Black has only the choice between returning with the Bishop to f8 or capturing on e3.  Naturally, he chooses the latter move as he cannot improve his position by a retrogressive play which still further retards his development.  After Bxe3,(3) Qxg7, Bxf2+;(4) Kxf2, R-c2+; (5) K-g1, R-f8; there is not much hope for Black to bring his King’s Rook in contact with the other pieces, while White may be able to double his Rooks in the Queen’s file, which would decide the victory as Black has no possibility to counter the threat R-d8+ in the long run.  White played (6) Kt-e5 with the intention to sacrifice the Knight on f7 in case Black should move his Bishop.  Rxf7 would then be followed by Q-g8+ and Qxb8 or Qxe6 mate.  Therefore, Black had to withdraw his Rook with (6) ..., R-c7 and White simply played (7) R-d2 threatening to double.  Black prevented this by B-a4, at the same time threatening P-f6, but after(8) Kt-g4, R-c2; (9) R-d4, Q-c8; (10) Kt-f6+, K-e7; (11) Q-g5 he resigned as now the square c1 is sufficiently protected while the threat Kt-g8++ cannot be parried.

The foregoing examples show that generally several moves are necessary in the middle game for Knights and Rooks to reach positions favorable for an active part in the attack.  With the Bishops it is different.  They can usually be developed on their first move to the square on which they are needed in the middle game for either attack or defense.

In King’s Pawn openings as well as in Queen’s Pawn openings White’s Queen’s Bishop is, in the majority of cases, used for pinning Black’s King’s Knight on g5 and Black’s King’s Bishop is placed on e7 to relieve the pin.  The pinning of the King’s Knight, however, is not advisable in positions in which the opponent has the option of castling to the Queen’s side.  After (1) P-e4, P-e5; (2) Kt-f3, Kt-c6; (3) B-c4, Kt-f6; (4) Kt-c3, B-c5; (5) P-d3, P-d6; for instance White should wait with B-g5 until Black has castled on the King’s side.  If he plays (6) B-g5, Black will answer B-e6; (7) o-o, Q-d7; and now White would only hurt his own game by exchanging on f6 as the open g-file is bound to aid Black, who will castle on the Queen’s side, in an attack on the King’s side.

In Queen’s Pawn openings the move B-g5 is always good as Black cannot very well castle on the Queen’s side on account of the open c-file in which White would soon obtain an overwhelming attack.  Another good square for the Queen’s Bishop is in Queen’s Pawn openings b2 from where the Bishop supports the advance of the King’s Knight to e5.  In this case the Queen’s Knight should be developed to d2 instead of c3 so as not to obstruct the line of the Bishop.  The same holds good for the development of Black’s Queen’s Bishop.