I could be a fucking genius

Qwirkle/QwirkleClassLibrary/Board.cs

@@ -51,7 +51,6 @@ namespace QwirkleClassLibrary
                 if (cells[i].IsFree == true)
                 {
                     return cells[i].SetTile(tile);
-
                 }
             }
             return false;

Qwirkle/QwirkleClassLibrary/Game.cs

@@ -20,6 +20,9 @@ namespace QwirkleClassLibrary
 
         public ReadOnlyCollection<Score> ScoreList => scores.AsReadOnly();
         private readonly List<Score> scores = new();
+        
+        public ReadOnlyCollection<Cell> CellsUsed => cellUsed.AsReadOnly();
+        private readonly List<Cell> cellUsed = new();
 
         public Game()
         {
@@ -80,6 +83,16 @@ namespace QwirkleClassLibrary
             return true;
         }
         
+        public void AddCellUsed(Cell? c)
+        {
+            if (c != null) cellUsed.Add(c);
+        }
+        
+        public void EmptyCellUsed()
+        {
+            cellUsed.Clear();
+        }
+        
         public Player GetPlayingPlayer()
         {
             if(GetPlayingPlayerPosition() == -1)
@@ -163,7 +176,7 @@ namespace QwirkleClassLibrary
         
         
         /// <summary>
-        /// 
+        /// Allows a player to draw tiles from the bag as soon as he has less than 6 tiles
         /// </summary>
         /// <param name="player"></param>
         /// <returns></returns>
@@ -238,6 +251,30 @@ namespace QwirkleClassLibrary
             return true;
         }
 
+        public bool CheckTilesInLine(List<Cell> cells, Board b, int x, int y)
+        {
+            if(cells.Count < 2)
+            {
+                return true;
+            }
+            
+            var x1 = cells[0].GetX;
+            var y1 = cells[0].GetY;
+            var x2 = cells[1].GetX;
+            var y2 = cells[1].GetY;
+
+            if (x1 == x2)
+            {
+                return x == x1;
+            }
+            if (y1 == y2)
+            {
+                return y == y1;
+            }
+
+            return false;
+        }
+
         public bool IsMoveCorrect(Tile t, int x, int y, Board b)
         {
             if (!b.HasOccupiedCase())
@@ -274,8 +311,8 @@ namespace QwirkleClassLibrary
                 }
             }
 
-            return surroundingCells.Any(cell => cell?.GetTile != null);
+            return CheckTilesInLine(this.cellUsed, b, x, y) && surroundingCells.Any(cell => cell?.GetTile != null);
-        }
+        } 
 
             
         public bool IsGameOver()

Qwirkle/QwirkleClassLibrary/IRules.cs

@@ -16,6 +16,8 @@ namespace QwirkleClassLibrary
         
         bool CheckExtendedSurroundingCells(Tile tile, int x, int y, int dx, int dy, Board b);
         
+        bool CheckTilesInLine(List<Cell> cells, Board b, int x, int y);
+        
         bool IsGameOver();
     }
 }

Qwirkle/QwirkleConsoleApp/Program.cs

@@ -76,6 +76,7 @@ static void AddTile(Game game)
         if (game.PlaceTile(game.GetPlayingPlayer(), tile, x, y) == true)
         {
             WriteLine("ok ! your tile is placed");
+            game.AddCellUsed(game.GetBoard().GetCell(x, y));
         }
         else
         {
@@ -149,6 +150,7 @@ static void MenuSwitch(Game game)
                 enter = 3;
                 break;
             case 3:
+                game.EmptyCellUsed();
                 return;
         }
     }