diff --git a/ipynb/WWW.ipynb b/ipynb/WWW.ipynb
index 04836cc..1839823 100644
--- a/ipynb/WWW.ipynb
+++ b/ipynb/WWW.ipynb
@@ -13,7 +13,7 @@
     "1. **Holistic**: I just feel that the Warriors have about a 1/3 chance of winning it all.\n",
     "2. **Game by Game**: I think the Warriors have an 75% chance of winning each game in the first round, then 65% for each game in the second round, but only 45% against the Rockets, then 55% if they make it to the finals. From that I'll calculate their overall chance.\n",
     "3. **Point by Point**: The Warriors have a per-game average point differential of +5.8; I'll compare that to the other teams and caclulate their overall chance.\n",
-    "4. **Play by Play**: Use [detailed statistics](https://www.basketball-reference.com/play-index/plus/shot_finder.cgi) to model the game shot-by-shot, or even pass-by-pass.\n",
+    "4. **Play by Play**: Use [detailed statistics](https://www.basketball-reference.com/play-index/plus/shot_finder.cgi) to [model](https://danvatterott.com/blog/2016/06/16/creating-videos-of-nba-action-with-sportsvu-data/) the game shot-by-shot, or even pass-by-pass. That's too complex for me.\n",
     "\n",
     "# Point by Point Model\n",
     "\n",
@@ -54,7 +54,7 @@
     {
      "data": {
       "text/plain": [
-       "0.61166"
+       "0.61119"
       ]
      },
      "execution_count": 2,
@@ -90,7 +90,7 @@
       "5 point differential =  68% win game\n",
       "6 point differential =  72% win game\n",
       "7 point differential =  75% win game\n",
-      "8 point differential =  77% win game\n",
+      "8 point differential =  78% win game\n",
       "9 point differential =  80% win game\n"
      ]
     }
@@ -146,13 +146,13 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "0 point differential =  50% win game =  50% win series\n",
+      "0 point differential =  50% win game =  49% win series\n",
       "1 point differential =  54% win game =  58% win series\n",
-      "2 point differential =  58% win game =  66% win series\n",
-      "3 point differential =  61% win game =  74% win series\n",
+      "2 point differential =  57% win game =  66% win series\n",
+      "3 point differential =  61% win game =  73% win series\n",
       "4 point differential =  65% win game =  80% win series\n",
       "5 point differential =  68% win game =  85% win series\n",
-      "6 point differential =  72% win game =  89% win series\n",
+      "6 point differential =  71% win game =  89% win series\n",
       "7 point differential =  75% win game =  93% win series\n",
       "8 point differential =  78% win game =  95% win series\n",
       "9 point differential =  80% win game =  97% win series\n"
@@ -328,9 +328,9 @@
      "output_type": "stream",
      "text": [
       "Rockets vs Wolves    89%; through here:  89%\n",
-      "Rockets vs Jazz      78%; through here:  70%\n",
+      "Rockets vs Jazz      78%; through here:  69%\n",
       "Rockets vs Warriors  69%; through here:  48%\n",
-      "Rockets vs Raptors   58%; through here:  28%\n"
+      "Rockets vs Raptors   57%; through here:  27%\n"
      ]
     }
    ],
@@ -352,7 +352,7 @@
      "output_type": "stream",
      "text": [
       "Warriors vs Spurs     73%; through here:  73%\n",
-      "Warriors vs Blazers   76%; through here:  55%\n",
+      "Warriors vs Blazers   74%; through here:  54%\n",
       "Warriors vs Rockets   31%; through here:  17%\n",
       "Warriors vs Raptors   38%; through here:   6%\n"
      ]
@@ -405,7 +405,7 @@
     "\n",
     "def series_results(p, W=0, L=0):\n",
     "    \"\"\"Return {(win, loss): probability} for all possible outcomes of the series.\"\"\"\n",
-    "    return MCounter({(W, L): 1} if W == 4 or  L == 4 else\n",
+    "    return MCounter([(W, L)] if W == 4 or  L == 4 else\n",
     "                    (p       * series_results(p, W + 1, L) + \n",
     "                     (1 - p) * series_results(p, W, L + 1)))\n",
     "            \n",
@@ -432,7 +432,7 @@
    "source": [
     "So we see that our 60% team has a 13% chance of sweeping, and 13+21+21 = 55% chance of winning in 6 games or less.\n",
     "\n",
-    "**Note:** I think `collections.Counter` should support multiplication. If `C` is a `Counter`, then shouldn't `C + C` be the same as `2 * C`?"
+    "**Note:** I think `Counter` should support multiplication. If `C` is a `Counter`, then shouldn't `C + C` be the same as `2 * C`?"
    ]
   },
   {
@@ -936,16 +936,16 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 29,
+   "execution_count": 28,
    "metadata": {},
    "outputs": [
     {
      "data": {
       "text/plain": [
-       "0.9671243623571251"
+       "0.967480202675441"
       ]
      },
-     "execution_count": 29,
+     "execution_count": 28,
      "metadata": {},
      "output_type": "execute_result"
     }