ref: 121f664b628c4c1d434cad6950526e5dd469f5ea
parent: e7a02ae3330d9d7f6d81d35985efee47e26f57be
author: Simon Tatham <anakin@pobox.com>
date: Tue Aug 30 15:42:45 EDT 2005
Forcing chains in Map give rise to a new `Hard' difficulty level. Also implemented the Map analogue of Solo's pencil marks, to make this mode more playable. [originally from svn r6240]