diff --git a/src/algo.ts b/src/algo.ts
index 0dc2203..74c9ee4 100644
--- a/src/algo.ts
+++ b/src/algo.ts
@@ -147,7 +147,7 @@ export function isSolvable(result: number, plaquettes: number[]): boolean {
     )
   }
 
-  if (histories.length) {
+  if (histories.length && import.meta.env.DEV) {
     printHistory(histories[0])
   }
   return found
diff --git a/src/components/OperationsList.vue b/src/components/OperationsList.vue
index d22e77b..a24f97e 100644
--- a/src/components/OperationsList.vue
+++ b/src/components/OperationsList.vue
@@ -72,7 +72,7 @@ import {
   result,
 } from '@/composables/game-state'
 import { operatorIcons } from '@/composables/operators'
-import { GameState } from '@/globals'
+import { GameStateType } from '@/globals'
 import { Operation } from '@/types'
 import IconEquals from '~icons/ph/equals-bold'
 import IconSad from '~icons/ph/smiley-sad'
@@ -85,7 +85,7 @@ function canOperationBeDeleted(op: Operation): boolean {
 }
 
 function undoOperation(index: number): void {
-  if (gameState.value !== GameState.Playing) return
+  if (gameState.value !== GameStateType.Playing) return
   const len = operations.length
   for (let i = len - 1; i >= index; --i) {
     let popped: Operation
diff --git a/src/components/PlaquettesList.vue b/src/components/PlaquettesList.vue
index de534a2..e4c5f60 100644
--- a/src/components/PlaquettesList.vue
+++ b/src/components/PlaquettesList.vue
@@ -1,6 +1,10 @@
 <template>
   <div
-    class="grid grid-cols-6 grid-rows-2 gap-2 justify-center px-2 mx-auto max-w-sm font-mono">
+    class="grid grid-rows-2 gap-2 justify-center px-2 mx-auto max-w-sm font-mono"
+    :class="{
+      'grid-cols-6': startingNumberOfPlaquettes === 6,
+      'grid-cols-5': startingNumberOfPlaquettes === 5,
+    }">
     <TransitionGroup name="slide_left">
       <PlaquetteBox
         v-for="(item, i) in plaquettes"
@@ -25,6 +29,10 @@
 import { ref } from 'vue'
 
 import PlaquetteBox from '@/components/common/PlaquetteBox.vue'
+import {
+  maxNumberOfOperations,
+  startingNumberOfPlaquettes,
+} from '@/composables/game-state'
 import { Plaquette } from '@/types'
 
 defineProps<{
diff --git a/src/composables/game-state.ts b/src/composables/game-state.ts
index 6adadf5..271b196 100644
--- a/src/composables/game-state.ts
+++ b/src/composables/game-state.ts
@@ -3,25 +3,45 @@ import { utcToZonedTime } from 'date-fns-tz'
 import { computed, reactive, ref } from 'vue'
 
 import { getEmptyOperation, isOperationReady } from '@/algo'
-import { BXL_TZ, GAME_STARTING_DATE, GameState } from '@/globals'
+import {
+  BXL_TZ,
+  GAME_STARTING_DATE,
+  GameDifficultyType,
+  GameStateType,
+} from '@/globals'
 import { Operation, Plaquette } from '@/types'
 import { getCurrentDate } from '@/utils'
 
-export const gameState = ref(GameState.Undefined)
-
+export const gameState = ref(GameStateType.Undefined)
 export const operations = reactive<Operation[]>([getEmptyOperation()])
 export const plaquettes = ref<Plaquette[]>([])
-
 export const result = ref(0)
 
+// #region Difficulty-related constants
+
+export const gameDifficulty = ref(GameDifficultyType.Normal)
+
+export const maxNumberOfOperations = computed(() =>
+  gameDifficulty.value === GameDifficultyType.Hard ? 5 : 4,
+)
+
+export const startingNumberOfPlaquettes = computed(() =>
+  gameDifficulty.value === GameDifficultyType.Hard ? 6 : 5,
+)
+
+// #endregion Difficulty-related constants
+
 export const currentOperation = computed(
   () => operations[operations.length - 1],
 )
 
-export const gameIsRunning = computed(() => gameState.value > GameState.Loading)
+export const gameIsRunning = computed(
+  () => gameState.value > GameStateType.Loading,
+)
 export const isEndGame = computed(
   () =>
-    (operations.length === 5 && isOperationReady(currentOperation.value)) ||
+    (operations.length === maxNumberOfOperations.value &&
+      isOperationReady(currentOperation.value)) ||
     isResultPerfect.value,
 )
 
diff --git a/src/globals.ts b/src/globals.ts
index 33dad83..8aaadc6 100644
--- a/src/globals.ts
+++ b/src/globals.ts
@@ -13,9 +13,14 @@ export const pools = {
   3: [5, 5, 5, 5, 5, 2, 2, 2, 2, 2],
 } as const
 
-export enum GameState {
+export enum GameStateType {
   Undefined = 0,
   Waiting = 1,
   Loading = 2,
   Playing = 3,
 }
+
+export enum GameDifficultyType {
+  Normal = 1,
+  Hard = 2,
+}
diff --git a/src/locales/en.json b/src/locales/en.json
index 8816a98..bd4ae90 100644
--- a/src/locales/en.json
+++ b/src/locales/en.json
@@ -15,5 +15,7 @@
   "gameDescription": "Combine the numbers to reach the result.",
   "randomDescription": "A challenge at random, just for fun.",
   "copiedInClipboard": "Copied in clipboard",
-  "soon": "Soon"
+  "soon": "Soon",
+  "dailyHard": "Hard Mode",
+  "dailyNormal": "Normal Mode"
 }
diff --git a/src/locales/fr.json b/src/locales/fr.json
index 66f0917..8b21987 100644
--- a/src/locales/fr.json
+++ b/src/locales/fr.json
@@ -15,5 +15,7 @@
   "share": "Partager",
   "finishDailyToPlayRandom": "Terminez le défi quotidien pour débloquer.",
   "copiedInClipboard": "Copié dans le presse-papier",
-  "soon": "Bientôt"
+  "soon": "Bientôt",
+  "dailyNormal": "Mode Normal",
+  "dailyHard": "Mode Difficile"
 }
diff --git a/src/router/index.ts b/src/router/index.ts
index 520cfd2..ab3adab 100644
--- a/src/router/index.ts
+++ b/src/router/index.ts
@@ -12,14 +12,14 @@ const router = createRouter({
       meta: { transition: '' },
     },
     {
-      path: '/daily',
-      name: 'daily',
+      path: '/hard',
+      name: 'hard',
       component: () => import('../views/GameView.vue'),
       meta: { transition: 'route' },
     },
     {
-      path: '/random',
-      name: 'random',
+      path: '/normal',
+      name: 'normal',
       component: () => import('../views/GameView.vue'),
       meta: { transition: 'route' },
     },
diff --git a/src/types.ts b/src/types.ts
index a6bce34..2b8f6cd 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -18,3 +18,23 @@ export type GameStats = {
   nbGames: number
   games: { [key: string]: { score: number; won: boolean } }
 }
+
+//
+//
+//
+
+type SerializableOperation = {
+  left: number
+  right: number
+  operator: OperatorType
+}
+
+type SrGame = {
+  type: 'daily' | 'random'
+  over: boolean
+  won: boolean
+}
+
+export type GameState = {
+  games: SrGame[]
+}
diff --git a/src/utils.ts b/src/utils.ts
index 6669ad9..700c867 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -77,7 +77,7 @@ export function shuffle<T>(array: T[]): T[] {
 
 function initDailyPRNG(): () => number {
   // Prefix the seed when in dev to avoid spoiling myself while working on it
-  const prefix = import.meta.env.DEV ? 'dev-' : ''
+  const prefix = ''// import.meta.env.DEV ? 'dev-' : ''
   const hashed = hashStr(prefix + getCurrentSessionKey())
   return mulberry32(hashed)
 }
diff --git a/src/views/GameView.vue b/src/views/GameView.vue
index fc7cabf..9864e53 100644
--- a/src/views/GameView.vue
+++ b/src/views/GameView.vue
@@ -10,9 +10,13 @@
     <Transition name="zero_height">
       <div
         class="text-center"
-        v-if="gameState <= GameState.Waiting">
-        <div v-if="isDaily">
-          {{ t('dailyDescription') }}<br>
+        v-if="gameState <= GameStateType.Waiting">
+        {{ t('dailyDescription') }}<br><br>
+        <div v-if="isHardMode">
+          {{ t('hardModeDescription') }}
+        </div>
+        <div v-else>
+          {{ t('normalModeDescription') }}
         </div>
 
         <button
@@ -54,13 +58,6 @@
           v-else
           v-html="t('endGame.failureLabel')" />
         <button
-          v-if="!isDaily"
-          class="btn-border"
-          @click="reboot">
-          {{ t('playAgain') }}
-        </button>
-        <button
-          v-else
           @click="toClipboard"
           class="inline-flex items-center btn-border">
           <IconShare class="mr-2" />
@@ -74,7 +71,7 @@
 <script setup lang="ts">
 import { computed, onMounted, onUnmounted, ref, watch } from 'vue'
 import { useI18n } from 'vue-i18n'
-import { useRoute, useRouter } from 'vue-router'
+import { useRoute } from 'vue-router'
 
 import {
   getEmptyOperation,
@@ -90,6 +87,7 @@ import PlaquettesList from '@/components/PlaquettesList.vue'
 import {
   clearOperationsList,
   currentOperation,
+  gameDifficulty,
   gameIsRunning,
   gameState,
   isEndGame,
@@ -100,7 +98,7 @@ import {
 } from '@/composables/game-state'
 import { toClipboard } from '@/composables/sharing'
 import { hasPlayed } from '@/composables/statistics'
-import { GameState, pools } from '@/globals'
+import { GameDifficultyType, GameStateType, pools } from '@/globals'
 import { OperatorType, Plaquette } from '@/types'
 import {
   getCurrentSessionKey,
@@ -118,10 +116,12 @@ const { t } = useI18n() // call `useI18n`, and spread `t` from  `useI18n` return
  * Computed & refs
  */
 
-const pool = ref<1 | 2 | 3>(1)
+const poolType = ref<1 | 2 | 3>(1)
 const cmpPlaquettes = ref<InstanceType<typeof PlaquettesList> | null>(null)
 
-const isDaily = computed(() => useRoute()?.name === 'daily')
+const isHardMode = computed(
+  () => gameDifficulty.value === GameDifficultyType.Hard,
+)
 const shownPlaquettes = computed(() =>
   gameIsRunning.value ? plaquettes.value : [],
 )
@@ -148,8 +148,8 @@ watch(
 )
 
 function startGame(): void {
-  gameState.value = GameState.Loading
-  setTimeout(() => (gameState.value = GameState.Playing), 500)
+  gameState.value = GameStateType.Loading
+  setTimeout(() => (gameState.value = GameStateType.Playing), 500)
   setTimeout(() => {
     if (cmpPlaquettes.value) {
       // Remove the animation delay for the plaquettes,
@@ -185,15 +185,15 @@ function selectOperator(o: OperatorType): void {
 }
 
 function reboot(): void {
-  gameState.value = GameState.Playing
+  gameState.value = GameStateType.Playing
 
   // The daily number is >= 500 to have a minimum challenge
-  const minValue = isDaily.value ? 500 : 101
-
+  const minValue = isHardMode.value ? 500 : 101
+  const numPlaquettes = isHardMode.value ? 6 : 5
   do {
     // Find a problem
     // result.value = randRange(101, 1000)
-    pool.value = randItem([1, 1, 1, 1, 1, 2, 3])
+    poolType.value = randItem([1, 1, 1, 1, 1, 2, 3])
     result.value = randRange(minValue, 1000)
     // result.value = 29
     // Reset Operations list
@@ -201,8 +201,8 @@ function reboot(): void {
 
     // Generate result and plaquettes
     plaquettes.value = []
-    const poolCopy = [...pools[pool.value]]
-    for (let i = 0; i < 6; ++i) {
+    const poolCopy = [...pools[poolType.value]]
+    for (let i = 0; i < numPlaquettes; ++i) {
       const rndItem = Math.floor(random() * poolCopy.length)
       const el = poolCopy.splice(rndItem, 1)[0]
       plaquettes.value.push({ value: el, free: true })
@@ -213,7 +213,7 @@ function reboot(): void {
     // }))
     // Solve it
   } while (
-    (isDaily.value ? !isHardEnough(result.value) : false) ||
+    (isHardMode.value ? !isHardEnough(result.value) : false) ||
     !isSolvable(
       result.value,
       plaquettes.value.map(p => p.value),
@@ -227,33 +227,24 @@ function reboot(): void {
  */
 
 onMounted(() => {
-  // if (!isDaily.value && !hasPlayed(getCurrentSessionKey())) {
-  //   const router = useRouter()
-  //   router.replace({ name: 'home' })
-  //   return
-  // }
-
-  if (isDaily.value) {
-    console.log('daily rng')
-    setDailyPRNG()
-  }
-  else {
-    console.log('normal rng')
-    setMathPRNG()
-  }
+  gameDifficulty.value =
+    useRoute()?.name === 'hard'
+      ? GameDifficultyType.Hard
+      : GameDifficultyType.Normal
 
+  setDailyPRNG()
   result.value = 0
 
   // Wait until after the page transion to generate the number
   setTimeout(() => {
     reboot()
-    gameState.value = GameState.Waiting
+    gameState.value = GameStateType.Waiting
   }, 800)
   // But make sure the operations list is empty asap
   clearOperationsList()
 })
 
 onUnmounted(() => {
-  gameState.value = GameState.Waiting
+  gameState.value = GameStateType.Waiting
 })
 </script>
diff --git a/src/views/HomeView.vue b/src/views/HomeView.vue
index 61c7ab0..89afaa8 100644
--- a/src/views/HomeView.vue
+++ b/src/views/HomeView.vue
@@ -2,47 +2,35 @@
   <div class="flex flex-col grow p-1 w-full text-center">
     <div class="flex flex-col grow gap-16 justify-center md:mt-16">
       <div>
-        {{ t('gameDescription') }}<br>
+        {{ t('gameDescription') }}<br><br>
+        <span v-html="t('dailyDescription')" />
+
         <br>
       </div>
-      <!-- Daily -->
+
+      <!-- Normal -->
       <div class="flex flex-col gap-4 items-center">
         <RouterLink
-          to="/daily"
+          to="/normal"
           class="text-2xl btn-border">
-          {{ t('dailyGame') }}
+          {{ t('dailyNormal') }}
         </RouterLink>
-        <span v-html="t('dailyDescription')" />
       </div>
 
-      <!-- Random -->
+      <!-- Hard -->
       <div class="flex flex-col gap-4 items-center">
         <RouterLink
-          :to="canPlayRandom ? '/random' : ''"
-          class="text-2xl btn-border"
-          :class="{ 'btn-disabled': !canPlayRandom }">
-          {{ t('randomGame') }}
+          to="/hard"
+          class="text-2xl btn-border">
+          {{ t('dailyHard') }}
         </RouterLink>
-        {{ t('soon') }} ™
-        <!-- {{ t('randomDescription') }} -->
-        <!-- <span
-          class="italic"
-          v-if="!canPlayRandom">{{
-            t('finishDailyToPlayRandom')
-          }}
-          </span> -->
       </div>
+
     </div>
   </div>
 </template>
 
 <script setup lang="ts">
-import { computed } from 'vue'
 import { useI18n } from 'vue-i18n'
-
-import { hasPlayed } from '@/composables/statistics'
-import { getCurrentSessionKey } from '@/utils'
-
 const { t } = useI18n()
-const canPlayRandom = computed(() => hasPlayed(getCurrentSessionKey()))
 </script>