diff --git a/frontend/ui/package-lock.json b/frontend/ui/package-lock.json
index 7ab00696..aed2c386 100644
--- a/frontend/ui/package-lock.json
+++ b/frontend/ui/package-lock.json
@@ -707,6 +707,11 @@
       "integrity": "sha1-tdRU3CGZriJWmfNGfloH87lVuv0=",
       "dev": true
     },
+    "hash-wasm": {
+      "version": "4.9.0",
+      "resolved": "https://registry.npmjs.org/hash-wasm/-/hash-wasm-4.9.0.tgz",
+      "integrity": "sha512-7SW7ejyfnRxuOc7ptQHSf4LDoZaWOivfzqw+5rpcQku0nHfmicPKE51ra9BiRLAmT8+gGLestr1XroUkqdjL6w=="
+    },
     "ignore": {
       "version": "4.0.6",
       "resolved": "https://registry.npmjs.org/ignore/-/ignore-4.0.6.tgz",
diff --git a/frontend/ui/package.json b/frontend/ui/package.json
index 0e8b6d29..019c9eb3 100644
--- a/frontend/ui/package.json
+++ b/frontend/ui/package.json
@@ -27,6 +27,7 @@
     "bootstrap": "^5.1.0",
     "bootstrap-icons": "^1.5.0",
     "bootswatch": "^5.1.0",
+    "hash-wasm": "^4.9.0",
     "seedrandom": "^3.0.5"
   }
 }
diff --git a/frontend/ui/src/components/ExerciceFlags.svelte b/frontend/ui/src/components/ExerciceFlags.svelte
index 1c5063c9..4ae8026d 100644
--- a/frontend/ui/src/components/ExerciceFlags.svelte
+++ b/frontend/ui/src/components/ExerciceFlags.svelte
@@ -12,6 +12,10 @@
      Spinner,
  } from 'sveltestrap';
 
+ import { blake2b } from 'hash-wasm';
+
+ import { my } from '../stores/my.js';
+
  import DateFormat from './DateFormat.svelte';
  import FlagKey from './FlagKey.svelte';
  import FlagMCQ from './FlagMCQ.svelte';
@@ -36,42 +40,89 @@
      })
  }
 
+ export let forcesolved = false;
  let responses = { };
  async function submitFlags() {
      submitInProgress = true;
      sberr = "";
      message = "";
 
-     const response = await fetch(
-         "submit/" + exercice.id,
-         {
-             method: "POST",
-             headers: {'Accept': 'application/json'},
-             body: JSON.stringify(responses),
-         }
-     )
+     if ($my && $my.team_id === 0) {
+         let allGoodResponse = true;
+         for (const f in flags) {
+             const flag = flags[f];
+
+             let soluce = "";
+             if (flag.type == "mcq") {
+                 for (const c in flag.choices) {
+                     soluce += responses.mcqs[c] ? "t" : "f";
+                 }
+             } else {
+                 soluce = responses.flags[flag.id];
+             }
+
+             if (flag.ignore_case) {
+                 soluce = soluce.toLowerCase();
+             }
+
+             if (flag.validator_regexp) {
+                 let re = new RegExp(flag.validator_regexp, flag.ignore_case?'i':'');
+                 soluce = soluce.match(re).slice(1).join("+");
+             }
+
+             if (await blake2b(soluce) == flag.soluce) {
+                 flags[f].found = new Date();
+             } else if (!flag.found) {
+                 allGoodResponse = false;
+             }
+             flags = flags;
+         }
+
+         if (allGoodResponse) {
+             forcesolved = true;
+         }
+
+         if (exercice.tries) {
+             exercice.tries += 1;
+         } else {
+             exercice.tries = 1;
+         }
+         exercice.solved_time = new Date();
+         exercice = exercice;
 
-     if (response.status < 300) {
-         const data = await response.json();
-	 messageClass = 'text-success';
-	 message = data.errmsg;
-         waitDiff(20);
-     } else {
          submitInProgress = false;
+     } else {
+         const response = await fetch(
+             "submit/" + exercice.id,
+             {
+                 method: "POST",
+                 headers: {'Accept': 'application/json'},
+                 body: JSON.stringify(responses),
+             }
+         )
 
-	 messageClass = 'text-danger';
-
-         let data = "";
-         try {
-             data = await response.json();
-         } catch(e) {
-             data = null;
-         }
-
-	 if (data && data.errmsg)
+         if (response.status < 300) {
+             const data = await response.json();
+	     messageClass = 'text-success';
 	     message = data.errmsg;
-	 if (response.statys != 402)
-	     sberr = "Oups !";
+             waitDiff(20);
+         } else {
+             submitInProgress = false;
+
+	     messageClass = 'text-danger';
+
+             let data = "";
+             try {
+                 data = await response.json();
+             } catch(e) {
+                 data = null;
+             }
+
+	     if (data && data.errmsg)
+	         message = data.errmsg;
+	     if (response.statys != 402)
+	         sberr = "Oups !";
+         }
      }
  }
 
diff --git a/frontend/ui/src/components/ExerciceHints.svelte b/frontend/ui/src/components/ExerciceHints.svelte
index e8a8063d..70b1e0cb 100644
--- a/frontend/ui/src/components/ExerciceHints.svelte
+++ b/frontend/ui/src/components/ExerciceHints.svelte
@@ -39,6 +39,11 @@
      })
  }
 
+ function showHint(hint) {
+     hint.hidden = false;
+     hints = hints; // Force Svelte update
+ }
+
  async function openHint(hint) {
      hints_submitted[hint.id] = true;
      hinterror = "";
@@ -122,7 +127,7 @@
                             </button>
                         {/if}
                         {#if !hint.file && hint.hidden}
-		            <button type="button" ng-click="hint.hidden = false;" class="btn btn-info">
+		            <button type="button" on:click={() => showHint(hint)} class="btn btn-info">
                                 <Icon name="lock" aria-hidden="true" />
                                 Afficher
                             </button>
diff --git a/frontend/ui/src/routes/[theme]/[exercice].svelte b/frontend/ui/src/routes/[theme]/[exercice].svelte
index 41452c6b..7b8a0cb6 100644
--- a/frontend/ui/src/routes/[theme]/[exercice].svelte
+++ b/frontend/ui/src/routes/[theme]/[exercice].svelte
@@ -47,6 +47,7 @@
 
  export let theme;
  export let exercice;
+ let solved = {};
 
  export let refresh_my;
  export let refresh_teams;
@@ -158,11 +159,12 @@
             </Col>
             {/if}
             <Col lg="6" class="mb-5">
-            {#if !$my.exercices[exercice.id].solved_rank}
+            {#if !$my.exercices[exercice.id].solved_rank && !solved[exercice.id]}
                 <ExerciceFlags
                     {refresh_my}
                     {refresh_teams}
                     exercice={$my.exercices[exercice.id]}
+                    bind:forcesolved={solved[exercice.id]}
                     flags={$my.exercices[exercice.id].flags}
                 />
             {:else}
diff --git a/frontend/ui/src/routes/__layout.svelte b/frontend/ui/src/routes/__layout.svelte
index 438dead2..56aa0ec4 100644
--- a/frontend/ui/src/routes/__layout.svelte
+++ b/frontend/ui/src/routes/__layout.svelte
@@ -5,6 +5,8 @@
  import { themesStore } from '../stores/themes.js';
  import { settings, time } from '../stores/settings.js';
 
+ let stop_refresh = false;
+
  let refresh_interval_settings = null;
  async function refresh_settings(cb=null, interval=null) {
      if (refresh_interval_settings)
@@ -12,6 +14,9 @@
      if (interval === null) {
          interval = Math.floor(Math.random() * 24000) + 32000;
      }
+     if (stop_refresh) {
+         return;
+     }
      refresh_interval_settings = setInterval(refresh_settings, interval);
 
      if (!cb) {
@@ -43,6 +48,9 @@
      if (interval === null) {
          interval = Math.floor(Math.random() * 24000) + 32000;
      }
+     if (stop_refresh) {
+         return;
+     }
      refresh_interval_teams = setInterval(refresh_teams, interval);
 
      teamsStore.update(await fetch('teams.json', {headers: {'Accept': 'application/json'}}), cb);
@@ -55,6 +63,9 @@
      if (interval === null) {
          interval = Math.floor(Math.random() * 24000) + 32000;
      }
+     if (stop_refresh) {
+         return;
+     }
      refresh_interval_themes = setInterval(refresh_themes, interval);
 
      await themesStore.update(await fetch('themes.json', {headers: {'Accept': 'application/json'}}), cb);
@@ -67,6 +78,9 @@
      if (interval === null) {
          interval = Math.floor(Math.random() * 24000) + 24000;
      }
+     if (stop_refresh) {
+         return;
+     }
      refresh_interval_my = setInterval(refresh_my, interval);
 
      my.update(await fetch('my.json', {headers: {'Accept': 'application/json'}}), cb);
@@ -79,6 +93,9 @@
      if (interval === null) {
          interval = Math.floor(Math.random() * 24000) + 32000;
      }
+     if (stop_refresh) {
+         return;
+     }
      refresh_interval_issues = setInterval(refresh_issues, interval);
 
      issuesStore.update(await fetch('issues.json', {headers: {'Accept': 'application/json'}}), cb);
@@ -88,7 +105,11 @@
      await refresh_settings();
      await refresh_themes();
      refresh_teams();
-     refresh_my();
+     refresh_my((my) => {
+         if (my && my.team_id === 0) {
+             stop_refresh = true;
+         }
+     });
      refresh_issues();
 
      return {
diff --git a/frontend/ui/src/stores/my.js b/frontend/ui/src/stores/my.js
index 72f4be00..7500cd52 100644
--- a/frontend/ui/src/stores/my.js
+++ b/frontend/ui/src/stores/my.js
@@ -10,6 +10,12 @@ function createMyStore() {
         res_my.json().then((my) => {
           for (let k in my.exercices) {
             my.exercices[k].id = k;
+
+            if (my.team_id === 0 && my.exercices[k].hints) {
+              for (let j in my.exercices[k].hints) {
+                my.exercices[k].hints[j].hidden = true;
+              }
+            }
           }
 
           update((m) => (Object.assign(m?m:{}, my)));