Renban lines: Digits along a purple line are consecutive, but can be written in any order.
Thermometer: Digits along a thermometer increase from the bulb.
Killer cage: The sum of the digits in the cage is equal to the value in the upper left-hand corner.
Quads: The digits in the circled quads must appear at least once in the surrounding 4 squares.
Maximal square: The center square (with > signs) is greater than all of the adjacent 4 squares.
Solution code: row 5
on 17. January 2026, 22:46 by Inge
That was fun. Thank you
on 17. January 2026, 20:58 by Exigus
Ice puzzle with a great presentation. Thanks!
on 17. January 2026, 17:47 by mbumbee
Changed it to 3 stars :)
on 17. January 2026, 17:45 by Marshal on Mars
I'm going out on a limb to say this is either not 2-star difficulty, it's missing clues, or it' missing other rules.