Portal Rainbow
(Published on 13. October 2025, 05:59 by Oatmeal)
Portal Rainbow

Rules:
- Normal 8x8 sudoku rules apply.
- Portals of the same colour are linked. Other puzzle elements can traverse these portals. Cells connected by a portal must have consecutive digits.
- Digits separated by a black dot are in 1:2 ratio. A black dot in a portal indicates a 1:2 ratio between the linked cells. Digits separated by a white dot are consecutive. Not all dots are given.
- Digits along a purple Renban line form a set of consecutive digits in any order.
- Digits in a cage sum to the given value. Digits cannot repeat in a cage.
- Digits in a grey circle are odd.
- Digits in a circle must appear in the surrounding cells.
Solution code: Row 8 (left to right)
Last changed on on 13. October 2025, 16:54
Solved by Kirk Fogg, allama, xrrx, flaemmchen, josemadre, jalebc, metacom, Ndstripes, maglia, zhangjinyang, trencaclosques, XhcnoirX, Photyne, root_vegetable, coreydixon, SKORP17, cornuto, akurski, zrbakhtiar, ... sze, ManuH, teuthida, geronimo92, thebriskt, BlackApolloX, david.woitkowski, stafen, Don_Huan, ParaNox, ana_shadow, JVA, achambers2010, Dialo_Malison, mocloud, timww572, CirnoEX, fmacquar, Uhu
Comments
on 15. October 2025, 08:24 by SanFranSam
Would have gone faster if I hadn't kept putting 9s into the cells. ;)
on 13. October 2025, 16:54 by Oatmeal
Updated rules (thanks corey)
on 13. October 2025, 16:35 by coreydixon
Very smooth solve path. Super fiun!
BTW - the Renban rules are missing from the rule-set.
on 13. October 2025, 11:14 by Ndstripes
Lovely short and fun puzzle, I always enjoy the portal rule