RULES: Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and 3x3 outlined box.
Adjacent digits along each marked line have a difference of at least 5.
Digits separated by an X sum to 10; digits separated by a V sum to 5. Not all possible Xs and Vs are necessarily given.
9:37. Very nice !
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