Touch a guard to make him active, and touch again to make him inactive.
The positions of the guards are predetermined by the Colonel-in-Chief and cannot be changed!
Guards look horizontally and vertically, but cannot see beyond obstacles.
No guard should be in view of another guard.
Affected squares will turn grey if any guards can see each other.
All of the squares, except for those containing obstacles, need to be under surveillance.
Keep as cool as a Coldstream Guard and the capital will be covered!
Answer for 'Coldstream Conundrum 21'
The answer is as follows.