Normal sudoku rules apply.
Instead of 3x3 boxes, the grid is divided into irregular nine-cell regions that must contain the digits 1 to 9. These must be discovered by the solver. Some region borders are given.
Normal killer cage and little killer rules apply.
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Solution code: Middle row, left-to-right
on 13. October 2021, 16:21 by polar
Brilliant puzzle - thanks!
Penpa: https://git.io/JKOBk
on 2. September 2021, 12:10 by uvo_mod
Labels ergänzt.
on 1. August 2021, 11:26 by Mody
Beautyful
on 8. June 2021, 06:23 by manushand
Loved every minute of it, and Peter knows how many minutes that was! :-)
on 19. May 2021, 17:18 by peterchayward
corrected typo
on 17. May 2021, 11:44 by MagnusJosefsson
Very nice puzzle! Interesting throughout.
on 16. May 2021, 19:14 by Sktx
Had me sweating all over the place, for about 2 hours, and several broken tries. The intrication of cages and partial irregular regions is outstanding. Great puzzle, thanks a lot !