diff --git a/src/com/score_the_pigs/app.clj b/src/com/score_the_pigs/app.clj
index 665ba24..5d83e9b 100644
--- a/src/com/score_the_pigs/app.clj
+++ b/src/com/score_the_pigs/app.clj
@@ -232,6 +232,9 @@ end"}
                           sql/format
                           (jdbc/execute-one! ds)
                           :total)]
+    ;; when we want to play again, we have to "archive" the current game by
+    ;; changing its game code to `${code}-${games-in-set}` and settings its
+    ;; game_set to `code`.
     (pp/pprint game)
     (println games-in-set))