Logic Masters Deutschland e.V.

Donuts

(Published on 26. October 2023, 03:30 by Die Hard)

Intro

This is a puzzle that I have worked on for a long time. It is definitely difficult, so only attempt it if you enjoy a serious challenge!

Rules

Fill the grid with nine non-overlapping donuts (3x3 regions with no middle cell), such that each donut contains 8 of the digits 1-9 once each and no two donuts contain the same digits.

The donuts must be flavoured as follows:

  • 2 x renban raspberry (digits form a consecutive sequence in any order).
  • 3 x parity pineapple (digits alternate between odd and even).
  • 4 x thermo cinnamon (digits increase around the donut).

Cells outside donuts do not contain digits and digits must not repeat in any row or column. Finally, digits in cages must not repeat and must sum to the cage totals.

Play on CTC

Please leave comments if you complete this puzzle.

Solution code: All of the digits in row 2.

Last changed on on 27. October 2023, 11:42

Solved by h5663454, Dentones, loat, Snookerfan, tuturitu, sanabas, Leonard Hal, Goh-joh, amarins, jkuo7, Tom-dz, DVFrank, akamchinjir, tonald, rmn, soroush, Martijn314, cdwg2000, Jesper, Lyun Licuss, halakani, SXH, Brodie2000, dogfarts
Full list

Comments

Last changed on 26. November 2023, 21:12

on 26. November 2023, 13:59 by picoton
i dont understand the image… is this a clue or what?

Die Hard: The image is illustrating what the donuts look like (ie: 3x3 areas with no middle cell). It is recommended you use colours to fill in the donuts as you locate them.

on 27. October 2023, 13:42 by Goh-joh
Hard, but not very hard. I made a thinking mistake halfway through and got stuck, so it took me awhile. Lot of colouring ;-).

Very nice and rewarding to battle for the determination of all the cells!

on 27. October 2023, 12:29 by sanabas
Stayed consistently tough all the way until the end, every deduction felt like an achievement. Great fun.

on 27. October 2023, 01:11 by Die Hard
Updated image.

on 26. October 2023, 15:23 by Snookerfan
Magnificent! Great idea and execution. Very hard, but with very satisfying and rewarding deductions. Thank you

on 26. October 2023, 04:42 by h5663454
100 out of 5......

Difficulty:5
Rating:100 %
Solved:24 times
Observed:7 times
ID:000FMD

Enter solution

Solution code:

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