diff --git a/README.md b/README.md
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+++ b/README.md
@@ -1,5 +1,7 @@
 # candyland
 
+Simulation of Candyland.
+
 ```bash
 cmake -S . -B build
 cmake --build build
@@ -104,4 +106,18 @@ shortest game:     6 draws
 81: 1
 ```
 
+## Discussion
+
+Our version of Candyland seems to have a key difference [rules I can find posted online](https://www.wikihow.com/Play-Candy-Land):
+
+* Two players cannot occupy the same space. If you land on a space occupied by another player, move your piece to the next space of the same color.
+
+This rule introduces a problem: what if there is no available space of the same color?
+I decided that under such circumstances, the player does not move at all.
+
+Furthermore, it appears there's some variety in board layout.
+Here's ours, featuring two shortcuts and a split path:
+
+![](board.jpg)
+
 ![](histo.png)
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