Thermometer arrows
(Published on 7. July 2026, 10:23 by Lithium-Ion)
Normal sudoku rules apply. A digit in a cell with an arrow equals the maximum length of a straight thermometer that can be placed in the direction of the arrow, where the bulb of the thermometer is contained in the cell the arrow is directly pointing to. Digits along a thermometer must strictly increase from the bulb end. Thermometers with length one are allowed. If an arrow is pointing to 25618 (where 2 is closest to the arrow), then digit in the arrow cell is 3 since the longest increasing sequence is 256.
You can play this puzzle via the following link: https://sudokupad.app/1t2rcdhbqe
Solution code: The digits in row 9, read from left to right.
Comments
on 9. July 2026, 18:46 by galium_odoratum
Very fun puzzle, more like a 1*. If you are reading this comment before solving, be warned, right now there is a visible spoiler in the comment below.
on 9. July 2026, 07:09 by VitP
the main difficulty here is understanding the rules. because they are unique and strange, level 1 is excluded.
the second difficulty is creating a notation SYSTEM.
turns out, the rest is very easy.
the sting in the tail is resolved due to the NEGATIVE constraint.
on 8. July 2026, 00:07 by firespire
Really liked it so I breezed through it like a 1 star puzzle.
on 7. July 2026, 18:52 by Fizz
That was fun and very clever, thanks a lot!
on 7. July 2026, 18:11 by gmart
Love it
on 7. July 2026, 14:24 by wuc
Cool refreshing rules used excellently. Great setting thx.
on 7. July 2026, 14:22 by wuc
Cool refreshing rules used excellently. Great setting thx.
on 7. July 2026, 12:59 by CortexVortex
Wonderful puzzle, it made me feel clever in solving it.
on 7. July 2026, 10:49 by RailMan
That was a lot of fun. Thank you for sharing it.
