Playing with the callback but still not having any luck.

lib/main.dart

@@ -60,7 +60,15 @@ class _GameBoardState extends State<GameBoard> {
       children: [
         // Player 1 Goal
         Column(
-          children: [Center(child: PlayerSpot(spot: 0, board: _BOARD))],
+          children: [
+            Center(
+              child: PlayerSpot(
+                spot: 0,
+                board: _BOARD,
+                boardUpdate: updateBoard,
+              ),
+            ),
+          ],
         ),
         // Center holes
         Column(
@@ -210,7 +218,15 @@ class _GameBoardState extends State<GameBoard> {
         ),
         // Player 2 Goal
         Column(
-          children: [Center(child: PlayerSpot(spot: 07, board: _BOARD))],
+          children: [
+            Center(
+              child: PlayerSpot(
+                spot: 07,
+                board: _BOARD,
+                boardUpdate: updateBoard,
+              ),
+            ),
+          ],
         ),
       ],
     );
@@ -222,7 +238,7 @@ class BoardSpot extends StatefulWidget {
   final List<int> board;
   final double w;
   final double h;
-  final ValueChanged<List<int>>? boardUpdate;
+  final ValueChanged<List<int>> boardUpdate;
 
   BoardSpot({
     super.key,
@@ -263,6 +279,7 @@ class _BoardSpotState extends State<BoardSpot> {
         BOARD = gameTurn(BOARD, _spot);
       }
     });
+    widget.boardUpdate(BOARD);
   }
 
   @override
@@ -283,8 +300,14 @@ class _BoardSpotState extends State<BoardSpot> {
 class PlayerSpot extends StatefulWidget {
   final int spot;
   final List<int> board;
+  final ValueChanged<List<int>> boardUpdate;
 
-  PlayerSpot({super.key, required this.board, required this.spot});
+  PlayerSpot({
+    super.key,
+    required this.board,
+    required this.spot,
+    required this.boardUpdate,
+  });
 
   @override
   State<PlayerSpot> createState() => _PlayerSpotState();
@@ -306,7 +329,7 @@ class _PlayerSpotState extends State<PlayerSpot> {
       h: 100,
       spot: _spot,
       board: widget.board,
-      boardUpdate: null,
+      boardUpdate: widget.boardUpdate,
     );
   }
 }