diff --git a/src/Turm.c b/src/Turm.c
index 54eaa51..e81c819 100644
--- a/src/Turm.c
+++ b/src/Turm.c
@@ -10,21 +10,43 @@ bool istzugerlaubt_Turm(char** Brett, int startX, int startY, int endX, int endY
 int counter = 0;
 
  if(startX == startY){
-    counter = endY-startY;
+    if(startY<endY){
+        counter = endY-startY;
     for(int i = 0; i<counter;i++){
         if(Brett[startY+i][startX] != ' '){
             return false;
         }
     }
+    }else{
+        counter = startY-endY;
+    for(int i = 0; i<counter;i++){
+        if(Brett[startY-i][startX] != ' '){
+            return false;
+        }
+    }
+    }
+    
 
  }else if(startY == endY){
-    counter = endX-startX;
-    for(int i = 0; i<counter;i++){
+    if(startX<endX){
+        counter = endX-startX;
+        for(int i = 0; i<counter;i++){
         if(Brett[startY][startX+i] != ' '){
             return false;
         }
     } 
+    }else{
+        counter = startX-endX;
+        for(int i = 0; i<counter;i++){
+        if(Brett[startY][startX-i] != ' '){
+            return false;
+        }
+    } 
+    }
+    
  }
+    
+
 return true;
 }
 
diff --git a/test/test_Turm.c b/test/test_Turm.c
index 1d2b6de..d3515ef 100644
--- a/test/test_Turm.c
+++ b/test/test_Turm.c
@@ -61,6 +61,31 @@ void test_Turm_X_Bewegung(void) {
     free(brett);
 }
 
+void test_Turm_negative_Y_Bewegung(void) {
+
+    char** brett = Schachbrett_erstellen();
+    int startX = 0;
+    int startY = 4;
+    int endX = 0;
+    int endY = 2;
+    Player player = PLAYER_WHITE;
+    
+
+    TEST_ASSERT_NOT_NULL(brett);
+
+    brett[4][0] = 'r';
+    print_Schachfeld(brett);
+    
+
+    TEST_ASSERT_TRUE(istzugerlaubt_Turm(brett, startX, startY, endX, endY, player));
+
+    
+    for (int i = 0; i < 8; i++) {
+        free(brett[i]);
+    }
+    free(brett);
+}
+
 #endif // TEST