Chess Fundamentals was first published thirteen years ago. Since then there have appeared at different times a number of articles dealing with the so-called Hypermodern Theory. Those who have read the articles may well have thought that something new, of vital importance, had been discovered. The fact is that the Hypermodern Theory is merely the application, during the opening stages generally, of the same old principles through the medium of somewhat new tactics. There has been no change in the fundamentals. The change has been only a change of form, and not always for the best at that.