-Normal sudoku rules apply.
-Arrow: Digits along an arrow must sum to the digit in the circle.
-159: A digit in column 1 indicates the column in which the digit 1 appears in that row. Columns 5 and 9 have the same rule for the digits 5 and 9 respectively. (For example, a 4 in R7C1 tells you there's a 1 in R7C4. A 7 in R3C5 tells you there's a 5 in R3C7.)
Solution code: Row 1 followed by row 9 (no spaces and no commas) ie (123456789987654321)
on 16. July 2022, 00:21 by Kigor
Great puzzle! Only pure logic required, enjoyed each step, thanks a lot!)
on 24. May 2022, 02:14 by mathpesto
Lovely puzzle! Great interactions between the rulesets.
on 22. May 2022, 21:42 by wenchang
Very nice! https://youtu.be/2_DKWoBeSm8
on 21. May 2022, 12:48 by drbs
Sehr schön, diese Index-Puzzles gefallen mir.
on 21. May 2022, 11:25 by kolot
There are some beautiful interactions in this puzzle. I enjoyed it.