The Hourglass
(Published on 1. September 2026, 18:20 by gkammer)
Rules:
- Standard sudoku rules apply.
- Antiknight: cells a knight's move away cannot contain the same digit.
- Parity lines: Adjacent cells along a red line must alternate parity (odd vs even).
- Thermometers: Digits along a thermometer strictly increase from the bulb to the tip.
- Arrows: Digits along an arrow sum to the digit in the attached circle.
- Kropki dots: Digits in cells joined by a black dot are in a 1:2 ratio. Not all dots are necessarily given.
Play on sudokupad here: https://sudokupad.app/psfjq98jp9
Solution code: Top row, left to right.
Solved by sanabas, jalebc, SKORP17, onlainari, bansalsaab, pmays123, cryptique, Bjd, kangaroo, Snookerfan, Arheus, Berkals, sarabtx, by81996672, PierreTombal, mz32, Noa, Chelo
Comments
on 2. September 2026, 12:38 by Snookerfan
Very nice and very hard, thanks for the challenge!
on 1. September 2026, 22:51 by onlainari
Amazing how powerful anti knight can be to make a unique solution. And I love colouring in.
