Normal Sudoku rules apply. Blue lines are region sum lines; the digits along these lines must have the same sum in each region entered by the line. The grid contains nine "doublers," one in each row, column, and box; each digit from 1-9 is "doubled" exactly once. Doubled digits count as twice their value for the purposes of the sum lines.
CTC link (with solution check)
Lösungscode: Row 6 followed by column 7, no spaces
am 9. Oktober 2022, 11:50 Uhr von ddx2407
Some neat deductions there! And non-conventional use of doubles.
Very well done. Thank you!
am 9. Oktober 2022, 00:58 Uhr von SimplePurpleFrog
Wow! What a beautiful puzzle.
Great logical flow, a lot of fun to solve.
am 15. September 2022, 05:14 Uhr von Vebby
So good! A joy to solve.
am 11. September 2022, 05:12 Uhr von wooferzfg
Really fun!
am 10. September 2022, 07:54 Uhr von Christounet
Great use of the doublers !
The break in and following steps are very clever, with rather simple ideas put together in a powerful combinaison of region sum lines.
Wellington donc !
am 10. September 2022, 01:06 Uhr von zetamath
One of my favorite puzzles of the year, seriously!
am 9. September 2022, 01:37 Uhr von thoughtbyte
Beautiful, smooth, and a sweet spot for difficulty. Thanks @twototenth!
am 8. September 2022, 02:53 Uhr von Ambrose
Thoroughly enjoyable!
am 8. September 2022, 01:56 Uhr von cdwg2000
【双倍数区域总和线数独-哔哩哔哩】 https://b23.tv/qWniwIQ
am 7. September 2022, 21:36 Uhr von djorr
I always love your titles. Very nice construction and a break-in with quite some thought. Loved it!
am 7. September 2022, 03:55 Uhr von cdwg2000
Very nice and smoothly.
am 6. September 2022, 14:25 Uhr von Andrewsarchus
An amazingly well constructed puzzle! The solve path flows very smoothly throughout, leading to a very pleasing and elegant solve.