Added resetGame for resetting whole game

src/main/java/Game/Chess.java

@@ -21,11 +21,7 @@ public class Chess extends Game {
     }
 
     private void init() {
-        chessBoard = new ChessBoard();
-        currentTeam = ChessFigure.Team.WHITE;
-        destroyedWhiteFigures = new ArrayList<>();
-        destroyedBlackFigures = new ArrayList<>();
-        outputBuffer.addAll(chessBoard.getOutputBoard());
+        resetGame();
     }
 
     @Override
@@ -33,6 +29,19 @@ public class Chess extends Game {
 
     }
 
+    private ArrayList<String> getHeader() {
+        ArrayList<String> header = new ArrayList<>();
+
+        header.add("Welcome to the good old game Chess!");
+        header.add("First select one cell like: 'e7', than confirm it with an enter.");
+        header.add("After that, select a second cell and also confirm it with an enter.");
+        header.add("The Goal is to defeat the other teams King(K).");
+        header.add("");
+        header.add("It's your Turn " + currentTeam.name().toLowerCase() + ".");
+
+        return header;
+    }
+
     //int[0] = x, int[1] = y;
     public int[] convertInput(String input) {
         int[] temp = new int[2];
@@ -149,6 +158,17 @@ public class Chess extends Game {
         return result;
     }
 
+    public void resetGame() {
+        chessBoard = new ChessBoard();
+        firstTurn = null;
+        currentTeam = ChessFigure.Team.WHITE;
+        destroyedWhiteFigures = new ArrayList<>();
+        destroyedBlackFigures = new ArrayList<>();
+        outputBuffer.clear();
+        outputBuffer.addAll(getHeader());
+        outputBuffer.addAll(chessBoard.getOutputBoard());
+    }
+
     public ChessBoard getChessBoard() {
         return this.chessBoard;
     }