+}
+
+\dt \e{Ensure unique solution}
+
+\dd Normally, Rectangles will make sure that the puzzles it presents
+have only one solution. Puzzles with ambiguous sections can be more
+difficult and more subtle, so if you like you can turn off this
+feature and risk having ambiguous puzzles. Also, finding \e{all} the
+possible solutions can be an additional challenge for an advanced
+player. Turning off this option can also speed up puzzle generation.
+