diff --git a/h2/mbc.py b/h2/mbc.py
new file mode 100644
index 0000000..d00a1de
--- /dev/null
+++ b/h2/mbc.py
@@ -0,0 +1,21 @@
+import statistics
+from collections import namedtuple
+from typing import List, Set
+
+Point = namedtuple('Point', 'x y')
+
+
+def mbc_ch(points: Set[Point]):
+    # Find the point with median x-coordinate, and partition the points on this point
+    pm = statistics.median_high(points)
+
+    pl = {point
+          for point in points
+          if point.x < pm.x}
+
+    pr = {point
+          for point in points
+          if point.x >= pm.x}
+
+    # Find the bridge over the vertical line in pm
+    
\ No newline at end of file
diff --git a/h2/sidedness.py b/h2/sidedness.py
index 6943214..40ddc25 100644
--- a/h2/sidedness.py
+++ b/h2/sidedness.py
@@ -55,7 +55,7 @@ def graham_scan(points):
     # A funky issue where both a and b become negative in the sidedness test causes us to have to use
     # Side.ABOVE for both tests, regardless of UH or LH.
 
-    sorted_points = sorted(points, key=lambda p: p.x)
+    sorted_points = sorted(points)
 
     UH = sorted_points[:2]
     #del sorted_points[0]