init

src/schack/Board.java

@@ -21,7 +21,7 @@ public class Board extends JPanel implements MouseListener {
     private Point selectedPiece = new Point();
     private Color moveableColor = new Color(255, 191, 0);
     public boolean developerMode = false;
-    short turnCount = 0;
+    public static short turnCount = 0;
     boolean whitesTurn = true;
 
     public Board() throws IOException {

src/schack/Pawn.java

@@ -81,6 +81,14 @@ public class Pawn extends PieceKnownIfMoved {
 
     }
 
+    @Override
+    public void move(Piece[][] pieces, Point toMove) {
+        if (Math.abs(toMove.y - this.position.y) == 2) {
+            othersMayDoEnPassant = true;
+        }
+        super.move(pieces, toMove);
+    }
+
     @Override
     protected boolean addMovesIfCan(Point pos, ArrayList movable, Piece[][] pieces, boolean isSelected) {
         if (pos.x < 0 || pos.x > 7 || pos.y < 0 || pos.y > 7) {

src/schack/PieceKnownIfMoved.java

@@ -5,20 +5,19 @@ import java.io.IOException;
 
 public abstract class PieceKnownIfMoved extends Piece {
 
-    protected boolean moved = false;
-
     public PieceKnownIfMoved(boolean isWhite, Point startingPosition) throws IOException {
         super(isWhite, startingPosition);
+        lastTurnMoved = -1;
     }
 
     @Override
     public void move(Piece[][] pieces, Point toMove) {
         super.move(pieces, toMove);
-        moved = true;
+        lastTurnMoved++;
     }
 
     public boolean isMoved() {
-        return moved;
+        return lastTurnMoved > -1;
     }
 
 }