diff --git a/h2/mbc.py b/h2/mbc.py
index b0758a6..18cd630 100644
--- a/h2/mbc.py
+++ b/h2/mbc.py
@@ -1,11 +1,7 @@
-import random
 import statistics
 from math import inf
 from typing import Set, List, Tuple
 
-from scipy.optimize import linprog
-
-import util
 from util import Side, Point, gen_point, display
 
 
@@ -46,10 +42,12 @@ def solve_2dlp(c: Tuple[float, float], constraints: List[Tuple[Tuple[float, floa
     :return: x1, x2
     """
     c1, c2 = c
-    x1, x2 = (-inf, -inf) if c1 > 0 else (inf, inf)
+    x1 = -inf if c1 > 0 else inf
+    x2 = -inf if c2 > 0 else inf
+
     #random.shuffle(constraints)
 
-    for i, ((a1, a2), b) in enumerate(constraints[1:], start=0):
+    for i, ((a1, a2), b) in enumerate(constraints[1:]):
         if not a1*x1 + a2*x2 <= b:
             x1 = solve_1dlp(c1 - c2*a1/a2,
                             [(ai1 - ai2*a1 / a2, bi - ai2*b / a2) for (ai1, ai2), bi in constraints[:i]])
@@ -70,8 +68,8 @@ def mbc_ch(points: Set[Point], flipper: callable) -> Set[Point]:
     pr = {p for p in points if p.x >= med_x}
 
     # Find the bridge over the vertical line in pm
-    slope, intercept = solve_2dlp((flipper(med_x), flipper(1)),
-                                  [((flipper(-p.x), flipper(-1)), flipper(-p.y)) for p in points])
+    slope, intercept = solve_2dlp((flipper(med_x), flipper(1)),  # confirmed correct
+                                  [((flipper(-p.x), flipper(-1)), flipper(-p.y)) for p in points])  # confirmed correct
 
     # Find the two points which are on the line, should work
     on = {p for p in points if sidedness(slope, intercept, p, flipper) == Side.ON}
@@ -79,8 +77,8 @@ def mbc_ch(points: Set[Point], flipper: callable) -> Set[Point]:
     right_point = max(on)
 
     # Prune the points between the two line points
-    pl = {p for p in points if p.x <= left_point.x}
-    pr = {p for p in points if p.x >= right_point.x}
+    pl = {p for p in pl if p.x <= left_point.x}
+    pr = {p for p in pr if p.x >= right_point.x}
 
     return set.union(mbc_ch(pl, flipper), {left_point, right_point}, mbc_ch(pr, flipper))
 
diff --git a/h2/tmptest.py b/h2/tmptest.py
index e75124c..6c473ad 100644
--- a/h2/tmptest.py
+++ b/h2/tmptest.py
@@ -7,11 +7,11 @@ from graham import graham_scan
 from mbc import mbc
 from quick_hull import quick_hull
 
-#random.seed(1337_420)
+random.seed(1337_420)
 
 while True:
     print("="*100)
-    points = {util.gen_point(-100, 100) for i in range(100)}
+    points = {util.gen_point(-100, 100) for i in range(5)}
     print("Points:", sorted(points))
 
     # Sanity check