started on b

src/uebung09/chess/Board.java

@@ -4,10 +4,14 @@ import java.util.ArrayList;
 import java.util.List;
 import uebung09.iterator.Array2dIterator;
 
-public class Board extends Array2dIterator<Piece> {
+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");