3 | | ^B | ^P | | |^Kt | | |
|---------------------------------------|
2 | | ^P | | | | ^P | ^P | ^P |
|---------------------------------------|
1 | | | | | ^R | | ^K | |
---------------------------------------
A B C D E F G H

Diag. 6.

is, upset by one of the pieces involved being exchanged or
sacrificed. An example of this is found in Diagram 6; KtxP

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