Quad index
(Published on 31. January 2025, 09:24 by ark29)
Normal sudoku rules apply [Place the digits 1-9 in every row, column, and 3x3 box]
159: Digits in column 1 indicate the column in which the digit 1 appears in that row (e.g. if r4c1 is a 6, r4c6 is a 1). The same is true of column 5 and the digit 5 and column 9 and the digit 9.
Quadruple rules: A digit inside a white circle must appear in at least one of the four cells surrounding that circle.
Digits cannot repeat across both marked diagonals
You can play here
159: Digits in column 1 indicate the column in which the digit 1 appears in that row (e.g. if r4c1 is a 6, r4c6 is a 1). The same is true of column 5 and the digit 5 and column 9 and the digit 9.
Quadruple rules: A digit inside a white circle must appear in at least one of the four cells surrounding that circle.
Digits cannot repeat across both marked diagonals
You can play here
Solution code: box 9
Last changed on on 31. January 2025, 09:25
Solved by Marcos, StefanSch, wang, SirWoezel, Killer-Ly , sandmoppe, olliwright, jadezki, dickey, kublai, fuxia, SKORP17, damo_89, therealsillypenguin, Shmartus, kkli, Mar, jalebc, Bjd, Ungesundheit, pdabraham, Elliott810, handris, geronimo92, alexlovi, DedaKosta, NEMESIS, Omnicole, Julianl, Llamaths, lianarox, b413x, Crissu2, belnovic, WvdWest, MaxSmartable, dipiz, 99jau99, pepe74287
Comments
on 4. February 2025, 13:33 by NEMESIS
Too hard for me so I did bifurcation
on 31. January 2025, 21:08 by therealsillypenguin
Thanks for the puzzle! The interactions between the circles and index lines were not obvious at first but made for a pretty satisfying solve
on 31. January 2025, 11:56 by SirWoezel
Found this much harder than 2 stars, but I'm quite bad at this indexing-thingy. Nice puzzle!
on 31. January 2025, 09:25 by ark29
Forgot to set predicted difficulty
