Aura

(Published yesterday, 20:41 by Gerhard1963)

Aura

Here is my third quartet lines puzzle. This is my best one so far, I'd say.

Rules:

Standard sudoku rules apply: The digits 1 through 9 appear in every row, column, and box.

Quartet Lines: Red lines may have no more than 4 different digits.

Cages: Digits in cages cannot repeat and must sum to the value shown in the upper left corner of the cage.

SudokuPad
My Puzzle Catalogue

Solution code: The digits on the positive diagonal (from bottom left to top right).

Solved by Harold, Duarte-Carvalho, jalebc, SKORP17, ludvigr04, NorthCoastAsher, forsen, OutOfMyMindBRB, josemadre, Gnubeutel, trencaclosques, maniacaljackal, Testpilot Pirx, Debba, e5ten, Kigor, DeckersYay, ... luisdcnt, teuthida, ATBlanchard, naggy, beano, sujoyku, Chiefredhawk, Dermerlin, Debrutsid, pepu273, jordanza, Crul, Sudokode, oezi, apendleton, me and the paws, rstarks, PURB97, AN_not_IO

Full list