by Vithuran·Published 07/03/2026, 07:18:23 PM
Sudoku
Each row, column, and region must contain the digits 1-9 once each.
Parity Lines
Every set of 2 consecutive cells along a Parity Line must contain one even digit (2,4,6,8) and one odd digit (1,3,5,7,9).
Thermometers
Digits along a Thermometer must increase as they move away from the bulb.
Anti-King
Cells separated by a king's move in chess cannot contain the same digit.
Counting Circles
A digit on a circle indicates the number of circles containing that digit.
Positive Diagonals
Digits cannot repeat along positive diagonals.
Ratio Kropki Dots
Cells separated by a Ratio Kropki dot must have a ratio of 1 to 2.