From e7933b56614eda1941811bb95e533fceb1eaf907 Mon Sep 17 00:00:00 2001
From: Dan Barber <github@danbarber.me>
Date: Thu, 8 Dec 2016 14:52:26 +0000
Subject: [PATCH] Fix problem with null selectedSquare

---
 app/components/chess-board-square.js | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/app/components/chess-board-square.js b/app/components/chess-board-square.js
index 3279f1b..25c254e 100644
--- a/app/components/chess-board-square.js
+++ b/app/components/chess-board-square.js
@@ -28,8 +28,13 @@ class ChessBoardSquare extends React.Component {
   isSelectedSquare() {
     var { store } = this.props;
 
-    return this.squareCoords().rank == store.getState().selectedSquare.rank
-      && this.squareCoords().file == store.getState().selectedSquare.file;
+    if (store.getState().selectedSquare == null) {
+      return false;
+    }
+    else {
+      return this.squareCoords().rank == store.getState().selectedSquare.rank
+        && this.squareCoords().file == store.getState().selectedSquare.file;
+    }
   }
 
   render() {