and P-K4 is again a threat hard for white to meet.
This position shows, that to bring one’s opponent’s centre pawn away and to keep one’s own, does not under all circumstances mean the command of the centre, but that the opening up of files and diagonals for one’s pieces towards the centre is an important moment in the fight for positional advantage.
Considerations of this kind will help to improve our judgment in many of the various openings treated in the following pages.
We will class the openings in this way:
A. White 1. P-K4.
(a) Black 1. P-K4 (b) Black 1. Any other move
B. White 1. P-Q4.
(a) Black 1. P-Q4 (b) Black 1. Any other move
C. White 1. Any other move
We shall find that openings classed under C generally lead to positions treated under A and B.