Spirograph
(Published on 27. December 2023, 00:00 by Tingo)
The rules are as follows:
Normal Sudoku Rules Apply
The spiral is comprised of 4 lines, each of length 9, that share their origin digit (r5c5). The line type must be determined by the solver. There is one line of each of the following types:
German Whispers lines - Adjacent digits must differ by at least 5.
Region sums line - Digits along a line must sum to the same total in each region the line enters. If a line enters a region multiple times, each instance is calculated separately.
Renban line - all digits along the line are consecutive in any order.
Thermometer - digits must strictly increase from the bulb end. Furthermore, the center digit of the puzzle acts as the bulb.
Cells joined by Xs sum to 10. Not all Xs are given.
Digits in cages must sum to the value in the top left corner of the cage. Digits cannot repeat within cages. Additionally, the 2-cell cage in column 8, rows 3 and 4, has a value of 10.
The puzzle can be played at F-Puzzles here!
The puzzle can be played at CTC here!
Questions, comments, concerns and jokes are all welcome! Thanks for playing!
Solution code: Row 9 followed by Column 4, 18 digits total
Comments
on 28. December 2023, 00:52 by HumanBirdsong
A lovely concept, well-executed. Thanks for a fun puzzle!
on 28. December 2023, 00:38 by Nylimb
I was a bit confused by the description: First, there are actually 2 renban lines, since the thermometer is obviously one. Second, the comment about the 2-cell cage in column 8, rows 3 and 4, seemed unnecessary until I looked at the F-Puzzles version, where the "10" is partly hidden.
Anyway, nice puzzle. Thanks.
on 27. December 2023, 12:31 by MarthaB
Challenging (for me) and fun!
