diff --git a/app.py b/app.py
index 97623a2..57f13c3 100644
--- a/app.py
+++ b/app.py
@@ -468,6 +468,21 @@ def reset_quiz(playlist_id):
         return redirect(url_for('quiz', playlist_id=playlist_id, mode=next_mode))
     return redirect(url_for('playlists'))
 
+@app.route("/update_player_score/<playlist_id>", methods=["POST"])
+def update_player_score(playlist_id):
+    """Aktualisiert den Score eines einzelnen Spielers in der Session."""
+    data = request.json
+    player_id = data.get('player_id')  # 1-basiert
+    delta = data.get('delta', 0)
+    if not player_id:
+        return {"error": "Missing player_id"}, 400
+    key = f'player_scores_{playlist_id}'
+    player_scores = session.get(key, [0, 0, 0, 0])
+    player_scores[player_id - 1] += delta
+    session[key] = player_scores
+    session.modified = True
+    return {"success": True, "new_score": player_scores[player_id - 1]}
+
 @app.route("/reset_scores/<playlist_id>")
 def reset_scores(playlist_id):
     """Reset nur die Scores, aber behalte gespielte Tracks."""
diff --git a/templates/quiz_buzzer_multiplayer.html b/templates/quiz_buzzer_multiplayer.html
index 7dbd639..fd2b222 100644
--- a/templates/quiz_buzzer_multiplayer.html
+++ b/templates/quiz_buzzer_multiplayer.html
@@ -688,10 +688,19 @@
       });
     }
 
+    function applyScoreToServer(playerId, delta) {
+      return fetch('/update_player_score/{{ playlist_id }}', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ player_id: playerId, delta: delta })
+      });
+    }
+
     function continueGame() {
-      // Wende Minuspunkte an
+      // Wende Minuspunkte an (lokal und auf Server)
       players[currentBuzzer - 1].score += pendingPoints;
       updateScoreboard();
+      applyScoreToServer(currentBuzzer, pendingPoints);
       
       // Reset für nächsten Buzzer
       document.getElementById('answerSection').classList.remove('active');
@@ -718,9 +727,10 @@
     }
 
     function showSolution() {
-      // Wende Minuspunkte an
+      // Wende Minuspunkte an (lokal und auf Server)
       players[currentBuzzer - 1].score += pendingPoints;
       updateScoreboard();
+      applyScoreToServer(currentBuzzer, pendingPoints);
       
       const resultContainer = document.getElementById('resultContainer');
       resultContainer.innerHTML = `