Colour Wheel (Colourful Killers, Rotational Pairs)
(Published on 18. May 2024, 00:55 by The Book Wyrm)
The first version of this puzzle was originally created in 90 minutes during a Speed Setting competition. This version has been updated to fix an error in setting, as well as improve the ending.
Rules:
- Normal sudoku rules apply: place the digits 1-9 once each in every row, column and region.
- Colourful killers: Digits in a cage do not repeat. Colour each cage according to the last digit of the sum (i.e. cages that sum to values with the same last digit are the same colour, and cages that sum to values with a different last digit are different colours). Numbers in the top left corner of a cage give the sum of all orthogonally adjacent cages of different colours.
- Rotational pairs: Every digit, except the digit in the center (r5c5), has a 'partner digit' that is always placed 180° rotationally symmetrical to it, seen from the center of the grid. Which digits are paired up must be deduced by the solver. (Example: If the digits 1 and 2 turned out to be a rotational pair, and r2c4 is a 1, r8c6 must be a 2.)
Penpa+ link: Click Here
Sudokupad link: Click Here
Solution code: Row 5
Solved by ademjaz, Piatato, Paletron, SKORP17, cornish-john, damasosos92, samuel1997, fjam, SirRookie, mew_rocks, juventino188, jinkela114514, jkuo7, giladooshlon, PitSoft, P12345, sorryimLate, madhupt, OGRussHood, Puzpensu, ddx01, Chishiri, MrQubo, DavidH, Uhu, Leilalu222, redfoot, QuiltyAsCharged, michaal94, wullemuus, hrhgln
Comments
on 20. August 2024, 11:30 by wullemuus
Fascinating combination of these puzzle variations!
on 2. June 2024, 06:55 by ddx01
Fantastic puzzle. So interesting how it works!
on 27. May 2024, 22:37 by madhupt
Stupendous!
on 27. May 2024, 11:21 by PitSoft
the break in was obvious enough, but after that, it gets really hard. It's really beautiful and unusual.
on 19. May 2024, 23:06 by damasosos92
This is just brilliant and hard. Just the fact that the break-in of this puzzle was created in 90 minutes is astonishing.
Put it into my list of favourites.
on 18. May 2024, 12:25 by Piatato
Awesome puzzle, thanks!
on 18. May 2024, 09:14 by ademjaz
Brilliant!
