Ottawa Citizen

CONCEPTIS SUDOKU

- DAVE GREEN

To solve this num­ber-plac­ing puz­zle based on a 9x9 grid and with some given num­bers, each 3x3 box, each row and each col­umn must con­tain all the num­bers 1 to 9 — but with the same num­ber used only once in each box and row. So­lu­tion be­low

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