QKt

Place the remaining eight White pieces thus: K at KB 4th, Q at QKt 6th, R at Q 6th, R at KKt 7th, B at Q 5th, B at KR 8th, Kt at QR 5th, and Kt at QB 5th.

Finally Black's QKt is unfavourably placed, obstructing as it does the QBP and preventing its falling into line with its fellows.

The QKt can be developed in this way: Kt-Q2- B1-Kt3 or K3.

Black can only maintain his centre pawn if he can prevent his QKt from being exchanged.

To play P-QKt3 before castling is very dangerous, because Black can play PxQP and pin the White QKt with B-Kt5, forcing B-Q2, when B-Kt2 was the move intended, e.g.