diff --git a/app.py b/app.py
index 0eeae6b..860c690 100644
--- a/app.py
+++ b/app.py
@@ -243,14 +243,19 @@ def search_track():
 @app.route("/check_answer", methods=["POST"])
 def check_answer():
     data = request.json
-    guess = data.get('guess', '').lower()
-    correct_answer = data.get('correct_answer', '').lower()
+    guess = data.get('guess', '')
+    correct_answer = data.get('correct_answer', '')
     game_mode = data.get('game_mode', 'artist')
     playlist_id = data.get('playlist_id')
 
-    if game_mode == 'title':
-        guess = clean_title(guess)
-        correct_answer = clean_title(correct_answer)
+    # Bereinige BEIDE Strings vor dem Vergleich (für title UND artist)
+    if game_mode == 'title' or game_mode == 'artist':
+        guess = clean_title(guess).lower()
+        correct_answer = clean_title(correct_answer).lower()
+    else:
+        # Jahr-Modus: nur lowercase
+        guess = guess.lower()
+        correct_answer = correct_answer.lower()
 
     if game_mode == 'year':
         is_correct = guess == correct_answer