part 1 done+added methods in Piece+Board

src/backend/Board.java

@@ -81,6 +81,7 @@ public class Board {
                 board[y][x] = null; // Remove the piece
             }
         }
+        this.turnNumber=0;
         System.out.println("Board cleaned. All pieces removed.");
 	}
 
@@ -123,49 +124,56 @@ public class Board {
 
 	public void userTouch(int x, int y) {
 		//TODO
-		// First Touch: No position is selected, and a piece is at the position x,y
-		  if (this.selectedPosition==null && getBoardChar(x,y)!='.') {
-			  // Select the position at x, y and store it as an array
-		      this.selectedPosition[0] = x;
-		      this.selectedPosition[1] = y;
-		      
+		// Case 1: No position is selected
+		  if (selectedPosition==null) { 
+			  Piece clickedPiece = board[y][x];
+			  // Check if there is a piece at clicked position and it belongs to current player
+			  if (clickedPiece!=null && clickedPiece.isWhite()==turnWhite){
+				  // Select this position 
+				  selectedPosition = new int[] {x,y};
+			  }
 		  } 
 		  
-		  // Second Touch: A piece is already selected
-		  else if (this.isSelected(x,y)){
-			// If the selected position is clicked again, deselect it
-		    this.selectedPosition=null;
+		  // Case 2: A position is already selected
+		  else{
+			  int selectedX = selectedPosition[0];
+		      int selectedY = selectedPosition[1];
+			
+		      // If the selected position is clicked again, deselect it
+		      if(selectedX == x && selectedY == y) {
+		            selectedPosition = null;
+		        }
+		      
+		      // If a piece is selected and the user clicks a new position
+		      else {
+		    	  movePiece(selectedX,selectedY,x,y);
+		    	  // Update turn
+			      this.turnNumber++;
+			      this.turnWhite=!this.turnWhite; 
+			    	
+			      // Deselect the position after moving
+			      this.selectedPosition = null;
+		      }
 		    } 
 		      
-		  // If a piece is selected and the user clicks a new position
-		  else if (this.selectedPosition!=null){
-			  // Move the piece from the selected position to x, y
-			  int fromX = this.selectedPosition[0];
-		      int fromY = this.selectedPosition[1];
-
-		      // Move the piece from (fromX, fromY) to (x, y)
-		      this.movePiece(fromX, fromY, x, y);
-		      
-		      // Update turn
-		      this.turnNumber++;
-		      this.turnWhite=!this.turnWhite; 
-		    	
-		      // Deselect the position after moving
-		      this.selectedPosition = null;
-		    }
-	}
+	 }
 	
 	public void movePiece(int fromX, int fromY, int toX, int toY) {
-		    // Move the piece on the board
-		    this.board[toX][toY] = this.board[fromX][fromY]; // Place piece at the new position
-		    this.board[fromX][fromY] = null; // Clear the old position
-	}
+		// Get the piece at the source position
+	    Piece piece = board[fromY][fromX];
 	    
-	 private char getBoardChar(int x, int y) {
-	        int index = y * 8 + x;
-	        return boardString.charAt(index);
+	    if (piece != null) {
+	        // Update the piece's internal position
+	        piece.setX(toX);
+	        piece.setY(toY);
+	        
+	        // Move the piece on the board
+	        board[toY][toX] = piece;      // Place piece at the new position
+	        board[fromY][fromX] = null;   // Clear the old position
 	    }
 		   
+	}
+
 	public boolean isSelected(int x, int y) {
 		return this.selectedPosition!=null && this.selectedPosition[0] == x && this.selectedPosition[1] == y;
 	}

src/backend/Piece.java

@@ -22,6 +22,14 @@ public class Piece {
 		return color;
 	}
 	
+	public void setX(int x) {
+		this.X=x;
+	}
+	
+	public void setY(int y) {
+		this.Y=y;
+	}
+	
 	// constructor
 	public Piece (boolean colorP, PieceType typeP, int xP, int yP) {
 		this.color=colorP;