refactor

src/uebung09/chess/Board.java

@@ -9,7 +9,7 @@ import uebung09.iterator.Array2dIterator;
 
 public class Board implements Iterable<Piece>{
     private final Piece[][] field = new Piece[8][8];
-    //private final List<Piece> pieces = new ArrayList<>();
+    private final List<Piece> pieces = new ArrayList<>();
 
 
     void add(Piece piece) {
@@ -42,7 +42,7 @@ public class Board implements Iterable<Piece>{
     }
 
     public void check() {
-        for (Piece p1 : iterator()) {
+        for (Piece p1 : pieces) {
             System.out.println(p1.toString());
             for (Piece p2 : pieces)
                 if (p1 != p2)