diff --git a/src/components/boards/BoardGame.tsx b/src/components/boards/BoardGame.tsx
index b178a70..df39c29 100644
--- a/src/components/boards/BoardGame.tsx
+++ b/src/components/boards/BoardGame.tsx
@@ -804,7 +804,7 @@ function BoardGame() {
                 />
               }
             />
-            <MoveControls />
+            <MoveControls readOnly={gameState === "playing"} />
           </Stack>
         )}
       </Portal>
diff --git a/src/components/common/CompleteMoveCell.tsx b/src/components/common/CompleteMoveCell.tsx
index 395d90c..9f761b1 100644
--- a/src/components/common/CompleteMoveCell.tsx
+++ b/src/components/common/CompleteMoveCell.tsx
@@ -15,7 +15,7 @@ import { useTranslation } from "react-i18next";
 import { useStore } from "zustand";
 import { useStoreWithEqualityFn } from "zustand/traditional";
 import Comment from "@/components/common/Comment";
-import { currentTabAtom } from "@/state/atoms";
+import { currentGameInProgressAtom, currentTabAtom } from "@/state/atoms";
 import type { Annotation } from "@/utils/annotation";
 import { hasMorePriority, stripClock } from "@/utils/chess";
 import { getTabFile } from "@/utils/tabs";
@@ -106,6 +106,7 @@ function CompleteMoveCell({
   const [open, setOpen] = useState(false);
   const currentTab = useAtomValue(currentTabAtom);
   const tabFile = getTabFile(currentTab);
+  const gameInProgress = useAtomValue(currentGameInProgressAtom);
 
   const { t } = useTranslation();
 
@@ -181,6 +182,7 @@ function CompleteMoveCell({
                 <Menu.Item
                   color="red"
                   leftSection={<IconX size="0.875rem" />}
+                  disabled={gameInProgress}
                   onClick={() => deleteMove(movePath)}
                 >
                   {t("Menu.DeleteMove")}
diff --git a/src/state/atoms.ts b/src/state/atoms.ts
index 3e63d84..129e12c 100644
--- a/src/state/atoms.ts
+++ b/src/state/atoms.ts
@@ -449,6 +449,11 @@ type GameState = "settingUp" | "playing" | "gameOver";
 const gameStateFamily = atomFamily((_tab: string) => atom<GameState>("settingUp"));
 export const currentGameStateAtom = tabValue(gameStateFamily);
 
+export const currentGameInProgressAtom = atom((get) => {
+    const tab = get(currentTabAtom);
+    return tab?.type === "play" && get(gameStateFamily(tab.value)) === "playing";
+});
+
 const playersFamily = atomFamily((_tab: string) =>
     atom<{
         white: OpponentSettings;
diff --git a/src/utils/tests/atoms.test.ts b/src/utils/tests/atoms.test.ts
new file mode 100644
index 0000000..6a9aa90
--- /dev/null
+++ b/src/utils/tests/atoms.test.ts
@@ -0,0 +1,40 @@
+import { createStore } from "jotai";
+import { expect, test } from "vitest";
+import {
+    activeTabAtom,
+    currentGameInProgressAtom,
+    currentGameStateAtom,
+    tabsAtom,
+} from "@/state/atoms";
+import type { Tab } from "@/utils/tabs";
+
+function storeWithTab(type: Tab["type"]) {
+    const store = createStore();
+    store.set(tabsAtom, [{ name: "Tab", value: "tab", type, gameOrigin: { kind: "none" } }]);
+    store.set(activeTabAtom, "tab");
+    return store;
+}
+
+test("a play tab is in progress only while the game is playing", () => {
+    const store = storeWithTab("play");
+    expect(store.get(currentGameInProgressAtom)).toBe(false);
+
+    store.set(currentGameStateAtom, "playing");
+    expect(store.get(currentGameInProgressAtom)).toBe(true);
+
+    store.set(currentGameStateAtom, "gameOver");
+    expect(store.get(currentGameInProgressAtom)).toBe(false);
+});
+
+test("an analysis tab is never in progress", () => {
+    const store = storeWithTab("analysis");
+    store.set(currentGameStateAtom, "playing");
+    expect(store.get(currentGameInProgressAtom)).toBe(false);
+});
+
+test("no tab selected is not in progress", () => {
+    const store = createStore();
+    store.set(tabsAtom, []);
+    store.set(activeTabAtom, null);
+    expect(store.get(currentGameInProgressAtom)).toBe(false);
+});