ref: b9547673c6462bf73e642328300479df6df71d7b
parent: 04e3e09b8743acd1fffc7b756d876f47cbb35a88
author: Simon Tatham <anakin@pobox.com>
date: Sat Oct 28 11:38:53 EDT 2006
Mike Pinna has done some major reworking of the Loopy solver, giving rise to a new Hard difficulty level. [originally from svn r6880]