9-steps Tutorial: X-sum
(Published on 22. February 2024, 17:14 by Azireo)
9-steps Tutorial: X-sum
Here is a tutorial sudoku teaching the X-sum constraint and aimed at first-timers. It is accessible, though not the easiest puzzle. When following the steps, it is build to showcase some common logic of this clue type. However, if you feel like it, or for more experienced solvers, feel free to solve it any way you like, there are no rules! (Except the following...)
Rules: Normal sudoku rules. Clues outside the grid indicate the sum of the first X digits in that row/column where X is the closest digit to the clue.
Link: CtC app
Last puzzle in the serie: Equal sum line
Solution code: Top row, from left to right
Comments
on 23. March 2024, 01:11 by Tingo
This is another great puzzle in the series. Thanks for setting and sharing!
on 1. March 2024, 18:24 by deadpanditto
Fun solve. I got tripped up with the 15s on my first attempt, but once I kept my math straight, it was very straight forward.
on 1. March 2024, 01:07 by Azireo
Thank you so much for your comments, this means so much!
on 26. February 2024, 01:31 by Chad
This was my first x-sum puzzle and I really enjoyed it!
on 23. February 2024, 00:40 by MisterPine
Very enjoyable puzzle for a beginner like me. Some things I will (hopefully) remember.
I'll definitely have to try the other ones in the series!
on 23. February 2024, 00:17 by sujoyku
I completely agree with anyeyeball's comment. It is important to have puzzles that are approachable and showcase some common deductions of the respective variant. Moreover, I found this puzzle very enjoyable. Thank you for setting and sharing, Azireo!
on 22. February 2024, 22:54 by anyeyeball
This puzzle is a very nice introduction to X-sums. Thank you for setting these; you are doing good work that will draw new people into variant sudoku.
on 22. February 2024, 17:17 by Azireo
Almost activated an incomplete version!
