diff -r 93d6c51154a7 -r f1d7de36b01e src/de/uapcore/sudoku/Field.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/de/uapcore/sudoku/Field.java	Sat Jan 26 15:48:59 2013 +0100
@@ -0,0 +1,70 @@
+package de.uapcore.sudoku;
+
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.GridBagConstraints;
+import java.awt.GridBagLayout;
+import java.awt.Insets;
+import java.awt.image.BufferedImage;
+import javax.swing.JPanel;
+
+/**
+ *
+ * @author mike
+ */
+public class Field extends JPanel {
+    private SudokuTextField[][] cells;
+    
+    public Field() {
+        setBackground(Color.WHITE);
+        
+        setLayout(new GridBagLayout());
+        GridBagConstraints c = new GridBagConstraints();
+        c.insets = new Insets(5, 5, 5, 5);
+        
+        cells = new SudokuTextField[9][9];
+        for (int x = 0 ; x < 9 ; x++) {
+            for (int y = 0 ; y < 9 ; y++) {
+                cells[x][y] = new SudokuTextField();
+                c.gridx = x;
+                c.gridy = y;
+                add(cells[x][y], c);
+            }
+        }
+    }
+
+    @Override
+    public void paint(Graphics graphics) {
+        super.paint(graphics);
+        final int w = getWidth();
+        final int h = getHeight();
+        final int cw = w / 9;
+        final int ch = h / 9;
+        
+        BufferedImage img = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
+        Graphics2D g = img.createGraphics();
+        g.setBackground(Color.WHITE);
+        g.clearRect(0, 0, w, h);
+        
+        g.setColor(Color.BLACK);
+        g.drawRect(1, 1, w-2, h-2);
+        g.drawRect(2, 2, w-4, h-4);
+        for (int x = cw ; x < w ; x += cw) {
+            for (int y = ch ; y < h ; y += ch) {
+                g.drawLine(x, 2, x, h-2);
+                g.drawLine(2, y, w-2, y);
+                if ((x / cw) % 3 == 0) {
+                    g.drawLine(x+1, 2, x+1, h-2);
+                }
+                if ((y / ch) % 3 == 0) {
+                    g.drawLine(2, y+1, w-2, y+1);
+                }
+            }
+        }
+        
+        graphics.drawImage(img, 0, 0, this);
+    }
+    
+    
+}