[Illustration:
+---+---+---+---+---+---+---+---+
|///| | | | | | |///|
+---+---+---+---+---+---+---+---+
| |///| | | | |///| * |
+---+---+---+---+---+---+---+---+
| | |///| | |///| | |
+---+---+---+---+---+---+---+---+
| | | |///|///| | | |
+---+---+---+---+---+---+---+---+
| | | |///|///| | | |
+---+---+---+---+---+---+---+---+
| | |///| | |///| | |
+---+---+---+---+---+---+---+---+
| |///| | | | |///| |
+---+---+---+---+---+---+---+---+
|///| | | | | | |///|
+---+---+---+---+---+---+---+---+
]
The puzzle in this case is to place eight stars in the diagram so that
no star shall be in line with another star horizontally, vertically, or
diagonally. One star is already placed, and that must not be moved, so
there are only seven for the reader now to place. But you must not place
a star on any one of the shaded squares. There is only one way of
solving this little puzzle.