Place the digits 1 to 9 in every row, column, 3x3 standard block. Each outside clue corresponds to the arithmetic mean of the first three digits of the row or column as seen from that direction. Besides grey painted cells form renban groups. These groups must hold consecutive numbers, in any order.
Solution code: Column 8, followed by row 2.
on 15. August 2021, 23:28 by zhergan
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