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Normale Version: chaos construction - looking for a tester
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Hi everyone,
I'm looking for a tester for the puzzle below, which so far seems to avoid being successfully tested at any cost. Needless to say, it is (likely) very hard.

[Bild: fiul.png]

-Standard irregular sudoku rules apply, the regions, however, must be deduced by the solver. Some region borders are given and must be respected.

-All regions are orthogonally connected and are numbered by the digits 1-9. The number of the region corresponds to the digit in its upper left corner (the leftmost cell in the highest row). No two regions may share their number.

-A cell is called friendly, if its digit matches the number of its row, column or region (or more of them simultaneously).

-A border between two regions is friendly, if at least one of its adjacent cells is friendly.

-The number in the upper left corner of the cage shows the sum of the digits in the friendly cells within the cage. Digits may not repeat within a cage.

-The clues outside the grid show the number of the friendly borders in the corresponding row or column.

penpa+ link

Feedback of any kind is welcome really, even if you just get past the break-in or anything. Don't hesitate to ask for a hint if needed.