Then, as in the present position, retribution comes swiftly.

8. ... P-Q4

White should have considered this move. It was obvious, since the
opening of the K file for the Rook is most dangerous, for the
White King.

9. BxP KtxB

Black could have played QxB at once.

10. QxKt QxQ
11. PxQ B-Kt5 double ch
12. K-Q1 R-K8 mate

A further example in which the loss of moves occurs, though not
so glaringly, is the following famous game, which Morphy played
against the Duke Karl of Brunswick and Count Isouard in the Royal
box at the Paris opera-house.

1. P-K4 P-K4
2. Kt-KB3 P-Q3

According to the principles set out above, Kt-QB3 would have been
better, since the text move shuts out the King's Bishop.

3. P-Q4

Now the King's Pawn is attacked twice. It would be bad to support