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Has anyone ever done the Challenging Sudoku in the Metro?
I've gotten kinda far on today's (06/07), but once again I am completely stuck.
I started asking people on the train if they could help me, which in turn led to me meeting a nice Japanese family that lives in my town, and wowing them with what little Japanese I have learned from various anime series (yuroshkine kinda means nice to meet you).
But basically, has anyone managed to do a Challenging Sudoku ever, particularly yesterday's one?