QOTD: Do you Sudoku?

Here is the Question of the Day:

Maki Kaji, creator of Sudoku puzzles, died recently. It was reported that his life’s work was spreading the joy of puzzles. The game, which appears in the Delaware State News daily, consists of players placing the numbers 1 through 9 in rows, columns and blocks without repeating them. Do you play? How challenging do you find the puzzles? 

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