Or load a previously saved problem Load

Or choose the TYPE of problem to load from the library

+ Problem types of level 0
Smaller and simpler than standard 9X9 sudokus

+ Problem types of level 1
Standard 9X9 or equivalent complexity

+ Problem types of level 2
More complex geometry than standard 9X9

+ Problem types of level 3
More complex still - geometry can wrap side to side and top to bottom