/dashboard/page.tsx
@@ -56,7 +56,7 @@ export default async function DashboardPage() {
                       typeof s.difficulty_settings === "object" &&
                       !Array.isArray(s.difficulty_settings) &&
                       typeof s.difficulty_settings.name === "string"
-                        ? ["easy", "normal", "hard"].includes(s.difficulty)
+                        ? ["easy", "normal", "hard", "void"].includes(s.difficulty)
                           ? t(s.difficulty_settings.name)
                           : s.difficulty_settings.name
                         : t(
diff --git a/app/globals.css b/app/globals.css
index fc3c824..ea06e94 100644
--- a/app/globals.css
+++ b/app/globals.css
@@ -1745,3 +1745,13 @@ pre {
   display: block;
   position: relative;
 }
+
+.changelog-page { max-width: 960px; }
+.changelog-list { margin: 36px 0; }
+.changelog-entry { padding: 32px 0; border-top: 1px solid var(--line); scroll-margin-top: 100px; }
+.changelog-entry h2 { margin: 14px 0 20px; font-size: clamp(1.4rem, 3vw, 2rem); }
+.changelog-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 16px; color: var(--muted); font-size: .85rem; }
+.release-notes { line-height: 1.8; overflow-wrap: anywhere; }
+.release-notes ul { padding-left: 24px; }
+.release-notes li + li { margin-top: 12px; }
+.release-notes p { white-space: normal; }
diff --git a/app/leaderboard/page.tsx b/app/leaderboard/page.tsx
index 3fbfb36..25ee5e7 100644
--- a/app/leaderboard/page.tsx
+++ b/app/leaderboard/page.tsx
@@ -23,7 +23,7 @@ export async function generateMetadata(): Promise<Metadata> {
   return {
     title: t("Leaderboard"),
     description: t(
-      "Meet MineGeo’s top explorers. Compare the best five-round scores across easy, normal, and hard Minecraft expeditions.",
+      "Meet MineGeo’s top explorers. Compare the best five-round scores across Easy, Normal, Hard, and Void Minecraft expeditions.",
     ),
   };
 }
diff --git a/components/ChangelogRefresh.tsx b/components/ChangelogRefresh.tsx
new file mode 100644
index 0000000..f9fd407
--- /dev/null
+++ b/components/ChangelogRefresh.tsx
@@ -0,0 +1,19 @@
+"use client";
+import { useEffect } from "react";
+import { useRouter } from "next/navigation";
+
+export function ChangelogRefresh() {
+  const router = useRouter();
+  useEffect(() => {
+    const refresh = () => {
+      if (document.visibilityState === "visible") router.refresh();
+    };
+    const timer = window.setInterval(refresh, 65_000);
+    document.addEventListener("visibilitychange", refresh);
+    return () => {
+      window.clearInterval(timer);
+      document.removeEventListener("visibilitychange", refresh);
+    };
+  }, [router]);
+  return null;
+}
diff --git a/components/Game.tsx b/components/Game.tsx
index d846291..560f1a2 100644
--- a/components/Game.tsx
+++ b/components/Game.tsx
@@ -217,13 +217,15 @@ export function Game({ id }: { id: string }) {
             <small>{t("ROUND")}</small>
             <strong>{session ? session.round + 1 : "—"} / 5</strong>
           </div>
-          <div>
-            <small>{t("TIME LEFT")}</small>
-            <strong className={remaining <= 10 ? "urgent" : ""}>
-              {Math.floor(remaining / 60)}:
-              {String(remaining % 60).padStart(2, "0")}
-            </strong>
-          </div>
+          {session?.difficultySettings.timerVisible !== false && (
+            <div>
+              <small>{t("TIME LEFT")}</small>
+              <strong className={remaining <= 10 ? "urgent" : ""}>
+                {Math.floor(remaining / 60)}:
+                {String(remaining % 60).padStart(2, "0")}
+              </strong>
+            </div>
+          )}
           <div>
             <small>{t("POINTS")}</small>
             <strong>{formatNumber(total)}</strong>
@@ -273,6 +275,7 @@ export function Game({ id }: { id: string }) {
               onError={onError}
               disabled={!!result || busy}
               zoom={session.difficultySettings.mapZoom}
+              pan={session.difficultySettings.mapPan}
               compass={session.difficultySettings.compass}
             />
             <div className="map-actions">
diff --git a/components/GuessMap.tsx b/components/GuessMap.tsx
index 8ae3fc0..b658f38 100644
--- a/components/GuessMap.tsx
+++ b/components/GuessMap.tsx
@@ -16,6 +16,7 @@ export function GuessMap({
   onError,
   disabled = false,
   zoom = true,
+  pan = true,
   compass = true,
 }: {
   bounds: Bounds;
@@ -27,6 +28,7 @@ export function GuessMap({
   onError?: (message: string) => void;
   disabled?: boolean;
   zoom?: boolean;
+  pan?: boolean;
   compass?: boolean;
 }) {
   const { t } = useI18n();
@@ -68,11 +70,16 @@ export function GuessMap({
           touchZoom: zoom,
           doubleClickZoom: zoom,
           boxZoom: zoom,
+          dragging: pan,
+          keyboard: false,
         });
         if (zoom)
           L.control
             .zoom({ zoomInTitle: t("Zoom in"), zoomOutTitle: t("Zoom out") })
             .addTo(m);
+        // Leaflet's keyboard handler couples panning and +/- zoom. Gate them
+        // separately so a fixed map cannot be moved or zoomed by keyboard.
+        if (pan && zoom) m.keyboard.enable();
         // Install cleanup immediately, including when later initialization fails.
         let observer: ResizeObserver | undefined;
         cleanup = () => {
@@ -119,6 +126,29 @@ export function GuessMap({
             callbacks.current.onPin?.({ x, z });
         });
         const keydown = (event: KeyboardEvent) => {
+          if (
+            event.target === m.getContainer() &&
+            pan &&
+            !zoom &&
+            ["ArrowUp", "ArrowDown", "ArrowLeft", "ArrowRight"].includes(
+              event.key,
+            )
+          ) {
+            event.preventDefault();
+            m.panBy([
+              event.key === "ArrowLeft"
+                ? -80
+                : event.key === "ArrowRight"
+                  ? 80
+                  : 0,
+              event.key === "ArrowUp"
+                ? -80
+                : event.key === "ArrowDown"
+                  ? 80
+                  : 0,
+            ]);
+            return;
+          }
           if (
             event.key !== "Enter" ||
             event.target !== m.getContainer() ||
@@ -171,6 +201,7 @@ export function GuessMap({
     image,
     attempt,
     zoom,
+    pan,
   ]);
   useEffect(() => {
     const L = lib.current,
@@ -204,15 +235,19 @@ export function GuessMap({
         style={{ height: "100%", width: "100%" }}
         role="application"
         aria-label={
-          !compass
+          !pan
             ? t(
-                "Minecraft map. Click to place a guess, or use arrow keys to pan and Enter to pin the center.",
+                "Minecraft map. Click to place a guess, or press Enter to pin the center.",
               )
-            : disabled
-              ? t("Minecraft map. North is up.")
-              : t(
-                  "Minecraft map. North is up. Click to place a guess, or use arrow keys to pan and Enter to pin the center.",
+            : !compass
+              ? t(
+                  "Minecraft map. Click to place a guess, or use arrow keys to pan and Enter to pin the center.",
                 )
+              : disabled
+                ? t("Minecraft map. North is up.")
+                : t(
+                    "Minecraft map. North is up. Click to place a guess, or use arrow keys to pan and Enter to pin the center.",
+                  )
         }
       />
       {error && (
diff --git a/components/MultiplayerGame.tsx b/components/MultiplayerGame.tsx
index 3db0db1..a31f8c7 100644
--- a/components/MultiplayerGame.tsx
+++ b/components/MultiplayerGame.tsx
@@ -125,18 +125,20 @@ export function MultiplayerGame({
             <small>{t("ROUND")}</small>
             <strong>{room.round + 1} / 5</strong>
           </div>
-          <div>
-            <small>{t("TIME LEFT")}</small>
-            <strong
-              className={
-                room.status === "playing" && seconds <= 10 ? "urgent" : ""
-              }
-            >
-              {room.status === "loading"
-                ? t("Loading…")
-                : `${Math.floor(seconds / 60)}:${String(seconds % 60).padStart(2, "0")}`}
-            </strong>
-          </div>
+          {room.difficultySettings.timerVisible !== false && (
+            <div>
+              <small>{t("TIME LEFT")}</small>
+              <strong
+                className={
+                  room.status === "playing" && seconds <= 10 ? "urgent" : ""
+                }
+              >
+                {room.status === "loading"
+                  ? t("Loading…")
+                  : `${Math.floor(seconds / 60)}:${String(seconds % 60).padStart(2, "0")}`}
+              </strong>
+            </div>
+          )}
           <div>
             <small>{t("POINTS")}</small>
             <strong>{formatNumber(me?.total ?? 0)}</strong>
@@ -214,6 +216,7 @@ export function MultiplayerGame({
               onReady={mapReady}
               onError={mediaError}
               zoom={room.difficultySettings.mapZoom}
+              pan={room.difficultySettings.mapPan}
               compass={room.difficultySettings.compass}
               disabled={
                 room.status !== "playing" || submitted || busy || seconds === 0
diff --git a/components/ReleaseNotes.tsx b/components/ReleaseNotes.tsx
new file mode 100644
index 0000000..0f069dc
--- /dev/null
+++ b/components/ReleaseNotes.tsx
@@ -0,0 +1,45 @@
+import { Fragment } from "react";
+
+// Render a small, safe subset of Discord Markdown; React escapes raw HTML.
+function inline(text: string) {
+  return text
+    .split(/(\*\*[^*]+\*\*|`[^`]+`|\[[^\]]+\]\(https?:\/\/[^\s)]+\))/g)
+    .map((part, i) => {
+      if (part.startsWith("**") && part.endsWith("**"))
+        return <strong key={i}>{part.slice(2, -2)}</strong>;
+      if (part.startsWith("`") && part.endsWith("`"))
+        return <code key={i}>{part.slice(1, -1)}</code>;
+      const link = /^\[([^\]]+)\]\((https?:\/\/[^\s)]+)\)$/.exec(part);
+      if (link)
+        return (
+          <a key={i} href={link[2]} target="_blank" rel="noopener noreferrer">
+            {link[1]}
+          </a>
+        );
+      return <Fragment key={i}>{part}</Fragment>;
+    });
+}
+
+export function ReleaseNotes({ body }: { body: string }) {
+  return body.split(/\r?\n\s*\r?\n/).map((block, i) => {
+    const lines = block.split(/\r?\n/);
+    if (lines.every((line) => /^\s*[-*]\s+/.test(line)))
+      return (
+        <ul key={i}>
+          {lines.map((line, j) => (
+            <li key={j}>{inline(line.replace(/^\s*[-*]\s+/, ""))}</li>
+          ))}
+        </ul>
+      );
+    return (
+      <p key={i}>
+        {lines.map((line, j) => (
+          <Fragment key={j}>
+            {j > 0 && <br />}
+            {inline(line)}
+          </Fragment>
+        ))}
+      </p>
+    );
+  });
+}
diff --git a/components/Shell.tsx b/components/Shell.tsx
index 8db1843..0b1a512 100644
--- a/components/Shell.tsx
+++ b/components/Shell.tsx
@@ -59,6 +59,7 @@ export async function Footer() {
         <LanguageSwitcher />
         <Link href="/downloads">{t("Tools & downloads")}</Link>
         <Link href="/docs">{t("Docs")}</Link>
+        <Link href="/changelogs">{t("Changelogs")}</Link>
         {forum && (
           <a href={forum} target="_blank" rel="noopener noreferrer">
             {t("Forum")}
diff --git a/components/SiteNav.tsx b/components/SiteNav.tsx
index 397d882..e35ce26 100644
--- a/components/SiteNav.tsx
+++ b/components/SiteNav.tsx
@@ -8,6 +8,7 @@ const links = [
   ["/servers", "Play & maps"],
   ["/leaderboard", "Leaderboard"],
   ["/tournaments", "Tournaments"],
+  ["/changelogs", "Changelogs"],
   ["/downloads", "Downloads"],
   ["/about", "Guide"],
   ["/docs", "Docs"],
diff --git a/components/StartGame.tsx b/components/StartGame.tsx
index 16480ba..e2cfc09 100644
--- a/components/StartGame.tsx
+++ b/components/StartGame.tsx
@@ -34,6 +34,8 @@ export function StartGame({
       compass: boolean;
       coordinates: boolean;
       mapZoom: boolean;
+      mapPan: boolean;
+      timerVisible: boolean;
       scoring: ScoringMode;
     }>(difficultyRuleDefaults),
     [savingDifficulty, setSavingDifficulty] = useState(false),
@@ -63,6 +65,8 @@ export function StartGame({
   }, []);
   const options: DifficultyPreset[] = [
     ...Object.entries(difficulties).map(([id, preset]) => ({
+      ...difficultyRuleDefaults,
+      ...preset,
       id,
       name: preset.label,
       seconds: preset.seconds,
@@ -169,7 +173,10 @@ export function StartGame({
           <button
             key={option.id}
             aria-pressed={difficulty === option.id}
-            className={difficulty === option.id ? "selected" : ""}
+            className={[
+              difficulty === option.id ? "selected" : "",
+              option.id === "void" ? "difficulty-void" : "",
+            ].join(" ")}
             disabled={loading}
             onClick={() => setDifficulty(option.id)}
           >
@@ -185,7 +192,7 @@ export function StartGame({
               <ZoomIn size={13} />
               {option.zoom ? t("Zoom allowed") : t("No zoom")}
             </span>
-            {!(option.id in difficulties) && (
+            {(!(option.id in difficulties) || option.id === "void") && (
               <span>
                 {t(
                   option.scoring === "strict"
@@ -197,6 +204,9 @@ export function StartGame({
                 · {t(option.pan === false ? "Fixed view" : "Panning allowed")}
               </span>
             )}
+            {option.id === "void" && (
+              <span>{t("Hardest · No compass · Fixed map")}</span>
+            )}
           </button>
         ))}
       </div>
@@ -238,9 +248,9 @@ export function StartGame({
               <input
                 id="custom-difficulty-seconds"
                 type="number"
-                min={15}
+                min={5}
                 max={600}
-                step={15}
+                step={5}
                 value={difficultySeconds}
                 onChange={(event) =>
                   setDifficultySeconds(Number(event.target.value))
@@ -265,6 +275,8 @@ export function StartGame({
                 ["compass", "Show north indicator"],
                 ["coordinates", "Show guess coordinates"],
                 ["mapZoom", "Allow guess-map zoom"],
+                ["mapPan", "Allow guess-map panning"],
+                ["timerVisible", "Show round countdown"],
               ] as const
             ).map(([key, label]) => (
               <label className="difficulty-builder-zoom" key={key}>
diff --git a/components/TournamentLobby.tsx b/components/TournamentLobby.tsx
index 6215f68..79b3347 100644
--- a/components/TournamentLobby.tsx
+++ b/components/TournamentLobby.tsx
@@ -56,6 +56,7 @@ export function TournamentIndex({
   const [clock, setClock] = useState(0);
   const [timerMode, setTimerMode] = useState<"shared" | "perMini">("shared");
   const [roundSeconds, setRoundSeconds] = useState(450);
+  const [difficulty, setDifficulty] = useState("normal");
   const offset = useRef(0);
   const load = useCallback(async () => {
     try {
@@ -115,8 +116,8 @@ export function TournamentIndex({
         difficulty: form.get("difficulty"),
         playerLimit: Number(form.get("limit")),
         roundCount: Number(form.get("rounds")),
-        roundTimeSeconds: Number(form.get("seconds")),
-        timerMode: form.get("timerMode"),
+        roundTimeSeconds: difficulty === "void" ? 10 : roundSeconds,
+        timerMode: difficulty === "void" ? "perMini" : timerMode,
         startsAt: serverLocalToIso(
           String(form.get("start")),
           events.serverTimezone,
@@ -211,10 +212,15 @@ export function TournamentIndex({
           </label>
           <label>
             {t("Difficulty")}
-            <select name="difficulty" defaultValue="normal">
+            <select
+              name="difficulty"
+              value={difficulty}
+              onChange={(event) => setDifficulty(event.target.value)}
+            >
               <option value="easy">{t("Easy")}</option>
               <option value="normal">{t("Normal")}</option>
               <option value="hard">{t("Hard")}</option>
+              <option value="void">{t("Void")}</option>
               {presets.map((preset) => (
                 <option key={preset.id} value={preset.id}>
                   {preset.name}
@@ -248,7 +254,8 @@ export function TournamentIndex({
             {t("Timer mode")}
             <select
               name="timerMode"
-              value={timerMode}
+              value={difficulty === "void" ? "perMini" : timerMode}
+              disabled={difficulty === "void"}
               onChange={(e) => {
                 const mode = e.target.value as "shared" | "perMini";
                 setTimerMode(mode);
@@ -265,17 +272,18 @@ export function TournamentIndex({
           </label>
           <label>
             {t(
-              timerMode === "shared"
+              difficulty !== "void" && timerMode === "shared"
                 ? "Seconds per tournament round"
                 : "Seconds per mini-round",
             )}
             <input
               name="seconds"
               type="number"
-              min={15}
+              min={difficulty === "void" ? 10 : 15}
               max={timerMode === "shared" ? 3000 : 600}
-              step={15}
-              value={roundSeconds}
+              step={difficulty === "void" ? 5 : 15}
+              value={difficulty === "void" ? 10 : roundSeconds}
+              disabled={difficulty === "void"}
               onChange={(e) => setRoundSeconds(Number(e.target.value))}
               required
             />
diff --git a/docs/changelogs.md b/docs/changelogs.md
new file mode 100644
index 0000000..365acbb
--- /dev/null
+++ b/docs/changelogs.md
@@ -0,0 +1,23 @@
+# Release changelogs
+
+`/changelogs` reads messages from MineGeo's `___news___` channel (`1558048830770122772`).
+Only release posts from webhook ID `1561021045211660401` appear. The bot only reads
+message history using GET; this feature never sends, edits, or deletes Discord messages.
+The webhook URL and its secret token are not needed or stored by the reader.
+
+Use the existing server-only `DISCORD_BOT_TOKEN` with View Channel and Read Message
+History in news. Enable Message Content Intent in Discord Developer Portal → Bot;
+otherwise Discord redacts the webhook messages' text. Optional `DISCORD_NEWS_CHANNEL_ID` and `DISCORD_RELEASE_WEBHOOK_ID`
+override the defaults. Never prefix these variables with `NEXT_PUBLIC_`.
+
+The feed accepts `## MineGeo 1.0.4 Alpha`, `Beta`, `Production`, and four-part
+`Bug fix` headings. It removes role mentions, leading separators, and the trailing
+`PLAY THE MINEGEO AT:` footer. React safely renders paragraphs, bullet lists, bold,
+inline code, and HTTP(S) links; raw HTML cannot execute.
+
+Discord history is cached for 60 seconds. The latest page refreshes every 65 seconds
+while visible. Each page scans 100 Discord messages; Older posts continues through
+history even when a page contains only tournament announcements. Edited and deleted
+release posts are reflected after revalidation. If credentials or history permissions
+are unavailable, the page displays a temporary-unavailability state, without exposing
+Discord errors or credentials. There is no database migration for changelogs.
diff --git a/docs/tournaments.md b/docs/tournaments.md
index f16a8a3..f5ee3ce 100644
--- a/docs/tournaments.md
+++ b/docs/tournaments.md
@@ -2,7 +2,7 @@
 
 Signed-in users with active accounts can create a tournament at `/tournaments` and share its `/tournaments/{id}` page. The organizer chooses a published map with at least five distinct panorama locations, a difficulty, a scheduled start, a player cap from 2 to 32, and 1 to 10 tournament rounds. Every tournament round contains exactly five mini-rounds.
 
-The organizer selects either a shared time budget across the five mini-rounds (the default), or a separate timer for each mini-round. Shared budgets accept 15–3000 seconds; per-mini-round timers accept 15–600 seconds. Both use 15-second increments. The shared clock starts when the first mini-round becomes playable, excludes initial loading, and keeps running through later loading and result screens. When it expires, all unplayed mini-rounds close with zero points. Difficulty settings are saved with the tournament, so later preset changes do not alter a running competition.
+The organizer selects either a shared time budget across the five mini-rounds (the default), or a separate timer for each mini-round. Shared budgets accept 15–3000 seconds; per-mini-round timers accept 15–600 seconds. Both use 15-second increments. Void always uses a separate 10-second timer per mini-round. The shared clock starts when the first mini-round becomes playable, excludes initial loading, and keeps running through later loading and result screens. When it expires, all unplayed mini-rounds close with zero points. Difficulty settings are saved with the tournament, so later preset changes do not alter a running competition.
 
 The schedule form displays the application server's timezone. Its local date/time input is interpreted in that zone, even when the organizer's browser uses another zone. The server validates future starts within 90 days; browser clocks do not decide when gameplay begins. Discord announcements include the server date/time and zone, plus Discord timestamps displayed in each reader's local time.
 
diff --git a/lib/api.ts b/lib/api.ts
index 99e3c54..caaaba2 100644
--- a/lib/api.ts
+++ b/lib/api.ts
@@ -188,14 +188,16 @@ export async function handle(request: NextRequest, path: string[]) {
           await client
             .from("difficulty_presets")
             .select(
-              "id,name,seconds,zoom,pan,compass,coordinates,map_zoom,scoring",
+              "id,name,seconds,zoom,pan,compass,coordinates,map_zoom,map_pan,timer_visible,scoring",
             )
             .order("name", { ascending: true }),
         );
         return NextResponse.json({
-          presets: presets.map(({ map_zoom, ...preset }) => ({
+          presets: presets.map(({ map_zoom, map_pan, timer_visible, ...preset }) => ({
             ...preset,
             mapZoom: map_zoom,
+            mapPan: map_pan,
+            timerVisible: timer_visible,
           })),
         });
       }
@@ -205,17 +207,17 @@ export async function handle(request: NextRequest, path: string[]) {
           request.headers.get("x-forwarded-for")?.split(",")[0]?.trim() ||
           "unknown";
         await limit("difficulty-presets:" + hash(address), 8, 3600);
-        const { mapZoom, ...fields } = body;
+        const { mapZoom, mapPan, timerVisible, ...fields } = body;
         const { data, error } = await client
           .from("difficulty_presets")
-          .insert({ ...fields, map_zoom: mapZoom })
+          .insert({ ...fields, map_zoom: mapZoom, map_pan: mapPan, timer_visible: timerVisible })
           .select(
-            "id,name,seconds,zoom,pan,compass,coordinates,map_zoom,scoring",
+            "id,name,seconds,zoom,pan,compass,coordinates,map_zoom,map_pan,timer_visible,scoring",
           )
           .single();
         checkDifficultyPresetError(error);
         return NextResponse.json({
-          preset: data ? { ...data, mapZoom: data.map_zoom } : null,
+          preset: data ? { ...data, mapZoom: data.map_zoom, mapPan: data.map_pan, timerVisible: data.timer_visible } : null,
         });
       }
     }
@@ -247,7 +249,7 @@ export async function handle(request: NextRequest, path: string[]) {
         const body = z
           .object({
             datasetId: idSchema,
-            difficulty: z.union([z.enum(["easy", "normal", "hard"]), idSchema]),
+            difficulty: z.union([z.enum(["easy", "normal", "hard", "void"]), idSchema]),
           })
           .parse(await jsonBody(request));
         const secret = cookieSecret(request) || randomBytes(32).toString("hex");
diff --git a/lib/changelog-feed.ts b/lib/changelog-feed.ts
new file mode 100644
index 0000000..d09773c
--- /dev/null
+++ b/lib/changelog-feed.ts
@@ -0,0 +1,76 @@
+import {
+  parseReleasePost,
+  RELEASE_NEWS_CHANNEL,
+  RELEASE_WEBHOOK_ID,
+  type ReleasePost,
+} from "../shared/changelog";
+
+export async function readChangelogFeed({
+  token,
+  channel = RELEASE_NEWS_CHANNEL,
+  webhookId = RELEASE_WEBHOOK_ID,
+  before,
+  request = fetch,
+}: {
+  token: string;
+  channel?: string;
+  webhookId?: string;
+  before?: string;
+  request?: typeof fetch;
+}) {
+  if (!/^\d{17,20}$/.test(channel) || (before && !/^\d{17,20}$/.test(before)))
+    throw new Error("Invalid news channel or cursor");
+  const url = new URL(
+    `https://discord.com/api/v10/channels/${channel}/messages`,
+  );
+  url.searchParams.set("limit", "100");
+  if (before) url.searchParams.set("before", before);
+  // Reading history only. No Discord write endpoint is used by this feature.
+  const response = await request(url.toString(), {
+    method: "GET",
+    headers: { Authorization: `Bot ${token}` },
+    next: { revalidate: 60 },
+    signal: AbortSignal.timeout(10_000),
+    redirect: "error",
+  });
+  if (!response.ok)
+    throw new Error(`News feed unavailable (${response.status})`);
+  const posts: ReleasePost[] = await response.json();
+  if (
+    !Array.isArray(posts) ||
+    posts.some(
+      (post) =>
+        typeof post.content !== "string" ||
+        post.channel_id !== channel ||
+        !/^\d{17,20}$/.test(post.id),
+    )
+  )
+    throw new Error("Invalid news response");
+  if (
+    posts.some((post) => post.webhook_id === webhookId) &&
+    posts
+      .filter((post) => post.webhook_id === webhookId)
+      .every((post) => !post.content.trim())
+  )
+    throw new Error(
+      "Release text is unavailable; check Discord Message Content access",
+    );
+  const entries = posts
+    .flatMap((post) => {
+      const entry = parseReleasePost(post, webhookId);
+      return entry ? [entry] : [];
+    })
+    .sort(
+      (a, b) =>
+        b.publishedAt.localeCompare(a.publishedAt) ||
+        (BigInt(a.id) > BigInt(b.id) ? -1 : 1),
+    );
+  const oldest = posts.reduce<string | undefined>(
+    (id, post) => (!id || BigInt(post.id) < BigInt(id) ? post.id : id),
+    undefined,
+  );
+  return {
+    entries,
+    before: posts.length === 100 && oldest !== before ? oldest : undefined,
+  };
+}
diff --git a/lib/changelog.ts b/lib/changelog.ts
new file mode 100644
index 0000000..cca291c
--- /dev/null
+++ b/lib/changelog.ts
@@ -0,0 +1,21 @@
+import "server-only";
+import { readChangelogFeed } from "./changelog-feed";
+
+export async function getChangelog(before?: string) {
+  const token = process.env.DISCORD_BOT_TOKEN?.trim();
+  if (!token) return { entries: [], unavailable: true };
+  try {
+    return {
+      ...(await readChangelogFeed({
+        token,
+        before,
+        channel: process.env.DISCORD_NEWS_CHANNEL_ID?.trim() || undefined,
+        webhookId: process.env.DISCORD_RELEASE_WEBHOOK_ID?.trim() || undefined,
+      })),
+      unavailable: false,
+    };
+  } catch {
+    // Do not expose Discord details or credentials to the public page.
+    return { entries: [], unavailable: true };
+  }
+}
diff --git a/lib/service-error.ts b/lib/service-error.ts
index 83ddc7f..dc0648e 100644
--- a/lib/service-error.ts
+++ b/lib/service-error.ts
@@ -14,7 +14,7 @@ export function checkDifficultyPresetError(
     throw new ServiceError("A difficulty with that name already exists", 409);
   if (error?.code === "23514")
     throw new ServiceError(
-      "Use a name with 2–40 characters and a round time of 15–600 seconds in 15-second steps",
+      "Use a name with 2–40 characters and a round time of 5–600 seconds in 5-second steps",
       400,
     );
   checkServiceError(error);
diff --git a/scripts/test-difficulty-presets-sql.mjs b/scripts/test-difficulty-presets-sql.mjs
index 4e727d9..858804e 100644
--- a/scripts/test-difficulty-presets-sql.mjs
+++ b/scripts/test-difficulty-presets-sql.mjs
@@ -59,7 +59,7 @@ try {
       ),
       (error) => error.code === "23514",
     );
-  for (const seconds of [0, 14, 16, 601])
+  for (const seconds of [0, 4, 14, 16, 601])
     await assert.rejects(
       db.query(
         "insert into public.difficulty_presets(name,seconds,zoom) values('Invalid clock',$1,true)",
@@ -83,6 +83,7 @@ try {
     ["easy", 180],
     ["normal", 90],
     ["hard", 30],
+    ["void", 10],
   ])
     assert.equal(
       (
@@ -111,6 +112,10 @@ try {
       "insert into auth.users values(gen_random_uuid()) returning id",
     )
   ).rows[0].id;
+  await db.query(
+    "insert into public.profiles(id,display_name) values($1,'Difficulty host') on conflict(id) do update set display_name=excluded.display_name",
+    [owner],
+  );
   const map = (
     await db.query(
       `insert into public.datasets(owner_id,name,source,bounds,state,panorama_count)
@@ -137,6 +142,85 @@ try {
     revision,
     map,
   ]);
+  const voidRules = {
+    id: "void",
+    name: "Void",
+    seconds: 10,
+    zoom: false,
+    pan: false,
+    compass: false,
+    coordinates: false,
+    mapZoom: false,
+    mapPan: false,
+    timerVisible: true,
+    scoring: "strict",
+  };
+  const voidSolo = (
+    await db.query("select public.create_game($1,'void',$2,'void-solo') id", [
+      map,
+      owner,
+    ])
+  ).rows[0].id;
+  const voidRoom = (
+    await db.query(
+      "select public.create_map_room($1,'void','Void host',2,$2,$3) id",
+      [map, "d".repeat(64), owner],
+    )
+  ).rows[0].id;
+  for (const [table, id] of [
+    ["game_sessions", voidSolo],
+    ["multiplayer_rooms", voidRoom],
+  ])
+    assert.deepEqual(
+      (
+        await db.query(
+          `select difficulty_settings from public.${table} where id=$1`,
+          [id],
+        )
+      ).rows[0].difficulty_settings,
+      voidRules,
+    );
+  await db.query("select public.activate_round($1,0,'void-solo')", [voidSolo]);
+  const voidClock = (
+    await db.query(
+      "select extract(epoch from (deadline-clock_timestamp()))::float8 seconds from public.game_rounds where session_id=$1 and round_number=0",
+      [voidSolo],
+    )
+  ).rows[0].seconds;
+  assert.ok(voidClock > 9 && voidClock <= 10);
+  await db.query(
+    "select public.multiplayer_action($1,$2,'join','{\"name\":\"Void guest\"}')",
+    [voidRoom, "e".repeat(64)],
+  );
+  await db.query("select public.multiplayer_action($1,$2,'start')", [
+    voidRoom,
+    "d".repeat(64),
+  ]);
+  for (const token of ["d".repeat(64), "e".repeat(64)])
+    await db.query(
+      "select public.multiplayer_action($1,$2,'ready','{\"round\":0}')",
+      [voidRoom, token],
+    );
+  const voidMultiClock = (
+    await db.query(
+      "select extract(epoch from (deadline-clock_timestamp()))::float8 seconds from public.multiplayer_rounds where room_id=$1 and round_number=0",
+      [voidRoom],
+    )
+  ).rows[0].seconds;
+  assert.ok(voidMultiClock > 9 && voidMultiClock <= 10);
+  const fiveSeconds = (
+    await db.query(
+      "insert into public.difficulty_presets(name,seconds,zoom,map_pan,timer_visible) values('Five second blind clock',5,false,false,false) returning id",
+    )
+  ).rows[0].id;
+  const extraRules = (
+    await db.query("select public.resolve_difficulty_preset($1) rules", [
+      fiveSeconds,
+    ])
+  ).rows[0].rules;
+  assert.equal(extraRules.seconds, 5);
+  assert.equal(extraRules.mapPan, false);
+  assert.equal(extraRules.timerVisible, false);
   const solo = (
     await db.query("select public.create_game($1,$2,$3,$4) id", [
       map,
@@ -173,6 +257,8 @@ try {
         compass: true,
         coordinates: true,
         mapZoom: true,
+        mapPan: true,
+        timerVisible: true,
         scoring: "normal",
       },
     );
@@ -201,6 +287,8 @@ try {
     compass: false,
     coordinates: false,
     mapZoom: false,
+    mapPan: true,
+    timerVisible: true,
     scoring: "strict",
   });
   // Existing sessions retain the original curve even after the library changes.
diff --git a/scripts/test-tournaments-sql.mjs b/scripts/test-tournaments-sql.mjs
index 46102c9..fcd60d1 100644
--- a/scripts/test-tournaments-sql.mjs
+++ b/scripts/test-tournaments-sql.mjs
@@ -68,6 +68,31 @@ try {
         JSON.stringify({ ...base, ...payload }),
       ])
     )[0].id;
+  const voidEvent = await create({
+    difficulty: "void",
+    roundTimeSeconds: 10,
+    timerMode: "perMini",
+  });
+  const voidRules = (
+    await q(
+      "select difficulty_settings,round_time_seconds,timer_mode from public.tournaments where id=$1",
+      [voidEvent],
+    )
+  )[0];
+  assert.equal(voidRules.difficulty_settings.seconds, 10);
+  assert.equal(voidRules.difficulty_settings.mapPan, false);
+  assert.equal(voidRules.difficulty_settings.scoring, "strict");
+  assert.equal(voidRules.round_time_seconds, 10);
+  assert.equal(voidRules.timer_mode, "perMini");
+  for (const settings of [
+    { roundTimeSeconds: 90, timerMode: "perMini" },
+    { roundTimeSeconds: 10, timerMode: "shared" },
+  ])
+    await assert.rejects(
+      create({ difficulty: "void", ...settings }),
+      /Void requires a separate 10-second timer/,
+    );
+  await q("delete from public.tournaments where id=$1", [voidEvent]);
   const act = async (id, user, action = "view", payload = {}) =>
     (
       await q("select public.tournament_action($1,$2,$3,$4) value", [
diff --git a/shared/changelog.ts b/shared/changelog.ts
new file mode 100644
index 0000000..6ad9656
--- /dev/null
+++ b/shared/changelog.ts
@@ -0,0 +1,51 @@
+export const RELEASE_NEWS_CHANNEL = "1558048830770122772";
+// A webhook ID is public; its secret URL/token must never be stored here.
+export const RELEASE_WEBHOOK_ID = "1561021045211660401";
+
+export type ReleasePost = {
+  id: string;
+  channel_id: string;
+  webhook_id?: string;
+  content: string;
+  timestamp: string;
+};
+export type ChangelogEntry = {
+  id: string;
+  title: string;
+  version: string;
+  kind: "Alpha" | "Beta" | "Production" | "Bug fix";
+  body: string;
+  publishedAt: string;
+};
+
+export function parseReleasePost(
+  post: ReleasePost,
+  webhookId = RELEASE_WEBHOOK_ID,
+): ChangelogEntry | null {
+  if (post.webhook_id !== webhookId || !/^\d{17,20}$/.test(post.id))
+    return null;
+  const clean = post.content
+    .replace(/<@&\d+>/g, "")
+    .replace(/(?:^|\n)\s*PLAY THE MINEGEO AT\s*:[\s\S]*$/i, "")
+    .replace(/^[\s,.]+/, "")
+    .trim();
+  const header =
+    /^#{1,3}[ \t]+MineGeo[ \t]+(\d+\.\d+\.\d+(?:\.\d+)?)[ \t]+(Alpha|Beta|Production|Bug[ -]fix)([ \t]+[—–:-][^\r\n]*)?[ \t]*\r?\n/i.exec(
+      clean,
+    );
+  if (!header || !Number.isFinite(Date.parse(post.timestamp))) return null;
+  const body = clean.slice(header[0].length).trim();
+  if (!body) return null;
+  const kind = /^bug/i.test(header[2])
+    ? "Bug fix"
+    : ((header[2][0].toUpperCase() +
+        header[2].slice(1).toLowerCase()) as ChangelogEntry["kind"]);
+  return {
+    id: post.id,
+    title: `MineGeo ${header[1]} ${kind}${header[3]?.trimEnd() ?? ""}`,
+    version: header[1],
+    kind,
+    body,
+    publishedAt: post.timestamp,
+  };
+}
diff --git a/shared/database.ts b/shared/database.ts
index 3f1132e..f262262 100644
--- a/shared/database.ts
+++ b/shared/database.ts
@@ -238,6 +238,8 @@ export type Database = {
           compass: boolean;
           coordinates: boolean;
           map_zoom: boolean;
+          map_pan: boolean;
+          timer_visible: boolean;
           scoring: "normal" | "strict" | "gentle";
           created_at: string;
           id: string;
@@ -250,6 +252,8 @@ export type Database = {
           compass?: boolean;
           coordinates?: boolean;
           map_zoom?: boolean;
+          map_pan?: boolean;
+          timer_visible?: boolean;
           scoring?: "normal" | "strict" | "gentle";
           created_at?: string;
           id?: string;
@@ -262,6 +266,8 @@ export type Database = {
           compass?: boolean;
           coordinates?: boolean;
           map_zoom?: boolean;
+          map_pan?: boolean;
+          timer_visible?: boolean;
           scoring?: "normal" | "strict" | "gentle";
           name?: string;
           seconds?: number;
diff --git a/shared/developer-openapi.ts b/shared/developer-openapi.ts
index 4d9a7e9..e087b0b 100644
--- a/shared/developer-openapi.ts
+++ b/shared/developer-openapi.ts
@@ -190,7 +190,10 @@ export const developerOpenApi = {
         type: "object",
         properties: {
           id,
-          difficulty: { type: "string", enum: ["easy", "normal", "hard"] },
+          difficulty: {
+            type: "string",
+            enum: ["easy", "normal", "hard", "void"],
+          },
           createdAt: date,
           currentRound: { type: "integer", minimum: 0, maximum: 5 },
           complete: { type: "boolean" },
diff --git a/shared/leaderboard.ts b/shared/leaderboard.ts
index a046cf9..8d63270 100644
--- a/shared/leaderboard.ts
+++ b/shared/leaderboard.ts
@@ -3,6 +3,7 @@ export const leaderboardDifficulties = [
   "easy",
   "normal",
   "hard",
+  "void",
 ] as const;
 export type LeaderboardDifficulty = (typeof leaderboardDifficulties)[number];
 export type LeaderboardEntry =
diff --git a/shared/locales/ru.json b/shared/locales/ru.json
index a5e58cf..84bfcee 100644
--- a/shared/locales/ru.json
+++ b/shared/locales/ru.json
@@ -1046,5 +1046,24 @@
   "Minecraft map. Click to place a guess, or use arrow keys to pan and Enter to pin the center.": "Карта Minecraft. Нажмите для метки или перемещайтесь стрелками и нажмите Enter для метки в центре.",
   "Strict scoring penalizes distance more; gentle scoring gives more credit for nearby guesses. Every game still has five rounds.": "Строгий подсчёт сильнее штрафует за расстояние, мягкий даёт больше очков за близкие метки. В игре по-прежнему пять раундов.",
   "Guess selected": "Метка выбрана",
-  "Map": "Карта"
+  "Map": "Карта",
+  "Void": "Пустота",
+  "Hardest · No compass · Fixed map": "Самая сложная · Без компаса · Фиксированная карта",
+  "Allow guess-map panning": "Разрешить перемещение карты",
+  "Show round countdown": "Показывать обратный отсчёт",
+  "Minecraft map. Click to place a guess, or press Enter to pin the center.": "Карта Minecraft. Нажмите для метки или нажмите Enter, чтобы поставить метку в центре.",
+  "Easy gives you 180 seconds, Normal 90, and Hard 30. Void is the hardest: just 10 seconds, a fixed panorama and map, no zoom, no compass or coordinates, and strict scoring. A timed-out round scores zero; you can still finish the expedition.": "Лёгкая сложность даёт 180 секунд, обычная — 90, высокая — 30. Пустота — самая сложная: 10 секунд, фиксированные панорама и карта, без масштабирования, компаса и координат, со строгим подсчётом очков. За истёкший раунд начисляется ноль очков; экспедицию можно продолжить.",
+  "Meet MineGeo’s top explorers. Compare the best five-round scores across Easy, Normal, Hard, and Void Minecraft expeditions.": "Лучшие исследователи MineGeo. Сравнивайте результаты пяти раундов на лёгкой, обычной, высокой сложности и в Пустоте.",
+  "Changelogs": "История обновлений",
+  "WHAT'S NEW": "ЧТО НОВОГО",
+  "New releases, improvements, and fixes from MineGeo.": "Новые версии, улучшения и исправления MineGeo.",
+  "Latest releases": "Последние обновления",
+  "Release notes are temporarily unavailable": "История обновлений временно недоступна",
+  "Please check back soon.": "Пожалуйста, загляните позже.",
+  "No releases on this page yet.": "На этой странице пока нет обновлений.",
+  "Older posts": "Более ранние записи",
+  "Alpha": "Альфа",
+  "Beta": "Бета",
+  "Production": "Релиз",
+  "Bug fix": "Исправления ошибок"
 }
diff --git a/shared/multiplayer.ts b/shared/multiplayer.ts
index af96199..8fb4405 100644
--- a/shared/multiplayer.ts
+++ b/shared/multiplayer.ts
@@ -6,7 +6,7 @@ export const createRoomSchema = z
   .object({
     datasetId: z.string().uuid(),
     difficulty: z.union([
-      z.enum(["easy", "normal", "hard"]),
+      z.enum(["easy", "normal", "hard", "void"]),
       z.string().uuid(),
     ]),
     playerLimit: z.number().int().min(2).max(16),
diff --git a/shared/prometheus.ts b/shared/prometheus.ts
index 5dbaa46..8becbe8 100644
--- a/shared/prometheus.ts
+++ b/shared/prometheus.ts
@@ -65,7 +65,7 @@ export const metricDefinitions = {
   minegeo_games: {
     help: "Retained solo games by difficulty and completion state.",
     labels: {
-      difficulty: ["easy", "normal", "hard"],
+      difficulty: ["easy", "normal", "hard", "void"],
       status: ["incomplete", "complete"],
     },
   },
diff --git a/shared/protocol.ts b/shared/protocol.ts
index 1651d18..369dc28 100644
--- a/shared/protocol.ts
+++ b/shared/protocol.ts
@@ -183,6 +183,18 @@ export const difficulties = {
   easy: { seconds: 180, zoom: true, label: "Easy" },
   normal: { seconds: 90, zoom: true, label: "Normal" },
   hard: { seconds: 30, zoom: false, label: "Hard" },
+  void: {
+    seconds: 10,
+    zoom: false,
+    label: "Void",
+    pan: false,
+    compass: false,
+    coordinates: false,
+    mapZoom: false,
+    mapPan: false,
+    timerVisible: true,
+    scoring: "strict",
+  },
 } as const;
 export type Difficulty = keyof typeof difficulties;
 export const difficultyRuleDefaults = {
@@ -190,6 +202,8 @@ export const difficultyRuleDefaults = {
   compass: true,
   coordinates: true,
   mapZoom: true,
+  mapPan: true,
+  timerVisible: true,
   scoring: "normal" as const,
 };
 export type ScoringMode = "normal" | "strict" | "gentle";
@@ -203,6 +217,8 @@ export type DifficultyPreset = {
   compass?: boolean;
   coordinates?: boolean;
   mapZoom?: boolean;
+  mapPan?: boolean;
+  timerVisible?: boolean;
   scoring?: ScoringMode;
 };
 export const customDifficultySchema = z
@@ -222,14 +238,16 @@ export const customDifficultySchema = z
     seconds: z
       .number()
       .int()
-      .min(15)
+      .min(5)
       .max(600)
-      .refine((seconds) => seconds % 15 === 0),
+      .refine((seconds) => seconds % 5 === 0),
     zoom: z.boolean(),
     pan: z.boolean().default(true),
     compass: z.boolean().default(true),
     coordinates: z.boolean().default(true),
     mapZoom: z.boolean().default(true),
+    mapPan: z.boolean().default(true),
+    timerVisible: z.boolean().default(true),
     scoring: z.enum(["normal", "strict", "gentle"]).default("normal"),
   })
   .strict();
diff --git a/shared/tournaments.ts b/shared/tournaments.ts
index 9945e79..f86a37d 100644
--- a/shared/tournaments.ts
+++ b/shared/tournaments.ts
@@ -16,17 +16,24 @@ export const tournamentSettings = z
     name: safeName,
     datasetId: z.string().uuid(),
     difficulty: z.union([
-      z.enum(["easy", "normal", "hard"]),
+      z.enum(["easy", "normal", "hard", "void"]),
       z.string().uuid(),
     ]),
     playerLimit: z.number().int().min(2).max(32),
     roundCount: z.number().int().min(1).max(10),
-    roundTimeSeconds: z.number().int().min(15).max(3000).multipleOf(15),
+    roundTimeSeconds: z.number().int().min(10).max(3000),
     timerMode: z.enum(["shared", "perMini"]).default("shared"),
     startsAt: z.string().datetime({ offset: true }),
     announceDiscord: z.boolean(),
   })
   .strict()
+  .refine(
+    (value) =>
+      value.difficulty === "void"
+        ? value.timerMode === "perMini" && value.roundTimeSeconds === 10
+        : value.roundTimeSeconds >= 15 && value.roundTimeSeconds % 15 === 0,
+    "Void requires a separate 10-second timer; other tournament timers use 15-second steps",
+  )
   .refine(
     (value) => value.timerMode !== "perMini" || value.roundTimeSeconds <= 600,
     "Mini-round timers allow at most 600 seconds",
diff --git a/supabase/migrations/20261020083343_void_difficulty_rules.sql b/supabase/migrations/20261020083343_void_difficulty_rules.sql
new file mode 100644
index 0000000..63cef5d
--- /dev/null
+++ b/supabase/migrations/20261020083343_void_difficulty_rules.sql
@@ -0,0 +1,135 @@
+-- Keep old snapshots unchanged; missing new switches retain their client defaults.
+alter table public.difficulty_presets
+  add column map_pan boolean not null default true,
+  add column timer_visible boolean not null default true;
+alter table public.difficulty_presets drop constraint difficulty_presets_seconds_check;
+alter table public.difficulty_presets add constraint difficulty_presets_seconds_check
+  check (seconds between 5 and 600 and seconds % 5 = 0);
+
+alter table public.game_sessions drop constraint game_sessions_difficulty_check;
+alter table public.game_sessions add constraint game_sessions_difficulty_check check (
+  difficulty in ('easy','normal','hard','void')
+  or difficulty ~ '^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$'
+);
+alter table public.multiplayer_rooms drop constraint multiplayer_rooms_difficulty_check;
+alter table public.multiplayer_rooms add constraint multiplayer_rooms_difficulty_check check (
+  difficulty in ('easy','normal','hard','void')
+  or difficulty ~ '^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$'
+);
+
+create or replace function public.resolve_difficulty_preset(p_id text)
+returns jsonb language plpgsql stable security invoker set search_path = '' as $$
+declare preset jsonb;
+begin
+  if p_id = 'void' then
+    return '{"id":"void","name":"Void","seconds":10,"zoom":false,"pan":false,"compass":false,"coordinates":false,"mapZoom":false,"mapPan":false,"timerVisible":true,"scoring":"strict"}'::jsonb;
+  end if;
+  if p_id in ('easy','normal','hard') then
+    return jsonb_build_object('id',p_id,'name',initcap(p_id),
+      'seconds',case p_id when 'easy' then 180 when 'hard' then 30 else 90 end,
+      'zoom',p_id <> 'hard','pan',true,'compass',true,'coordinates',true,
+      'mapZoom',true,'mapPan',true,'timerVisible',true,'scoring','normal');
+  end if;
+  select jsonb_build_object('id',p.id::text,'name',p.name,'seconds',p.seconds,'zoom',p.zoom,
+    'pan',p.pan,'compass',p.compass,'coordinates',p.coordinates,'mapZoom',p.map_zoom,
+    'mapPan',p.map_pan,'timerVisible',p.timer_visible,'scoring',p.scoring)
+  into preset from public.difficulty_presets p where p.id::text=lower(p_id);
+  if not found then raise exception 'Choose a saved difficulty'; end if;
+  return preset;
+end; $$;
+
+-- A Void tournament must keep the same ten-second limit for every mini-round.
+alter table public.tournaments drop constraint tournaments_round_time_seconds_check;
+alter table public.tournaments add constraint tournaments_round_time_seconds_check check (
+  (difficulty='void' and timer_mode='perMini' and round_time_seconds=10)
+  or (difficulty<>'void' and round_time_seconds between 15 and 3000 and round_time_seconds%15=0)
+);
+
+create or replace function public.create_tournament(p_owner uuid,p_payload jsonb) returns uuid
+language plpgsql security invoker set search_path='' as $$
+declare tid uuid; rev public.revisions; settings jsonb; start_time timestamptz; zone text;
+ seconds integer; cap integer; rounds integer; title text; mode text;
+begin
+ if not exists(select 1 from public.profiles where id=p_owner and account_status='active') then raise exception 'Active account required'; end if;
+ select r.* into rev from public.datasets d join public.revisions r on r.id=d.revision_id
+  where d.id=(p_payload->>'datasetId')::uuid and d.state='published';
+ if not found then raise exception 'Choose a published map'; end if;
+ if jsonb_array_length(public.game_viewpoint_pool(rev.manifest,rev.asset_root))<5 then raise exception 'Map needs at least five distinct panorama locations'; end if;
+ start_time:=(p_payload->>'startsAt')::timestamptz;
+ if start_time is null or start_time<=clock_timestamp() or start_time>clock_timestamp()+interval '90 days' then raise exception 'Choose a future start within 90 days'; end if;
+ zone:=p_payload->>'serverTimezone';
+ if zone is null or not exists(select 1 from pg_catalog.pg_timezone_names where name=zone) then raise exception 'Invalid server timezone'; end if;
+ title:=btrim(p_payload->>'name'); cap:=(p_payload->>'playerLimit')::integer;
+ rounds:=(p_payload->>'roundCount')::integer; seconds:=(p_payload->>'roundTimeSeconds')::integer;
+ if cap is null or cap not between 2 and 32 then raise exception 'Choose between 2 and 32 players'; end if;
+ if rounds is null or rounds not between 1 and 10 then raise exception 'Choose between 1 and 10 tournament rounds'; end if;
+ mode:=coalesce(p_payload->>'timerMode','shared');
+ if mode not in('shared','perMini') then raise exception 'Invalid tournament timer mode'; end if;
+ if p_payload->>'difficulty'='void' then
+  if mode<>'perMini' or seconds is distinct from 10 then raise exception 'Void requires a separate 10-second timer'; end if;
+ elsif seconds is null or seconds not between 15 and (case when mode='shared' then 3000 else 600 end) or seconds%15<>0 then raise exception 'Choose a valid tournament time in steps of 15 seconds'; end if;
+ settings:=public.resolve_difficulty_preset(p_payload->>'difficulty')||jsonb_build_object('seconds',least(seconds,600),'roundCount',5);
+ insert into public.tournaments(name,owner_id,revision_id,starts_at,server_timezone,player_limit,round_count,round_time_seconds,timer_mode,difficulty,difficulty_settings,announce_discord)
+ values(title,p_owner,rev.id,start_time,zone,cap,rounds,seconds,mode,p_payload->>'difficulty',settings,coalesce((p_payload->>'announceDiscord')::boolean,false)) returning id into tid;
+ insert into public.tournament_members(tournament_id,account_id) values(tid,p_owner);
+ return tid;
+end; $$;
+
+create or replace function public.read_prometheus_metrics(p_token_hash text) returns jsonb
+language plpgsql security invoker set search_path = '' set statement_timeout = '15s' as $$
+declare settings public.prometheus_settings; collected_at timestamptz := clock_timestamp(); result jsonb;
+begin
+  -- The token grants only access to aggregate metrics. Demoting/deleting its
+  -- issuing Admin also invalidates it. Lock prevents concurrent scrape stampedes.
+  select s.* into settings from public.prometheus_settings s
+    where s.id and s.token_hash=p_token_hash
+      and exists(select 1 from public.profiles p where p.id=s.updated_by and p.role='admin')
+    for update;
+  if not found then return null; end if;
+  if settings.snapshot_at > collected_at - interval '30 seconds' then
+    update public.prometheus_settings set last_scraped_at=collected_at where id;
+    return settings.snapshot;
+  end if;
+  with samples(metric, labels, value) as (
+    select 'minegeo_accounts', '{}'::jsonb, count(*)::double precision from public.profiles
+    union all select 'minegeo_published_panoramas', '{}'::jsonb, coalesce(sum(panorama_count),0)::double precision from public.datasets where state='published'
+    union all select 'minegeo_games_started_24h', '{}'::jsonb, count(*)::double precision from public.game_sessions where created_at >= collected_at - interval '24 hours'
+    union all select 'minegeo_rooms_created_24h', '{}'::jsonb, count(*)::double precision from public.multiplayer_rooms where created_at >= collected_at - interval '24 hours'
+    union all select 'minegeo_snapshot_timestamp_seconds', '{}'::jsonb, extract(epoch from collected_at)::double precision
+    union all
+    select 'minegeo_maps', jsonb_build_object('state',v.state), coalesce(c.n,0)::double precision
+      from (values('uploading'),('processing'),('draft'),('review'),('published'),('rejected'),('unpublished'),('failed')) v(state)
+      left join (select state,count(*) n from public.datasets group by state) c using(state)
+    union all
+    select 'minegeo_games', jsonb_build_object('difficulty',d.difficulty,'status',v.status), coalesce(c.n,0)::double precision
+      from (values('easy'),('normal'),('hard'),('void')) d(difficulty)
+      cross join (values('incomplete'),('complete')) v(status)
+      left join (select difficulty,case when current_round=5 then 'complete' else 'incomplete' end status,count(*) n
+        from public.game_sessions group by 1,2) c using(difficulty,status)
+    union all
+    select 'minegeo_rooms', jsonb_build_object('state',v.state), coalesce(c.n,0)::double precision
+      from (values('lobby'),('loading'),('playing'),('results'),('finished'),('closed')) v(state)
+      left join (select status state,count(*) n from public.multiplayer_rooms group by status) c using(state)
+    union all
+    select 'minegeo_upload_jobs', jsonb_build_object('state',v.state), coalesce(c.n,0)::double precision
+      from (values('queued'),('running'),('complete'),('failed'),('cancelled')) v(state)
+      left join (select state,count(*) n from public.upload_jobs group by state) c using(state)
+    union all
+    select 'minegeo_bug_reports', jsonb_build_object('state',v.state), coalesce(c.n,0)::double precision
+      from (values('draft'),('pending'),('open'),('done')) v(state)
+      left join (select state,count(*) n from public.bug_reports group by state) c using(state)
+    union all
+    select 'minegeo_content_reports', jsonb_build_object('state',v.state), coalesce(c.n,0)::double precision
+      from (values('open'),('resolved'),('confirmed'),('dismissed')) v(state)
+      left join (select state,count(*) n from public.reports group by state) c using(state)
+    union all
+    select 'minegeo_discord_announcements', jsonb_build_object('state',v.state), coalesce(c.n,0)::double precision
+      from (values('pending'),('sending'),('sent'),('skipped'),('failed')) v(state)
+      left join (select state,count(*) n from public.discord_announcements group by state) c using(state)
+  ) select jsonb_agg(jsonb_build_object('metric',metric,'labels',labels,'value',value) order by metric,labels::text) into result from samples;
+  update public.prometheus_settings set last_scraped_at=collected_at, snapshot_at=collected_at, snapshot=result where id;
+  return result;
+end; $$;
+
+-- Discard the cached metrics shape when adding the Void dimension.
+update public.prometheus_settings set snapshot=null,snapshot_at=null;
diff --git a/tests/changelog.test.ts b/tests/changelog.test.ts
new file mode 100644
index 0000000..c68285b
--- /dev/null
+++ b/tests/changelog.test.ts
@@ -0,0 +1,136 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+import { renderToStaticMarkup } from "react-dom/server";
+import { createElement } from "react";
+import {
+  parseReleasePost,
+  RELEASE_NEWS_CHANNEL,
+  RELEASE_WEBHOOK_ID,
+} from "../shared/changelog";
+import { readChangelogFeed } from "../lib/changelog-feed";
+import { ReleaseNotes } from "../components/ReleaseNotes";
+
+const post = (content: string) => ({
+  id: "1561021045211660402",
+  channel_id: RELEASE_NEWS_CHANNEL,
+  webhook_id: RELEASE_WEBHOOK_ID,
+  timestamp: "2026-10-20T08:00:00Z",
+  content,
+});
+
+test("release posts remove roles, punctuation and each published footer format", () => {
+  for (const kind of ["Alpha", "Beta", "Production", "Bug fix"]) {
+    for (const footer of [
+      "<https://minegeo.site>",
+      "<https://minegeo.site/>",
+      '[https://minegeo.site/](https://minegeo.site/ "https://minegeo.site/")',
+    ]) {
+      const entry = parseReleasePost(
+        post(
+          `<@&1558052962817933322>, <@&1558053208008433705>.\n## MineGeo 1.0.4.1 ${kind}\n\nA new release. 😄\n\n- **Fixed:** Shared timers.\n\nPLAY THE MINEGEO AT: ${footer}`,
+        ),
+      );
+      assert.equal(entry?.kind, kind);
+      assert.equal(
+        entry?.body,
+        "A new release. 😄\n\n- **Fixed:** Shared timers.",
+      );
+      assert.equal(entry?.version, "1.0.4.1");
+    }
+  }
+});
+
+test("only the release webhook's complete release posts appear", () => {
+  const valid = post("## MineGeo 1.0.4 Beta\nHello");
+  assert.equal(
+    parseReleasePost({ ...valid, webhook_id: "111111111111111111" }),
+    null,
+  );
+  assert.equal(parseReleasePost({ ...valid, webhook_id: undefined }), null);
+  assert.equal(parseReleasePost({ ...valid, timestamp: "invalid" }), null);
+  assert.equal(
+    parseReleasePost(post("## Community tournament\nStarts soon")),
+    null,
+  );
+  assert.equal(parseReleasePost(post("## MineGeo 1.0.4 Beta\n")), null);
+});
+
+test("release headings can include a descriptive subtitle", () => {
+  const entry = parseReleasePost(
+    post(
+      "## MineGeo 1.0.5 Beta — Changelog Update\n\nA new release.\n\nPLAY THE MINEGEO AT: <https://minegeo.site/>",
+    ),
+  );
+  assert.equal(entry?.title, "MineGeo 1.0.5 Beta — Changelog Update");
+  assert.equal(entry?.body, "A new release.");
+});
+
+test("feed uses only GET, preserves older pagination through non-release posts", async () => {
+  let calls = 0;
+  const request: typeof fetch = async (url, options) => {
+    calls++;
+    assert.equal(options?.method, "GET");
+    assert.equal(
+      new URL(String(url)).searchParams.get("before"),
+      "1661021045211660402",
+    );
+    assert.equal(
+      new Headers(options?.headers).get("Authorization"),
+      "Bot test-token",
+    );
+    const posts = Array.from({ length: 100 }, (_, i) => ({
+      ...post("Tournament news"),
+      id: String(1561021045211660500n - BigInt(i)),
+    }));
+    posts[0].content = "## MineGeo 1.0.4 Beta\n- **New:** Void";
+    return Response.json(posts);
+  };
+  const feed = await readChangelogFeed({
+    token: "test-token",
+    request,
+    before: "1661021045211660402",
+  });
+  assert.equal(calls, 1);
+  assert.equal(feed.entries.length, 1);
+  assert.equal(feed.before, "1561021045211660401");
+});
+
+test("feed fails cleanly on denied access, rate limits and wrong channel data", async () => {
+  for (const status of [401, 403, 429, 500]) {
+    await assert.rejects(
+      readChangelogFeed({
+        token: "test",
+        request: async () => new Response("", { status }),
+      }),
+    );
+  }
+  await assert.rejects(
+    readChangelogFeed({
+      token: "test",
+      request: async () =>
+        Response.json([{ ...post("test"), channel_id: "other" }]),
+    }),
+  );
+});
+
+test("redacted webhook messages are unavailable rather than an empty release history", async () => {
+  await assert.rejects(
+    readChangelogFeed({
+      token: "test",
+      request: async () => Response.json([post("")]),
+    }),
+    /Message Content/,
+  );
+});
+
+test("release Markdown renders emphasis and safe links, escaping executable HTML", () => {
+  const html = renderToStaticMarkup(
+    createElement(ReleaseNotes, {
+      body: "- **New:** Void\n- <script>alert(1)</script>\n\n[Guide](https://minegeo.site/docs) [bad](javascript:alert)",
+    }),
+  );
+  assert.match(html, /<strong>New:<\/strong>/);
+  assert.match(html, /&lt;script&gt;/);
+  assert.match(html, /href="https:\/\/minegeo.site\/docs"/);
+  assert.doesNotMatch(html, /href="javascript:/);
+});
diff --git a/tests/difficulty-presets.test.ts b/tests/difficulty-presets.test.ts
index 335f070..fefea4b 100644
--- a/tests/difficulty-presets.test.ts
+++ b/tests/difficulty-presets.test.ts
@@ -1,6 +1,12 @@
 import assert from "node:assert/strict";
 import { test } from "node:test";
-import { customDifficultySchema, scoreGuess } from "../shared/protocol";
+import {
+  customDifficultySchema,
+  difficulties,
+  scoreGuess,
+} from "../shared/protocol";
+import { createRoomSchema } from "../shared/multiplayer";
+import { tournamentSettings } from "../shared/tournaments";
 import { mergeDifficultyPresets } from "../shared/difficulty-presets";
 
 const rules = { seconds: 90, zoom: true };
@@ -12,6 +18,8 @@ test("expanded difficulty rules preserve defaults and validate controls", () =>
       compass: preset.compass,
       coordinates: preset.coordinates,
       mapZoom: preset.mapZoom,
+      mapPan: preset.mapPan,
+      timerVisible: preset.timerVisible,
       scoring: preset.scoring,
     },
     {
@@ -19,10 +27,19 @@ test("expanded difficulty rules preserve defaults and validate controls", () =>
       compass: true,
       coordinates: true,
       mapZoom: true,
+      mapPan: true,
+      timerVisible: true,
       scoring: "normal",
     },
   );
-  for (const key of ["pan", "compass", "coordinates", "mapZoom"])
+  for (const key of [
+    "pan",
+    "compass",
+    "coordinates",
+    "mapZoom",
+    "mapPan",
+    "timerVisible",
+  ])
     assert.equal(
       customDifficultySchema.safeParse({
         name: "Fixture",
@@ -96,13 +113,13 @@ test("difficulty names accept normal text and count Unicode characters consisten
 });
 
 test("difficulty rules enforce their supported range and strict request shape", () => {
-  for (const seconds of [15, 90, 600])
+  for (const seconds of [5, 10, 15, 20, 90, 600])
     assert.equal(
       customDifficultySchema.safeParse({ name: "Fixture", ...rules, seconds })
         .success,
       true,
     );
-  for (const seconds of [0, 14, 16, 601, 15.5, NaN, Infinity, "90"])
+  for (const seconds of [0, 4, 14, 16, 601, 15.5, NaN, Infinity, "90"])
     assert.equal(
       customDifficultySchema.safeParse({ name: "Fixture", ...rules, seconds })
         .success,
@@ -118,6 +135,59 @@ test("difficulty rules enforce their supported range and strict request shape",
   );
 });
 
+test("Void is the shortest built-in challenge and disables navigation aids", () => {
+  assert.ok(
+    Object.entries(difficulties).every(
+      ([id, rule]) => id === "void" || difficulties.void.seconds < rule.seconds,
+    ),
+  );
+  for (const rule of [
+    "zoom",
+    "pan",
+    "compass",
+    "coordinates",
+    "mapZoom",
+    "mapPan",
+  ] as const)
+    assert.equal(difficulties.void[rule], false);
+  assert.equal(difficulties.void.scoring, "strict");
+  assert.equal(
+    createRoomSchema.safeParse({
+      datasetId: "11111111-1111-4111-8111-111111111111",
+      difficulty: "void",
+      playerLimit: 4,
+    }).success,
+    true,
+  );
+});
+
+test("Void tournaments preserve ten seconds per mini-round", () => {
+  const settings = {
+    name: "Void event",
+    datasetId: "11111111-1111-4111-8111-111111111111",
+    difficulty: "void",
+    playerLimit: 4,
+    roundCount: 3,
+    roundTimeSeconds: 10,
+    timerMode: "perMini",
+    startsAt: "2026-10-25T12:00:00Z",
+    announceDiscord: false,
+  };
+  assert.equal(tournamentSettings.safeParse(settings).success, true);
+  assert.equal(
+    tournamentSettings.safeParse({ ...settings, roundTimeSeconds: 90 }).success,
+    false,
+  );
+  assert.equal(
+    tournamentSettings.safeParse({ ...settings, timerMode: "shared" }).success,
+    false,
+  );
+  assert.equal(
+    tournamentSettings.safeParse({ ...settings, difficulty: "normal" }).success,
+    false,
+  );
+});
+
 test("a delayed preset listing cannot erase a newly saved preset or duplicate it", async () => {
   const old = { id: "old", name: "Old", ...rules };
   const saved = { id: "saved", name: "New", ...rules };
diff --git a/tests/prometheus.test.ts b/tests/prometheus.test.ts
index 8ccdd1b..8d4a215 100644
--- a/tests/prometheus.test.ts
+++ b/tests/prometheus.test.ts
@@ -27,10 +27,10 @@ const samples = Object.entries(metricDefinitions).flatMap(
 
 test("metrics exposition is bounded, complete and contains only fixed aggregate dimensions", () => {
   const text = formatMetrics(samples);
-  assert.equal(samples.length, 43);
+  assert.equal(samples.length, 45);
   assert.equal(
     text.split("\n").filter((line) => line && !line.startsWith("#")).length,
-    43,
+    45,
   );
   assert.ok(text.endsWith("\n"));
   assert.match(text, /# TYPE minegeo_games gauge/);