2:57 am
drwho
Difficulty score 18. No green.
6:45 am
irv
how to put ironsudoku on my tablet
9:07 am
spellacked
irv: ironsudoku can only be used as a webpage. The difficulty is that there's no way to do the alt and shift clicks to get red and green numbers. However, bookmarklets for filling in all the green numbers (google "sudoku brittlefish") should work, depending on your browser.