Normal sudoku rules apply.
Digits on the marked diagonal do not repeat.
Digits on fortress cells are greater than all their orthogonal neighbors.
Digits in a cage sum to the indicated number.
Digits separated by a red dot have a difference of 2.
Also, all digits in the grid need a friend, i.e at least one orthogonally connected consecutive digit.
Sudokupad : Click here
Solution code: All digits in row 3, from left to right (for example 1234546789)
on 27. January 2026, 20:40 by Phantou
Thanks for testing ! Glad you enjoyed it :)
on 27. January 2026, 06:51 by superkinkel
Incredible ruleset. Thanks!
on 26. January 2026, 20:33 by Qodec
An absolute blast. Thanks!
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