by LilGungaJr·Published 05/14/2026, 05:53:20 AM
Sudoku
Each row, column, and region must contain the digits 1-9 once each.
German Whisper Lines
Adjacent cells along a German Whisper Line must differ by at least 5.
Dutch Whisper Lines
Adjacent cells along a Dutch Whisper Line must differ by at least 4.
Renban Lines
Cells along a Renban Line form a set of consecutive digits in any order, without repeats.
Region Sum Lines
Segments in each region along a Region Sum Line must sum to the same total. Separate visits to the same region are counted as separate segments.
Entropy Lines
Every set of 3 consecutive cells along an Entropy Line must contain a low digit (1,2,3), a medium digit (4,5,6), and a high digit (7,8,9).
Ratio Kropki Dots
Cells separated by a Ratio Kropki dot must have a ratio of 1 to 2. Not all dots are necessarily given.
Difference Kropki Dots
Cells separated by a Difference Kropki dot must differ by 1. Not all dots are necessarily given.
Ambiguous Kropki Dots
Cells separated by an Ambiguous Kropki dot must either differ by 1 (like a difference kropki dot) or have a ratio of 2 (like a ratio kropki dot). Not all dots are necessarily given.
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