Three Hole Punch Sudoku
(Eingestellt am 18. Juni 2020, 19:06 Uhr von RockyRoer)
The 'holes' inside certain letters and numbers are called "Counters". The numbers 4, 6, 9, 0 each have 1 counter, and 8 has 2 counters.
This sudoku is all about counters. Normal killer sudoku rules apply, with a few important additional rules:
- Every cage contains exactly three counters within both its cells, and the numbers in the sum itself. For example:
- A cage could contain the numbers 3469 which add up to 22, and there are three counters (the 4, 6, and 9)
- A cage could contain the numbers 4 and 6 which adds up to 10, and there are three counters (the 4, 6, and 0 in 10)
- A cage could contain the numbers 4 and 8 which adds up to 12, and there are three counters (the 4, and two from 8)
- The three counter symbol that shows in each cage is always in the largest cell in that cage.
- In purple around the outside of rows and columns, every row or column where the digits and sum of a sandwich (between 1 and 9) contains 3 counters the symbol is shown. (The counter in the 9 would not be counted, of course.)
- In green around the outside are little killer clues along every diagonal that contains three counters in both the sum and cells. Note, digits can repeat along little killer diagonals, so a diagonal of 4, 5, 3, 4 = 16 would be marked.
Oh, and one more thing, you'll need to figure out where all the cage sums belong. At least you know what they are. You can try the puzzle on Sven's Sudokupad
Lösungscode: Type in row 5 from left to right.
Kommentare
am 31. Dezember 2025, 15:19 Uhr von RockyRoer
Added link and shorted solution code.
am 31. Dezember 2025, 01:05 Uhr von ThePedallingPianist
Link with solution check:
https://sudokupad.app/xxg366ydb0
Also, we found that the negative constraint did NOT apply on diagonals.
Otherwise, really cool innovative ideas for a 2020 puzzle that have helped to shape the sudoku genre of the future! Thank you for setting :)
am 24. Oktober 2025, 02:04 Uhr von Nell Gwyn
Why am I reminded of the first question of The Impossible Quiz...
am 24. Oktober 2025, 00:15 Uhr von aqjhs
really nice!
i transcribed it to sudokupad
https://sudokupad.app/k6amy6uw3g
am 20. Oktober 2025, 07:57 Uhr von isajo4002
Amazing puzzle although I don't think I used the sandwiches at all I kinda forgot that the little killer and sandwich clues even existed but amazing puzzle and I'm surprised that you can solve all but 4 cells with just using the killer and the maximum cells. Had a blast
am 25. März 2023, 16:05 Uhr von Vebby
Penpa+ link with answer check:
https://tinyurl.com/2rxwljxv
am 19. Juni 2020, 17:35 Uhr von Krokant
Funny and enjoyable variant.
What I learned while doing this: Counting counters is harder than it should be. ;-)
am 19. Juni 2020, 17:23 Uhr von RockyRoer
Nutz... had the wrong column in the solution code. I'm SO sorry if you tried this and found it wrong! Should be fixed now!
am 18. Juni 2020, 21:02 Uhr von RockyRoer
What I learned most about myself doing this: I don't actually draw my 4's with counters :-)
