Preheat oven to 350 and grease a 9 x 13 cake pan.
Mix together dates, boiling water and soda, set aside.
Cream shortening with sugar and then add eggs.
Sift together flour and cocoa, blend all ingredients together and spread evenly in cake pan.
Top with walnuts and chocolate chips.
Bake for 30 to 40 minutes, until a toothpick comes out clean.
Allow to cool, then cut into 2 inch squares. Cake keeps well in closed container for 4 or 5 days, but also freezes well.