---------------------------------------
A B C D E F G H

Diag. 13

the exchange to the good, for the Rook has no file which could be
used to break into the Black camp.

In Diagram 14, the numerical equality of forces will not save
Black, because bad development reduces the mobility of his pieces
to such an extent that he has no resources with which he can
parry the impending attack.

---------------------------------------
8 | | | #K | #R | | #B | | #R |
|---------------------------------------|
7 | | #B | | | #Q | #P | #P | #P |
|---------------------------------------|
6 | #P | #P | | #P | | | #Kt| |
|---------------------------------------|
5 | | | #P | ^P | #P | | | |
|---------------------------------------|
4 | | | ^P | | ^P | | | |
|---------------------------------------|
3 | | ^P | ^Kt| | ^B | ^Kt| ^P | |
|---------------------------------------|
2 | ^P | | | ^Q | | ^P | ^K | ^P |
|---------------------------------------|
1 | ^R | | | | ^R | | | |
---------------------------------------