| 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 it with Kt-QB3, as White would exchange pawns and then Queens. Black would thus forfeit his chance of castling and lose much time in bringing the King into safety and the Rooks into play. P- KB3, of course, is impossible, as it is not a developing move, and moreover blocks the natural development of the King’s Knight. Protecting the pawn with the Queen would also block other pieces, and QKt-Q2 cannot be good, as it blocks the Queen’s Bishop.
Since it seems impossible to protect the King’s Pawn, the only alternative would be to exchange it; indeed it is on the whole the best course, although it allows a White piece to take up a dominating position in the centre. Wishing to avoid this, Black plays
| 3. … | B-Kt5 |
and, by pinning the opponent’s Knight, indirectly protects the King’s Pawn. This manœuvre is, however, ill-advised, as Black is forced to exchange the Bishop for the Knight. The Bishop will have moved twice, the Knight only once, therefore White will have gained a move for his development.
| 4. PxP | BxKt |