+———————————————————-+
8 | #R | | | #Q | | #R | #K | |
|———————————————————-|
7 | #P | #P | #P | | | #P | #P | #P |
|———————————————————-|
6 | | | #Kt| #P | #B | #Kt| | |
|———————————————————-|
5 | | | #B | | #P | | ^B | |
|———————————————————-|
4 | | | ^B | | ^P | | | |
|———————————————————-|
3 | | | ^Kt| ^P | | ^Kt| | |
|———————————————————-|
2 | ^P | ^P | ^P | | | ^P | ^P | ^P |
|———————————————————-|
1 | ^R | | | ^Q | | ^R | ^K | |
+———————————————————-+
a b c d e f g h

DIAGRAM 43.

This can only be done by the exchange of a Pawn and as the only Pawn within easy reach is the Pawn e5 the files which are liable to be opened first are the d-file and the f-file. In the position of the Diagram it is not easy to find a way of opening either file mentioned without elaborate preparation. P-d4 cannot be played before the square d4 is three times controlled by White and if White tries to accomplish this by (8) Kt-e2, Black spoils White's plan by Bxc4 without being bothered by the threat Kt-d5 which existed as long as the Knight was posted on c3. If, on the other hand, White exchanges the Bishop first on e6 he helps Black's development by opening the f-file for his Rook. To avoid these alternatives White could withdraw the Bishop c4 to b3 and then play Kt-e2 followed by P-c3 and P-d4. But this maneuver involves two moves with pieces which are already developed and it is therefore preferable to place the Rook a1, who has to be developed, right away in the Queen's file and then to proceed as suggested above. In other words, White does probably best to play (8) Q-d2 and (9) Ra1-d1.

Black, in the meantime, will of course, also aim at the development of his Rooks. In the position of the Diagram it is even less troublesome for him than for White to prepare the opening of the d-file, as there is no objection to his playing immediately Kt-e7 with P-c6 and P-d5. The only reason which might deter Black from playing Kt-e7 is the fear that White might answer Bxf6 forcing Black to retake with the Pawn g7 and thereby tearing a hole in the protecting chain of Pawns around the King. However, as will be explained in the discussion of the middle game, this maneuver need not be feared.

+———————————————————-+
8 | | | | | | | | |
|———————————————————-|
7 | #P | #P | #P | | | #P | #P | #P |
|———————————————————-|
6 | | | | #P | | | | |
|———————————————————-|
5 | | | | | | | | |
|———————————————————-|
4 | | | | | ^P | | | |
|———————————————————-|
3 | | | | | | | | |
|———————————————————-|
2 | ^P | ^P | ^P | | | ^P | ^P | ^P |
|———————————————————-|
1 | | | | | | | | |
———————————————————-
a b c d e f g h

DIAGRAM 44.

The advance of the d-Pawn, besides the possibility of opening the d-file for the Rooks, has another very important purpose. It invites, and often compels the opponent to take the Pawn with his e-Pawn thereby losing control of "the center." What is meant by center in King's Pawn openings will be understood from the analysis of the Diagram 44 in which only the Pawn skeleton of a King's Pawn game is given and in which it is assumed that Black has exchanged the Pawn e5 for the Pawn d4. This Pawn formation offers an advantage to White because the Pawn e4, White's center- Pawn, controls the two squares d5 and f5 while the two corresponding squares in White's camp, that is d4 and f4, are not in the hands of Black and could be occupied by White men. It is evident that it must be advantageous to have pieces placed in the center of the board as there they have naturally more mobility than towards the edge of the board where part of their radius of action is cut off. A Knight, for instance, placed on d4 will possibly have an opportunity later on to go to f5 from where he helps an attack on g7. The square f4 may be useful for the Queen in an attempt to reach the King's wing speedily, thus accumulating on that part of the board superior forces. These and other advantages connected with the control of the center will be more readily understood after the discussion of the middle game maneuvers of which the center squares form the basis. It is necessary, however, to touch upon this matter at this time, as in many openings the player is confronted after the very first moves with questions in which the maintenance of the center-Pawn is the point at issue.

Following are a few examples:

Supposing White, after (1) P-e4, P-e5, plays (2) P-d4. Then Black is immediately threatened with the loss of his center-Pawn, which he cannot defend with P-d6 as after (3) Pxe5, Pxe5 White would exchange Queens and thereby deprive Black of the possibility of bringing his Rooks quickly into cooperation through castling.

(2) …, Kt-c6 is out of question too; not on account of (3) P- d5, which merely helps Black in getting his Knight over to the King's wing via e7 and allows him to maintain his center-Pawn, but on account of (3) Pxe5, Ktxe5; (4) Pf4, which secures the control of the center for White and does not leave Black a chance to advance his Queen's Pawn to d5 with the view of depriving White of his center-Pawn too.