Positive Diagonals

(Published on 18. June 2025, 08:32 by lcy.30)

Normal Sudoku rules apply. (Put digits 1 to 9 in every row, column and 3x3 box.)

Thermometers: Digits strictly increase along a thermometer, starting from the bulb.

Try the puzzle on the SudokuPad app by Sven Neumann.

Hint: Box 7, Box 5, and Box 2 are the most constrained boxes. During the middle of the solve, the R9C1-R4C6 thermometer has two possible fills, which, along with R9C5, limits the possibilities for other cells.

Solution code: Column 9, from top to bottom.

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Solved by SincereEngineer, drbs, kkli, Fisherman, dianogah, tgstar, jalebc, MAWA, fuxia, WarriorKitten, Megalobrainiac, SKORP17, PinkNickels, Ragna, flipping, Arlo Lipof, addie, weiken, zuzanina, Corey115, ... hamstersudoku, Bjd, AN_not_IO, Toppastala, paranoid, Nagesh, chis_r, bhambells, timww572, AAABatts, Crul, Kirra, Krisonium, zrbakhtiar, krzysztof.kiemel, Montikulum, NeroChaos, pepe74287, Kigor

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