Butterfly Binairo - A variant on Binary Puzzles
Available at http://www.mpq-software.be/software/butterfly.html
Remarks:
All rows are unique and all columns are unique in the whole puzzle.
By toggling on one of the 5 parts on the small butterfly diagram, the "Hint" button will only scan that part that is toggled on. If no part is toggled on, the "Hint" button wil first scan all parts separately, and if no logical hint is available in any part, then the function will look for almost duplicate rows or columns between the parts.