Normal sudoku rules apply (digit in each row/column and highlighted box should contain all digits from 1 to 9). One number around black dot is twice of another number. Both numbers around white dot differs by 1.
Solution code: Middle row (5th row) from left to right
on 12. December 2024, 13:52 by Luigi
This is not a beginners puzzle.
on 12. December 2024, 12:17 by Rollo
Nice, but not forbeginners.
on 11. December 2024, 17:16 by fuxia
Nice, approachable puzzle. The software to solve it however is a pain to use.