Logic Masters Deutschland e.V.

What

(Eingestellt am 21. September 2023, 04:17 Uhr von zzw)

This is definitely the hardest puzzle I've set so far, and it was also the hardest to set. Once I had the idea I was able to find a unique puzzle fairly quickly, but it's another matter to find a unique and *fun* puzzle. This puzzle isn't exactly easy but I think the solve path is pretty smooth given the constraints. Hope you enjoy it!

Rules:

Chaos construction: place the digits from 1-9 in each cell such that digits don't repeat in any row, column, or region. Regions are groups of 9 orthogonally connected cells that must be determined by the solver.

Japanese sums: clues outside the grid give the sum of all the digits in a contiguous stretch of cells that are in the same region (ending either at the edge of the grid or a different region). A ? specifies a sum less than 10, and a ?? specifies a sum greater than or equal to 10. All clues are given and in the correct order.


Solve links:
SudokuPad
Penpa

Lösungscode: Column 1 followed by row 8

Zuletzt geändert am 22. September 2023, 01:09 Uhr

Gelöst von by81996672, Snookerfan, Gryllulus, Dentones, fjam, Myxo, Jesper, wisty, Niverio, Playmaker6174, Azumagao, dodo, jkuo7, sanabas, rmn, samuel1997, OutOfMyMindBRB, dogfarts, polar, Leonard Hal, SXH, ... pms_headache, KNT, hoogachakka, Tom-dz, Lavender Gooms, Yaki50, lerroyy, starelev5, akamchinjir, Gliperal, KurtSchneider, ascension, Silverstep, MCMCHammer, jinkela114514, h5663454, AnnaTh, Paletron
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Kommentare

am 15. Februar 2024, 10:40 Uhr von Edward III.
Sadly, after nearly 5 hours of trying, I concluded that with my setup it is impossible to solve and I dont see any other setups. Truly a shame, because until this point i had great fun trying to solve.

am 25. Dezember 2023, 07:52 Uhr von Silverstep
There's no single deduction that warrants a 5-star rating, this is like a bajillion 3-star-ish deductions chained together repeatedly hitting the solver in the noggin. 275 minutes, regretted none of it

Zuletzt geändert am 18. November 2023, 21:18 Uhr

am 18. November 2023, 18:43 Uhr von KurtSchneider
building the regions was a ton of fun and flowed really well. i'm sure i missed some logic on the sudoku part afterwards because it was a slog for me to finish it from there. just lots of places to look and difficult to scan the grid, at least for me. anyways, great puzzle!

~~

Thanks! Yeah, in retrospect the solve path isn't as interesting as I'd like on this one. There's not a huge variety of deductions, and involves a lot of diligent pencil marking. There's a way through that's not too long, but it's not easy to spot, so I think "slog" is a fair description. A lot of the coolness of this puzzle is just from the fact that it's possible, rather than insights you have while solving. I think my puzzles after this have gotten a lot better in that respect.

am 26. September 2023, 18:28 Uhr von Xendari
Such an excellent idea and a really nice solve path as well :)

am 24. September 2023, 23:44 Uhr von halakani
Construction part was really fun

am 23. September 2023, 12:52 Uhr von henrypijames
I'm again (after the testing phase on Discord) surprised how many people have managed to solve this incredible and incredibly hard puzzle in such a short time.

Zuletzt geändert am 22. September 2023, 13:06 Uhr

am 22. September 2023, 12:42 Uhr von samuel1997
This is interesting and very very insane! The sudoku part is just brutal! I bet this puzzle will be featured in CTC with a movie-length video because it is just so good!

am 22. September 2023, 01:09 Uhr von zzw
Slightly change rule wording in links

am 21. September 2023, 22:50 Uhr von Playmaker6174
The sheer amount of miracles happening in this puzzle is just wildly impressive, but this one should also come with a warning that it's really not for the faint of heart.

A very interesting first half with how region buildings are done, but the later half was full of concentration till the very end, where every single cell was important and not one single clue was missed out at the end. Absolutely mad, yet wonderfully cool puzzle overall :O

am 21. September 2023, 22:38 Uhr von Niverio
Ridiculous that this exists. Very brutal mid solve but that's the price for keeping the miracle intact :)

am 21. September 2023, 22:29 Uhr von wisty
Very fun puzzle! Smooth region building, and tricky but fair irregular logic which I always love :)

am 21. September 2023, 20:36 Uhr von Myxo
A miraculous grid with a really fun and challenging solve! Loved it :)

am 21. September 2023, 14:47 Uhr von Snookerfan
Great puzzle! The region building was already interesting, but filling the sudoku was mindbending. Thank you.

Zuletzt geändert am 21. September 2023, 13:49 Uhr

am 21. September 2023, 13:18 Uhr von by81996672
This is my first time doing a Japanese sums puzzle.The chaos construction in the front did not block me for too long, while the total amount of Japanese sums in the back blocked me for a few hours.I think I'm not very proficient yet. Overall, I feel pretty good about it. That's a really good puuzle. Thank you!

Schwierigkeit:5
Bewertung:91 %
Gelöst:48 mal
Beobachtet:3 mal
ID:000F8Q

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