A difference of 0 or 2 No. 4
(Published on 8. September 2025, 15:41 by RailMan)
Irregular sudoku rules apply. Place the digits 1 - 6 once in every row, column and bold outlined region.
Digits that are diagonally adjacent and in different regions must have a difference of 0 or 2. Eg. If R3C3 is a 6, then R2C4, R4C2 and R4C4 must be either 4 or 6.
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Solution code: Row 6
Solved by BenClancy, Kitty Trouble, Joyofrandomness, SKORP17, GorgeousNicko, RobJH, Megalobrainiac, jalebc, RickiFerrara, kkli, gReinares, fuxia, xiaozhu, NEWS, josemadre
