LITS^2 is possibly my only creation that has caught on. There aren’t many LITS variations, let alone five years ago. The idea of cramming two pieces in each region proved to be a success as several other authors are now writing their own LITS^2.
The puzzle in the online test had a simple LMI theme. I recall tweaking for hours to get rid of that notch on the “M” – but gave up when the deadline was approaching.
LITS^2: Shade in two tetromino pieces in each bolded region. The two pieces in the same bolded region may not be adjacent to each other. Otherwise, standard LITS rules apply.