ref: c389f623f66fe5296f7ef5c66d88884607b82cff
parent: a8980f3736031dc971754bd7ecc55795680a62e5
author: Simon Tatham <anakin@pobox.com>
date: Mon Sep 12 13:13:26 EDT 2005
Patch from Mike: - remove the backtracking `Hard' level, on the grounds that it was incredibly slow and not really usable. - introduce an `Easy' difficulty level below the standard one; many people seem to find this puzzle unusually hard, so an easy level is particularly helpful. - highlight unfulfillable clue squares (but not yet any other types of obvious error). [originally from svn r6299]