diff --git a/src/statemanager.ts b/src/statemanager.ts
index a30cdb3..50489ec 100644
--- a/src/statemanager.ts
+++ b/src/statemanager.ts
@@ -15,15 +15,22 @@ const N_TURNS: number = 9;
 
 export class StateManager {
   #turn: number;
+  #revision: number;
 
   constructor() {
     this.#turn = 1;
+    this.#revision = 1;
   }
 
   getTurn(): number {
     return this.#turn;
   }
 
+  nextRevision(): number {
+    this.#revision++;
+    return this.#revision;
+  }
+
   startFirstGame() {
     getVNModal().play([
       ...openingScene,