The original idea for these levels goes to Dries de Clercq!
The new feature is the core and the edge. This version is
bigger and harder than the previous. The last level of this
collection is considered (by me) to be one of the most
difficult of all time. My solution has 207 global orimaze changes.
It is also difficult to enter the center right-down from bottom
side and the center left-up from the right side; yet the last
level requires that the player enters the centers from these sides
three times, which is maximum possible.
If you want to solve this level, you have to transform
it to orimaze, which is not an easy task (see Dries' description).
Even here it is difficult to solve it because the orimaze from
sokoban level requires a complete info of all elements' states
at the begining and end. I've done this like chess matrix in
which I've transformed the simple vertical and horizontal
lines into vectors.
Note. It is Not allowed to publicly
display the lurd for these levels.
PS
Happy Birthday to Christina
Merry Christmas
Happy New Year 08