diff --git a/source/Trek-12/Models/Game/OperationCell.cs b/source/Trek-12/Models/Game/OperationCell.cs
index d8ac6da..c17791d 100644
--- a/source/Trek-12/Models/Game/OperationCell.cs
+++ b/source/Trek-12/Models/Game/OperationCell.cs
@@ -1,3 +1,5 @@
+using System.ComponentModel;
+
 namespace Models.Game
 {
     /// <summary>
@@ -5,10 +7,20 @@ namespace Models.Game
     /// </summary>
     public class OperationCell : Position
     {
+
+        private bool isChecked;
         /// <summary>
         /// It tells if the operation is checked or not in the operation grid of  the game.
         /// </summary>
-        public bool IsChecked { get; private set; }
+        public bool IsChecked
+        {
+            get => isChecked;
+            private set
+            {
+                isChecked = value;
+                OnPropertyChanged(nameof(IsChecked));
+            }
+        }
 
         /// <summary>
         /// Constructor of the OperationCell class.
diff --git a/source/Trek-12/Models/Game/Position.cs b/source/Trek-12/Models/Game/Position.cs
index c1b75da..d34ece5 100644
--- a/source/Trek-12/Models/Game/Position.cs
+++ b/source/Trek-12/Models/Game/Position.cs
@@ -1,10 +1,13 @@
-namespace Models.Game
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+
+namespace Models.Game
 {
 
     /// <summary>
     /// The Position (x,y) of a cell in the game.
     /// </summary>
-    public class Position
+    public class Position : INotifyPropertyChanged
     {
         /// <summary>
         /// The X coordinate.
@@ -26,5 +29,19 @@
             X = x;
             Y = y;
         }
+
+        /// <summary>
+        /// Event raised when a property is changed to notify the view.
+        /// </summary>
+        public event PropertyChangedEventHandler PropertyChanged;
+
+        /// <summary>
+        /// Trigger the PropertyChanged event for a specific property.
+        /// </summary>
+        /// <param name="propertyName">Name of the property that changed.</param>
+        protected virtual void OnPropertyChanged(string propertyName)
+        {
+            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+        }
     }
 }
\ No newline at end of file