diff --git a/games/routine.py b/games/routine.py
index 20861b1..3e61d46 100644
--- a/games/routine.py
+++ b/games/routine.py
@@ -42,7 +42,7 @@ def get_derive(segment: Segment) -> float:
     if (segment.start.x == segment.stop.x):
         return None
     
-    return (segment.stop.y - segment.start.y) / (segment.stop.x - segment.stop.y)
+    return (segment.stop.y - segment.start.y) / (segment.stop.x - segment.start.x)
 
 def get_intercept(derive: float, point: Point) -> float:
     
@@ -130,13 +130,13 @@ def get_impact_point(segments: list[Segment], ball: Ball):
 
         diff_x: float = ball.position.x - impact.x
         print("x:", diff_x)
-        if (get_sign(diff_x) != get_sign(cos)):
+        if (get_sign(diff_x) == get_sign(cos) and cos != 0):
             continue
         print("OK: X")
         
         diff_y: float = ball.position.y - impact.y
         print("y:", diff_y)
-        if (get_sign(diff_y) == get_sign(sin)):
+        if (get_sign(diff_y) == get_sign(sin) and sin != 0):
             continue
         print("OK: Y")