Locked In Place (Quadruple Killer Sudoku)
(Published on 20. December 2024, 11:00 by sujoyku)
- Normal sudoku rules apply, i.e. each row, column and 3x3 region has to contain the digits from 1 to 9 once each.
- Killer cages: Digits in a cage do not repeat and sum to the clue in the top left.
- Quadruple: Digits in a circle must appear in the four surrounding cells.
Here you can solve the puzzle online:
Solution code: Row 5 from left to right (9 digits in total)
Comments
on 23. January 2025, 11:18 by TheNineElements
Solve Time: 18:35
I rated this 2/5 difficulty.
Very fun sudoku! This really tested my ability to pencilmark effectively and it was a very nice solve! I felt like I made consistent progress throughout the solve, and it was quite enjoyable overall.
I'm not sure if coloring different parities or entropies (H/L) would have made the solve easier, but I used this puzzle as an exercise in spotting pairs/triples/quads - which was enjoyable and a different strategy than I typically use for variant solves. Having all 4 values for each of the quads made pencilmarking quite satisfying but I probably went a bit overboard with marking everything. The puzzle had some nice 'overarching' ideas that made eliminations more straightforward and had some nice logic that just kept propogating around the entire grid. Since I pencilmarked so many different cells, the whole puzzle nicely collapsed once I had placed most of the 'important' digits.
The break in was probably on the harder end of 2/5 difficulty puzzles for me, but was still generally approachable for its difficulty class. Midgame through the completion was a fair 2/5 difficulty as well.
Overall my difficulty rating would be 2/5. Thanks for sharing!
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You are much welcome, TheNineElements, thank you for your detailed comment! I am glad that you enjoyed the quads leading to some classic sudoku deductions.
Kind regards, sujoyku
on 1. January 2025, 07:45 by NEWS
I have a plan this year, which is to solve all of your masterpieces.
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Thank you for your comment, NEWS! It is nice that you plan to solve more of my puzzles. I wish you happy solving with all of them.
Kind regards, sujoyku
on 26. December 2024, 00:46 by Lenivaya_Joppa
Thank you for this nice puzzle, dear sujoyku! :)
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Thank you for commenting, Lenivaya_Joppa! It is great to hear that you liked the puzzle.
Kind regards, sujoyku
on 24. December 2024, 19:56 by Visumation
Cool puzzle.
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Thank you for commenting, Visumation! I am glad you liked the puzzle.
Kind regards, sujoyku
on 24. December 2024, 19:23 by Inge
Very nice puzzle!
Thanks for charing
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You are much welcome, Inge! I am glad you enjoyed the puzzle.
Kind regards, sujoyku
on 21. December 2024, 00:53 by antiknight
Nice combination of rules! Liked the ending :)
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Thank you for your comment, antiknight! I am glad that you liked this combination and the ending.
Kind regards, sujoyku
on 20. December 2024, 16:37 by alefenu
This was very very fun. I didnt need to color
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Thank you for your comment, alefenu! I am glad you had a fun solve.
Kind regards, sujoyku
on 20. December 2024, 16:21 by GeorgeTheToad2
Very nice combination. I tried not to colour but had to on a couple of occassions. Thank you.
**
You are much welcome, GeorgeTheToad2, thank you for commenting! I think colouring might not be strictly necessary, but I used it in my own testing as well. I am glad you enjoyed this combination of constraints.
Kind regards, sujoyku
on 20. December 2024, 15:06 by baltoguy
Loved this puzzle. Thought I was going to have a deadly pattern at the end. Then saw the information I missed.
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Thank you for your comment, baltoguy! I think I know exactly which deadly pattern you are thinking of. It is great to hear you liked the puzzle.
Kind regards, sujoyku
on 20. December 2024, 14:20 by egubachu
Very enjoyable! Thanks for setting and sharing!
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You are much welcome, egubachu, thanks again for testing and leaving such a nice comment! I am glad you enjoyed the puzzle.
Kind regards, sujoyku
on 20. December 2024, 14:05 by OGRussHood
A great way to start my Friday morning: solve a sujoyku puzzle, then watch Simon's crossword solve.
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Thank you for your comment, OGRussHood! I feel honoured to be named in the same sentence with Simon. :)
I am glad you had fun solving.
Kind regards, sujoyku
on 20. December 2024, 11:25 by 9Rookienumbers
Thank you sujoyku, beautiful essential puzzle!
Possibly easier than 3 stars
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Thank you for your comment, 9Rookienumbers! My own testing and feedback suggested the difficulty was between 2 and 3 stars. I wanted to let you solvers decide and I am completely fine with it being at 2 stars. I am glad you liked the puzzle.
Kind regards, sujoyku
