diff -r 0c5a8b83182a -r 19d0484c1916 rt/vm/src/test/java/org/apidesign/vm4brwsr/Numbers.java
--- a/rt/vm/src/test/java/org/apidesign/vm4brwsr/Numbers.java	Sun May 11 23:06:45 2014 +0200
+++ b/rt/vm/src/test/java/org/apidesign/vm4brwsr/Numbers.java	Mon May 26 14:33:11 2014 +0200
@@ -107,4 +107,19 @@
     
     @JavaScriptBody(args = { "o" }, body = "return o.valueOf();")
     private static native boolean bvalueOf(Object o);
+    
+    public static int around(Object model, int x, int y) {
+        return minesAt(model, x - 1, y - 1)
+            + minesAt(model, x - 1, y)
+            + minesAt(model, x - 1, y + 1)
+            + minesAt(model, x, y - 1)
+            + minesAt(model, x, y + 1)
+            + minesAt(model, x + 1, y - 1)
+            + minesAt(model, x + 1, y)
+            + minesAt(model, x + 1, y + 1);
+    }
+
+    private static int minesAt(Object model, int x, int y) {
+        return x + y;
+    }    
 }