diff --git a/source/Trek-12/Models/Cell.cs b/source/Trek-12/Models/Cell.cs
index 8369dc8..66e5f4f 100644
--- a/source/Trek-12/Models/Cell.cs
+++ b/source/Trek-12/Models/Cell.cs
@@ -2,15 +2,50 @@
 
 public class Cell
 {
-    private Position pos;
-    private int value;
-    private string type;
-    private string background;
-    
+    public Position Pos { get; private set; }
+
+    private int? value;
+    public int? Value {
+        get
+        {
+            return value;
+        }
+        set
+        {
+            if (value < 0)
+            {
+                throw new Exception("La valeur doit être supérieure à 0");
+            }
+            this.value = value;
+        }
+    }
+
+    private string Type { get; set; }
+
+    private string? Background { get; set; }
+
     public Cell(int x, int y)
     {
-        pos = new Position(x, y);
+        Pos = new Position(x, y);
     }
 
-    public string GetCellType() => type;
+    public string GetCellType() => Type;
+
+
+    // Redefinition de l'opérateur == pour comparer deux cellules
+    public override bool Equals(object? obj)
+    {
+        if (obj == null || GetType() != obj.GetType())
+        {
+            return false;
+        }
+        Cell c = (Cell)obj;
+        return (Pos.X == c.Pos.X) && (Pos.Y == c.Pos.Y);
+    }
+
+    // Redefinition de la méthode de Hash pour l'opérateur ==
+    public override int GetHashCode()
+    {
+        return Pos.X * Pos.Y;
+    } 
 }
\ No newline at end of file