Sudoku Variants Series (037) - X-Sums
(Published on 12. August 2014, 00:00 by Richard)
X-Sums
Solve online in F-Puzzles (thanks checkoway!) or in Penpa+ (thanks panthchesh!)
Place the digits from 1 tot 9 in every row, column and 3x3-block. Numbers outside the grid indicate the sum of the first X digits in the corresponding direction. X is the first digit in the corresponding direction.
Solution code: Row 4, followed by row 6.
Comments
on 7. April 2023, 02:41 by RussKozerski
Not usually a fan of x-sum puzzles. Adding more than two single-digit numbers together seems to make my head fog up. But this one was approachable and enjoyable. Thank you.
on 3. March 2023, 03:20 by DanSkorne
My first ever x-sum and took me 1 hour 23 minutes. :( Fun but I definitely struggled!
on 3. November 2022, 22:30 by kenferguson
Really enjoyed this - looked like it would be tough then suddenly freed itself up!
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Thx for the comment.
For me this is a nice showcase how this variant evolved in the last decade; by today's standards it is extremely easy, and if I would write one today for the first time, I would also make it deliberately harder; but it is still a nice introduction example for this type I guess.
on 23. November 2021, 20:24 by Richard
Added links for online solving. Thx checkoway and panthchesh!
on 14. October 2021, 00:13 by patinthehat48
Enjoyed this puzzle very much, was a great way to learn about X-sums
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@patinthehat48: thx! For today's standards it's very much on the easy side, but back in 2014 the bar was a bit lower! :-)
on 20. July 2021, 09:46 by checkoway
https://f-puzzles.com/?id=yfpzrw58
on 20. November 2020, 05:07 by panthchesh
Penpa for you: https://git.io/JkzCi
on 1. June 2016, 06:39 by ohm0123
Thank you. Richard.
on 13. August 2014, 12:57 by Eisbär
One of the "smoothiest" SVS-puzzles I solved so far... thank you Richard!
