+the fewer large regions of colour and thus the more difficult it is to
+successfully clear the grid.
+
+\dt \e{Scoring system}
+
+\dd Controls the precise mechanism used for scoring. With the default
+system, \q{(n-2)^2}, only regions of three squares or more will score
+any points at all. With the alternative \q{(n-1)^2} system, regions of
+two squares score a point each, and larger regions score relatively
+more points.