-Setting a high expansion factor tends to make the game more
-difficult, and also rewards a less deductive and more intuitive
-playing style.
+Setting an expansion factor of around 0.5 tends to make the game
+more difficult, and also (in my experience) rewards a less deductive
+and more intuitive playing style. If you set it \e{too} high,
+though, the game simply cannot generate more than a few rectangles
+to cover the entire grid, and the game becomes trivial.