diff --git a/README.md b/README.md
index df575b5..246e917 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ At the moment, an alpha version is undertaken, with these features:
 - Show movements through works (`sw work_number`)
 - Mark movement as mastered for active user (`m number_of_work number_of_movement`)
 - Show possible commands (`h`)
-- (planned) Show mastered works/movements for activated user
+- (planned) Show mastered movements for activated user
 - (planned) display, if work or movement is mastered from active user when viewing works and movements
 - (planned) Save recordings per movement in db
 - (planned) Listen to saved recordings
diff --git a/rep_cli.py b/rep_cli.py
index ed9d71d..14d0ea4 100644
--- a/rep_cli.py
+++ b/rep_cli.py
@@ -12,6 +12,7 @@ class Session:
                          'm': (self.mark_work_as_mastered, 'Marks work or movement as mastered for the active user\n   Usage: m number_of_work, m number_of_work number_of_movement'),
                          'n': (self.create_new_user, 'Creates new user\n   Usage: n firstname name'),
                          's': (self.show_works, 'Show the works stored in the database\n   Usage: s, s number_of_composer'),
+                         'sm': (self.show_mastered, 'Show mastered movements for activated user'),
                          'sw': (self.show_movements, 'Show movements of a work\n   Usage: sw work_number'),
                          'su': (self.show_users, 'Show all users'),
                          'q': (self.quit, 'Quits the program')
@@ -80,6 +81,35 @@ class Session:
                 fun_resultstring += f'{key}: {value[1]}\n'
         return fun_resultstring
 
+    def show_mastered(self, _):
+        fun_resultstring = 'Please activate user'
+        if not self.user == -1:
+            sql_command = f'''
+                          SELECT work_id
+                          FROM is_able_to_play
+                          WHERE pianist_id = {self.user}
+                          GROUP BY work_id
+                          '''
+            list_of_work_ids = self.db_agent.execute(sql_command).fetchall()
+            list_of_works = list()
+            for item in list_of_work_ids:
+                list_of_works.append(work_under_id(item[0], self.db_agent))
+            fun_resultstring = 'All mastered movements:\n'
+            for work in list_of_works:
+                for mov_number in work.values['movements'].keys():
+                    # check if movement is mastered
+                    sql_command = f'''
+                                  SELECT *
+                                  FROM is_able_to_play
+                                  WHERE work_id = {work.id()}
+                                    AND mov_id = {mov_number}
+                                    AND pianist_id = {self.user}
+                                  '''
+                    is_mastered = len(self.db_agent.execute(sql_command).fetchall()) > 0
+                    if is_mastered:
+                        fun_resultstring += f'{work.id()} {mov_number}. {work.pretty_mov(mov_number)}\n'
+        return fun_resultstring
+
     def show_movements(self, arguments):
         work_id = arguments[0]
         work = work_under_id(work_id, self.db_agent)
@@ -122,7 +152,7 @@ class Session:
         work_id = arguments[0]
         resultstring = 'adding:\n'
         work = work_under_id(work_id, self.db_agent)
-        if len(arguments) > 1:
+        if len(arguments) > 1: # in case there is a movement number given
             mov_number = int(arguments[1])
             sql_command = f'''
                           INSERT INTO is_able_to_play (work_id, mov_id, pianist_id)
@@ -130,7 +160,7 @@ class Session:
                           '''
             self.db_agent.execute(sql_command)
             resultstring += f'{work.pretty_mov(mov_number)}\n'
-        else:
+        else: # mark all movements of the work as mastered
             for mov_number in work.values['movements'].keys():
                 sql_command = f'''
                               INSERT INTO is_able_to_play (work_id, mov_id, pianist_id)