This collection consists of 10 levels: one for each digit. The difficulty of the levels varies. I think that you will be able to test them profitably. sokoban@online.fr http://sokoban.online.fr ### # @.# # $$* # # #. # # # # $# # # .# ### #### ## # # # # # ###$$# #..# #..# #@$$ # # # ###### #### ## # # .# # .# # ###@ # # $ # ## $ # # $ #### # $. # # . # ######## ######## # # #@$ $$ # #### # # ## # # #. .# # . # # # #### ### # # # # # #.$## # ..@ # # $$* # #### # # # #### ####### ## # ## $ # # $ ##### # $$@$ # # # ##### # #. # # # #. .## # # # #. . # ##### #### # .. # #.@*$ # # # # # ##### #. $ # # $ # #.### # # $ $ # # # #### ######## # # # $ $ # #### $ # #.$ ## #. ## ##.@## # . # # $$ # # . ## #.$# #. # #### ##### ## @ ## # .$. # # $.$ # #$.$# # . # # $.$ # # .$. # ## ## ##### ###### # . ## # *.* ## # $#.#$ # # $ $ # ####### # # ### # # $.$.$ # ## .@. # #######