(7) B-d3 Q-a5
          (8) Q-b3

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

Diagram 70.

White has to be very careful on account of the various exchanges possible in the center.  Black threatens for instance to exchange first on d4 and then to play Kt-e4 so that the Bishop g5 is attacked by the Queen in case White takes the Knight with his Bishop, allowing the Pawn d5 to clear the fifth rank.  Or he might play Kt-e4 first and then exchange on d4.  Considering that all these threats are based on the fact that the Knight c3 is pinned as long as White has not yet castled it lies near for White to try (8) o-o.  It is true that Black can then win a Pawn by taking twice on c3; however, in doing so he would retard his development and White is bound to obtain a strong attack by getting all of his pieces quickly into action, while Black’s Queen is separated from the rest of her troops.

White’s eighth move, Q-b3, has several drawbacks.  First of all Black could play P-b5! winning a piece for three Pawns as White cannot do better than play (9) Pxb5 or Pxd5 allowing P-C4.  Secondly, Black can make the combination indicated above which tends to open the fifth rank so that the Queen attacks g5.  The same combination would be possible if White played (8) Q-C2.

          (8) ...  Kt-e4
          (9) o-o

Offering the Pawn sacrifice Ktxc3; (10) Pxc3, Bxc3 with the view to attacking by (11) R-c1, etc., as previously indicated.  Black prefers to direct his attack against g5.

          (9) ...  Ktxg5
          (10) Ktxg5 Pxd4
          (11) Kt-b5

(11) Pxd4 would lose a piece on account of Pxc4, attacking the Bishop on d3 and the Knight on g5.  Black could now win a Pawn by taking on d3, but this would be very dangerous as it would open the f-file for White’s Rook.

          (11) ...  Kt-c5