diff --git a/Map.py b/Map.py
index cdd1901..1f11d9f 100644
--- a/Map.py
+++ b/Map.py
@@ -1,4 +1,7 @@
 
+import sys
+import random
+
 # odd-numbered rows are right-shifted by half a tile width
 class Map(object):
     def __init__(self):
@@ -48,3 +51,24 @@ class Map(object):
 
     def number(self):
         self._finalize()
+        red_possibilities = dict(zip(self._list, self._list))
+        to_number = dict(zip(self._list, self._list))
+        if len(red_possibilities) != 19:
+            sys.stderr('Map.number() only supports maps of 19 tiles!')
+            return
+        for red in [6, 6, 8, 8]:
+            rp = red_possibilities.keys()
+            random.shuffle(rp)
+            tile = rp[0]
+            tile.roll_val = red
+            del to_number[tile]
+            del red_possibilities[tile]
+            for t in self._neighbors[tile]:
+                del red_possibilities[tile]
+        tiles = to_number.keys()
+        random.shuffle(tiles)
+        zipped = zip(tiles, [2, 3, 3, 4, 4, 5, 5, 9, 9, 10, 10, 11, 11, 12])
+        def assign_roll_val(tr):
+            tile, rv = tr
+            tile.roll_val = rv
+        map(assign_roll_val, zipped)