3 ms·
An early xkcd did something similar for Sudoku (this was back when both xkcd and Sudoku were still new). https://xkcd.com/74/ https://xkcd.com/74/
by csense 13y ago
An early xkcd did something similar for Sudoku (this was back when both xkcd and Sudoku were still new). https://xkcd.com/74/ https://xkcd.com/74/