Irregular 7x7 X-sums (Build your grid)
(Published on 8. February 2021, 13:25 by abed hawila)
Rules:
According to the following rules, the grid is divided into 7 different regions, each regions contains 7 cells:
1. Fill in a number from 1-7 in each region, and make each row, column and region have no repeated numbers;
2. The clues outside the grid represent the sum of the X digits along that row or column, Where X is the first number in that row or column.
3. The end of the X-sum clue represents a border between two different regions. For example, if a 6 clue is 3-2-1, this means that the 3 digits belong to the region and there is a region border at 1 in the direction of the clue.
4. Grey squares are even, and grey circles are odd.
The puzzle is easy and straightforward, counting on your feedback to proceed for a 9x9 grid.
Enjoy!
Solution code: Row 5 Col 5
Comments
on 16. July 2021, 14:12 by AnnaTh
After having solved Jesper's Chaos Construction X-sums first, this was a very fluent solve. But all the same great fun! Very nice idea.
Thank you! glad to hear this, if you want a more challenging puzzle, here is my latest: https://logic-masters.de/Raetselportal/Raetsel/zeigen.php?id=0006PL
on 15. June 2021, 21:01 by Vebby
Fun variant! :)
on 8. March 2021, 17:15 by DiMono
Nice puzzle. I'm inexperienced at Build Your Own Irregular Grid puzzles, so being able to finish one was nice. I had to switch to Penpa to keep things straight though. I've saved my link, with solution check included.
https://git.io/JqINy
on 9. February 2021, 16:50 by Dina
Fun puzzle! I really liked this idea and hope you find time to make another one.
on 9. February 2021, 00:40 by cdwg2000
Regarding Chaos Construction, you can also try the following wonderful puzzles by the author：
Phistomefel's
https://logic-masters.de/Raetselportal/Raetsel/zeigen.php?id=0003D0
stephane.bura's
https://logic-masters.de/Raetselportal/Raetsel/zeigen.php?id=0004II
真笑 (Hong Weihua)'s
https://logic-masters.de/Raetselportal/Raetsel/zeigen.php?id=0005E9
on 8. February 2021, 23:14 by cdwg2000
@abed hawila
I am very glad that you were inspired by the Chaos construction I posted earlier to create beautiful puzzles. Please continue to post more, thank you!
on 8. February 2021, 18:10 by SudokuExplorer
I really enjoy chaos construction puzzles (like those by stephane.bura and by cdwg2000's friend). It was an fun solve!
A minor critique is that it would better if no extra constraints were needed, but that can sometimes be tricky to implement.
on 8. February 2021, 18:00 by marcmees
asap not needed ... "the flood" ... :-)
Marc
on 8. February 2021, 17:45 by abed hawila
@cdwg2000 thank you! This was inspired by one of your puzzle series, Maybe I should have mentioned that in the puzzle description. Indeed, I will try to work on the 9x9 asap.
@marcmees thank you for your feedback! And sorry for the inconsistency. I agree with you, I had no intention to add additional clues and rules but because of the limitations in the grid as you saw in the final grid, I had to add them to disambiguate the deadly pattern without affecting the solving path.
on 8. February 2021, 17:35 by cdwg2000
@abed hawila
I also look forward to your 9*9.
on 8. February 2021, 16:21 by marcmees
Made me think of the cdwg2000 series on chaos construction, which I like. Found the logic pleasant until stuck halfway, to find out about the circle and square that didn't come out on the print. Finished in a minute after that discovery, which made me feel it could have been nicer to get the whole solution path on one rule, not too many add-ons. (addict of simplicity)... but of course , I have no clue what problems setters face to accomplish that. Bravo to all who do.
By the way, I liked it if that was not clear. I am looking forward to your 9x9.
on 8. February 2021, 15:47 by cdwg2000
Nice Chaos Construction!
