diff --git a/snippets/elo.md b/snippets/elo.md
index 1c52db62b..991b74019 100644
--- a/snippets/elo.md
+++ b/snippets/elo.md
@@ -5,14 +5,14 @@ of two pre-ratings and returns an array containing two post-ratings.
 The winner's rating is the first element of the array.
 
 Use `Math.pow()` and math operators to compute the expected score (chance of winning) of each opponent
-and compute the change in rating for each. Omit the second argument to use the default K-factor of
+and compute the new rating for each. Omit the second argument to use the default K-factor of
 32, or supply a custom K-factor value.
 
 ```js
 const elo = ([a, b], kFactor = 32) => {
   const expectedScore = (self, opponent) => 1 / (1 + Math.pow(10, (opponent - self) / 400));
-  const [eA, eB] = [expectedScore(a, b), expectedScore(b, a)];
-  const newRating = (rating, index) => rating + kFactor * (index - (index ? eA : eB));
+  const newRating = (rating, i) =>
+    rating + kFactor * (i - (i ? expectedScore(a, b) : expectedScore(b, a)));
   return [newRating(a, 1), newRating(b, 0)];
 };
 ```