Rules: Place nine non-overlapping 3 by 3 regions in the grid such that each region contains the digits 1 to 9 once each. Within the set of regions digits do not repeat in rows or columns. Numbers outside regions may repeat freely and do not affect the digits inside regions. Uncircled cells outside regions are empty.
Circles: A digit in a circle inside a region counts how many of that digit appear in circles inside regions. A number in a circle outside a region counts how many of that number appear in circles outside regions. No circles are unfilled.
Arrows: Digits on an arrow sum to the number in that arrow's circle. Not all arrow cells need to contain digits. An arrow's circle counts as a circle for the above rule.
Note: Where the rules refer to numbers, these are not necessarily limited to the digits 1 to 9.
Links:
SudokuPad: https://sudokupad.app/e0efv6m8qv
Solution code: Column 3 (use 0 for any empty cells)
on 9. June 2024, 01:22 by Caroline
Very challenging puzzle! It helped when I remembered that I circled cells outside regions must be empty / zero. Typically I prefer a classic grid but this was quite fun.
on 18. May 2024, 15:47 by ViKingPrime
We absolutely need to have more cryptic clues as puzzle titles.
on 18. May 2024, 02:08 by ThePedallingPianist
This is an astonishing construction. The puzzle itself has a beautiful flow and some seriously interesting and varied logic, and then when you take a step back and think about the challenge of actually setting something like this... Well, consider my mind blown! Loved it!
on 14. May 2024, 00:20 by Ratfinkz
Loved this!
on 8. February 2024, 18:34 by hoopsie
Absolutely fantastic puzzle. Even after finding initial break in, it continued to stay difficult but with a great flow
on 8. February 2024, 00:14 by bansalsaab
Amazing puzzle.
on 7. February 2024, 23:02 by Oddlyeven
Provided link did not include full rules.
Link updated to version with full rules.
on 7. February 2024, 18:45 by ademjaz
Lovely puzzle! Very enjoyable