diff --git a/Qwirkle/QwirkleClassLibrary/Games/Game.cs b/Qwirkle/QwirkleClassLibrary/Games/Game.cs
index 02c974a..2c32d3b 100644
--- a/Qwirkle/QwirkleClassLibrary/Games/Game.cs
+++ b/Qwirkle/QwirkleClassLibrary/Games/Game.cs
@@ -317,6 +317,11 @@ namespace QwirkleClassLibrary.Games
         /// <returns>bool</returns>
         public bool PlaceTile(Player player, Tile tile, int x, int y)
         {
+            if(!TileInbag(player, tile))
+            {
+                OnPlaceTile(new PlaceTileNotifiedEventArgs(tile, "you cant play"));
+                return false;
+            }
             if (!IsMoveCorrect(tile, x, y, board!)) return false;
             if (board!.AddTileInCell(x, y, tile))
             {
@@ -328,6 +333,18 @@ namespace QwirkleClassLibrary.Games
             return false;
         }
 
+        public bool TileInbag(Player player, Tile tile)
+        {
+            for (int i = 0; i < player.Tiles.Count; i++)
+            {
+                Tile? t = player.Tiles[i];
+                if (Object.ReferenceEquals(t, tile)) return true;
+
+            }
+            return false;
+
+        }
+
 
         /// <summary>
         /// Allows a player to draw tiles from the bag as soon as he has less than 6 tiles
@@ -494,9 +511,9 @@ namespace QwirkleClassLibrary.Games
                 return true;
             }
 
-            if (b.GetCell(x, y)!.Tile == null)
+            if (b.GetCell(x, y)!.Tile != null)
             {
-                OnPlaceTile(new PlaceTileNotifiedEventArgs(t, ": Cell already used !"));
+                OnPlaceTile(new PlaceTileNotifiedEventArgs(t, " : Cell already used !"));
             }
 
             var surroundingCells = new List<Cell?>
diff --git a/Qwirkle/QwirkleClassLibrary/Players/Player.cs b/Qwirkle/QwirkleClassLibrary/Players/Player.cs
index e9c4997..7533147 100644
--- a/Qwirkle/QwirkleClassLibrary/Players/Player.cs
+++ b/Qwirkle/QwirkleClassLibrary/Players/Player.cs
@@ -6,14 +6,23 @@ using System.Linq;
 using System.Runtime.CompilerServices;
 using System.Text;
 using System.Threading.Tasks;
+using QwirkleClassLibrary.Boards;
 using QwirkleClassLibrary.Tiles;
 
 namespace QwirkleClassLibrary.Players
 {
     public class Player : INotifyPropertyChanged
     {
-        public ReadOnlyCollection<Tile> Tiles => playerTiles.AsReadOnly();
-        private readonly List<Tile> playerTiles = new();
+        private ObservableCollection<Tile> playerTiles = new ObservableCollection<Tile>();
+        public ObservableCollection<Tile> Tiles
+        {
+            get { return playerTiles; }
+            set
+            {
+                playerTiles = value;
+                OnPropertyChanged(nameof(Tiles));
+            }
+        }
 
         public event PropertyChangedEventHandler? PropertyChanged;
         void OnPropertyChanged([CallerMemberName] string? propertyName = null)
@@ -45,7 +54,7 @@ namespace QwirkleClassLibrary.Players
         public void AddTileToPlayer(Tile tile)
         {
             playerTiles.Add(tile);
-            OnPropertyChanged();
+            OnPropertyChanged(nameof(Tiles));
         }
 
         /// <summary>
@@ -57,7 +66,7 @@ namespace QwirkleClassLibrary.Players
         {
             if (playerTiles.Remove(tile))
             {
-                OnPropertyChanged();
+                OnPropertyChanged(nameof(Tiles));
                 return true;
             }
             return false;
diff --git a/Qwirkle/QwirkleViews/Pages/GameBoard.xaml.cs b/Qwirkle/QwirkleViews/Pages/GameBoard.xaml.cs
index 7e2f923..894b907 100644
--- a/Qwirkle/QwirkleViews/Pages/GameBoard.xaml.cs
+++ b/Qwirkle/QwirkleViews/Pages/GameBoard.xaml.cs
@@ -51,6 +51,6 @@ public partial class Gameboard : ContentPage
 
     private void Game_PlaceTileNotified(object? sender, PlaceTileNotifiedEventArgs args)
     {
-        DisplayAlert("Tile place notified", args.Reason, "<3");
+        DisplayAlert("Tile place notified", args.Tile.ToString() + args.Reason, "<3");
     }
 }
\ No newline at end of file
diff --git a/Qwirkle/QwirkleViews/Pages/SetPlayers.xaml.cs b/Qwirkle/QwirkleViews/Pages/SetPlayers.xaml.cs
index 5a054e8..2bf0b20 100644
--- a/Qwirkle/QwirkleViews/Pages/SetPlayers.xaml.cs
+++ b/Qwirkle/QwirkleViews/Pages/SetPlayers.xaml.cs
@@ -46,7 +46,7 @@ public partial class SetPlayers : ContentPage
     {
         game.PlayerAddNotified += Game_PlayerAddNotified;
 
-        List<string> playerstag = [Entry1.TextIn!, Entry2.TextIn!, Entry3.TextIn!, Entry3.TextIn!];
+        List<string> playerstag = [Entry1.TextIn!, Entry2.TextIn!, Entry3.TextIn!, Entry4.TextIn!];
 
         if (game.AddPlayerInGame(playerstag))
         {