So sollte das Muster etwa aussehen
(Schnappschuss vom PC):

1 2 3 4 5 6 7 8 9
+---------+---------+---------+
1| . . . | . . . | . . . |
2| . . . | . . . | . . . |
3| . . . | . . . | . . . |
+---------+---------+---------+
4| . . . | / / / | . . . |
5| * * * | X X X | * * * |
6| . . . | / / / | . . . |
+---------+---------+---------+
7| . . . | . . . | . . . |
8| . . . | . . . | . . . |
9| . . . | . . . | . . . |
+---------+---------+---------+
1 2 3 4 5 6 7 8 9
+---------+---------+---------+
1| . . . | . . . | . . . |
2| / X / | / / / | / X / |
3| . . . | . . . | . . . |
+---------+---------+---------+
4| . . . | . . . | . . . |
5| X X X | / / / | / X / |
6| . . . | . . . | . . . |
+---------+---------+---------+
7| . . . | . . . | . . . |
8| X X X | / / / | X X X |
9| . . . | . . . | . . . |
+---------+---------+---------+
1 2 3 4 5 6 7 8 9
+---------+---------+---------+
1| X / / | . . . | . . . |
2| / / / | . . . | . . . |
3| / / X | . . . | . . . |
+---------+---------+---------+
4| . . . | / X / | . . . |
5| . . . | / / / | . . . |
6| . . . | X X X | . . . |
+---------+---------+---------+
7| . . . | . . . | X X X |
8| . . . | . . . | / / / |
9| . . . | . . . | X X X |
+---------+---------+---------+
1 2 3 4 5 6 7 8 9
+---------+---------+---------+
1| . . . | . . . | . . . |
2| . . . | . . . | . . . |
3| . . . | . . . | . . . |
+---------+---------+---------+
4| . . . | / X / | . . . |
5| . . . | X X X | . . . |
6| . . . | / X / | . . . |
+---------+---------+---------+
7| . . . | . . . | . . . |
8| . . . | . . . | . . . |
9| . . . | . . . | . . . |
+---------+---------+---------+