User Intervention Capability
(a) The results after the first iteration step; the user can easily
eliminate the 4th, 7th, 8th and 9th solutions by judging the continuity
of the writings on the tile (b) Five pieces assembled automatically,
i.e., no user intervention yet.
(a) Deleting a wrong partial solution (b) Changing the ranking of a match that is outside the top number of processed states
(a) Updating the solution costs (b) Five-piece partial solutions after the user intervention.
