Quadtropy
(Published on 25. September 2026, 15:21 by Mad-Tyas)
Every now and then, it feels right, as the inventor of this variant, to publish another Entropy Sudoku. I hadn’t done a quadruple entropy Sudoku before, so here’s this puzzle.
Rules:
Sudoku on:
SudokuPad
Rules:
Sudoku: Fill every row, column and marked 3x3 box with the digits 1-9.
Quadruple: Digits in a white circle must appear in the four surrounding cells.
Entropy: Each 2x2 box in the grid has to contain a low digit (1, 2, 3), a middle digit (4, 5, 6) and a high digit (7, 8, 9).
Have fun solving!
Solution code: Digits in in row 9 (left-to-right).
Solved by Blake Saligia, jalebc, MartinR, tryote, SKORP17, Bjd, palletpusher, by81996672, apendleton, apothycus, NeroChaos, flipout, jadezki, ManlyPebbles, katze, hanna_werner, Exigus, kima2008, shteev, SamWHE
Comments
on 26. September 2026, 03:49 by palletpusher
Delightful puzzle which I found very tough to crack. Held on till the end. Excellent construction, Mad-Tyas. Thank you for sharing!
