Double, Double
(Published on 13. August 2022, 22:07 by zetamath)
Normal sudoku rules apply.
The digit in the square cell is 2, 4, 6, or 8.
The rest of the clues in the grid are double arrow clues. The sum of the digits along a line is equal to the sum of the digits in the circles at either end of the line. Digits may repeat freely along a double arrow.
Additionally, the grid contains 9 doublers, one in each row column and box. For purposes of double arrow clues, cells on doublers count as double their value.
Each digit from 1 through 9 is doubled exactly once.
Have fun, leave a comment if you enjoy the puzzle!
PS: I stream solving sudoku like puzzles twice a week. You can check out the channel, as well as some videos I have made about setting puzzles, at my YouTube channel here.
Solution code: Row 1 followed by Row 9
Comments
on 29. November 2023, 17:43 by StephenR
As ever, beautifully crafted like a finely engineered timepiece, thanks.
on 24. August 2022, 16:39 by purpl
Absolutely loved it! Doublers and double arrows have come so far already :D
My solve can be found on stream here: https://youtu.be/E-PsNScM5SA?t=5121
on 18. August 2022, 00:15 by chalk235
I really like the doublers rule set - tricky, but it adds spice!
on 17. August 2022, 01:49 by peacherwu2
Hard at box 6 & 9, just got lucky.
on 16. August 2022, 01:27 by Agent
Note to self: a circled digit added to the contents of the line do not sum up to the digit in the other circle.
on 15. August 2022, 23:40 by Christounet
Triple the fun with your doubler puzzles so far. Keep them coming !
on 15. August 2022, 21:40 by twototenth
Gorgeous and innovative; engaging and challenging every step of the way.
on 15. August 2022, 05:47 by thoughtbyte
Stunning puzzle, very fun with fresh logic throughout. Yet another gem of yours, thank you @zetamath!
on 15. August 2022, 05:15 by bansalsaab
Beautiful puzzle. I had the right idea but made calculation error twice but finally made it.
on 14. August 2022, 20:54 by Godrick
Wow! That was a hard, but very funny introduction to double arrows. Very nice puzzle!
on 14. August 2022, 17:49 by Vebby
Superb!
on 14. August 2022, 15:10 by cdwg2000
Awesome setter!
on 14. August 2022, 02:50 by JayForty
Amazing puzzle! Beautiful and quite original. Thanks!
on 13. August 2022, 23:28 by tallcat
Really beautiful use of both constraints. I think this is probably the best doubler puzzle yet!! Brilliant stuff
on 13. August 2022, 22:09 by SirWoezel
Wonderful logic. Don't skip this one!
