diff --git a/src/c/funktionen.c b/src/c/funktionen.c
index 7ebe834..6292eba 100644
--- a/src/c/funktionen.c
+++ b/src/c/funktionen.c
@@ -69,30 +69,6 @@ int x_wins_02_11_20(char board[][3]) {
     }    
 }
 
-int o_wins_00_10_20(char board[][3]) {
-    if (board[0][0] == 'O' && board[1][0] == 'O' && board[2][0] == 'O') {
-        return 1;
-    }
-}
-
-int o_wins_01_11_21(char board[][3]) {
-    if (board[0][1] == 'O' && board[1][1] == 'O' && board[2][1] == 'O') {
-	return 1;
-    }
-}
-
-int o_wins_02_12_22(char board[][3]) {
-    if (board[0][2] == 'O' && board[1][2] == 'O' && board[2][2] == 'O') {
-	return 1;
-    }
-}
-
-int o_wins_00_01_02(char board[][3]) {
-    if (board[0][0] == 'O' && board[0][1] == 'O' && board[0][2] == 'O') {
-	return 1;
-    }
-}
-
 int stringCharacterCounter(char string[]) {
     int stringLength = 0;
 
diff --git a/src/c/funktionen.h b/src/c/funktionen.h
index bed723d..050ff6e 100644
--- a/src/c/funktionen.h
+++ b/src/c/funktionen.h
@@ -47,21 +47,6 @@ int x_wins_00_11_22(char board[][3]);
 int x_wins_02_11_20(char board[][3]);
 // prüft, ob X bei Index 02, 11, 20 ist
 
-int o_wins_00_10_20(char board[][3]);
-// prüft, ob O bei Index 00, 10, 20 ist.
-
-int o_wins_01_11_21(char board[][3]);
-// prüft, ob O bei Index 01, 11, 21 ist.
-
-int o_wins_02_12_22(char board[][3]);
-// prüft, ob O bei Index 02, 12, 22 ist.
-
-int o_wins_00_01_02(char board[][3]);
-// prüft, ob O bei Index 00, 01, 02 ist.
-
-int string_character_counter(char string[]);
-
-
 int stringCharacterCounter(char string[]);
 // liefert die Länge eines Strings zurück
 
diff --git a/src/test/test_funktionen.c b/src/test/test_funktionen.c
index e218424..dd90bdc 100644
--- a/src/test/test_funktionen.c
+++ b/src/test/test_funktionen.c
@@ -275,66 +275,6 @@ void test_x_wins_onIndex_02_11_20(void)
     TEST_ASSERT_EQUAL_INT(expected, actual);
 }
 
-void test_o_wins_onIndex_00_10_20(void)
-{
-    /* arrange */
-    int actual;
-    int expected = 1;
-    
-    char board[][3] = {{'O',' ',' '}, {'O',' ',' '}, {'O',' ',' '}};
-
-    /* act */
-    actual = o_wins_00_10_20(board);
-
-    /* assert */
-    TEST_ASSERT_EQUAL_INT(expected, actual);
-}
-
-void test_o_wins_onIndex_01_11_21(void)
-{
-    /* arrange */
-    int actual;
-    int expected = 1;
-    
-    char board[][3] = {{' ','O',' '}, {' ','O',' '}, {' ','O',' '}};
-
-    /* act */
-    actual = o_wins_01_11_21(board);
-
-    /* assert */
-    TEST_ASSERT_EQUAL_INT(expected, actual);
-}
-
-void test_o_wins_onIndex_02_12_22(void)
-{
-    /* arrange */
-    int actual;
-    int expected = 1;
-    
-    char board[][3] = {{' ',' ','O'}, {' ',' ','O'}, {' ',' ','O'}};
-
-    /* act */
-    actual = o_wins_02_12_22(board);
-
-    /* assert */
-    TEST_ASSERT_EQUAL_INT(expected, actual);
-}
-
-void test_o_wins_onIndex_00_01_02(void)
-{
-    /* arrange */
-    int actual;
-    int expected = 1;
-    
-    char board[][3] = {{'O','O','O'}, {' ',' ',' '}, {' ',' ',' '}};
-
-    /* act */
-    actual = o_wins_00_01_02(board);
-
-    /* assert */
-    TEST_ASSERT_EQUAL_INT(expected, actual);
-}
-
 void test_stringLaenge_von_Kokosnuss(void)
 {
     /* arrange */