started on b

src/uebung09/chess/Board.java

@@ -8,6 +8,10 @@ public class Board extends Array2dIterator<Piece> {
     private final Piece[][] field = new Piece[8][8];
     private final List<Piece> pieces = new ArrayList<>();
 
+    Board(){
+        
+    }
+
     void add(Piece piece) {
         if (piece.getBoard() != this)
             throw new IllegalArgumentException("wrong board");

src/uebung09/chess/ChessApp.java

@@ -12,6 +12,7 @@ public class ChessApp {
     private static final String BLACK_QUEEN = "Q";
     private static final String WHITE_KNIGHT = "n";
     private static final String BLACK_KNIGHT = "N";
+    private static final String ITERATOR = "i";
 
     private final Scanner scanner;
     private final Board board;