Break down some of the walls below so that what is left are six regions separated by the remaining walls, each of which contains exactly one each of the letters A through F.

+---+---+---+---+---+---+
| E | A | F | B | E | F |
+---+---+---+---+---+---+
| C | F | C | E | D | C |
+---+---+---+---+---+---+
| A | A | D | B | D | E |
+---+---+---+---+---+---+
| F | B | A | D | B | C |
+---+---+---+---+---+---+
| E | D | C | B | A | E |
+---+---+---+---+---+---+
| C | B | F | D | F | A |
+---+---+---+---+---+---+

+---+---+---+---+---+---+
| E | A   F   B   E | F |
+   +---+   +---+   +   +
| C   F | C | E | D | C |
+---+   +---+   +---+   +
| A | A   D | B | D   E |
+   +   +---+   +   +---+
| F | B | A   D | B | C |
+   +---+   +---+   +   +
| E   D | C | B | A | E |
+       +   +   +---+   +
| C   B | F | D   F   A |
+---+---+---+---+---+---+

As there is no requirement that regions can not be partially boundless, another solution would be to remove some of the outer-walls. Of course, in this case, the text accompanying this solution does contain more than one of each of the given letters, thus invalidating the optional solution.

    +---+---+---+---+---+
  E | A   F   B   E | F |
+---+---+   +---+   +   +
| C   F | C | E | D | C |
+---+   +---+   +---+   +
| A | A   D   B | D   E |
+   +---+---+---+   +---+
| F | B   A   D | B | C |
+   +---+   +---+   +   +
| E   D | C | B | A | E |
+       +   +   +---+   +
| C   B | F | D   F   A |
+---+---+   +---+---+---+

Edited on January 12, 2015, 10:47 pm

Posted by Dej Mar on 2015-01-12 11:44:20