Double Counting
(Eingestellt am 17. Dezember 2025, 20:46 Uhr von ralphwaldo1)
Composed for Scojo's prompt for extra regions.
The idea (and the diamonds) come from this problem from MathGuy_12
Normal Sudoku rules: Place a digit from 1-8 in each cell such that there are no repeats within any row, column or box.
Yin Yang: shade some cells so that all shaded cells are orthogonally connected, all unshaded cells are orthogonally connected, and every 2x2 contains at least one of each.
The value of a shaded cell is double that of its digit, and the value of an unshaded cell is its digit.
Diamonds and Circles: Values in ALL shapes count the number of cells seen orthogonally sharing the same shading as the cell (including the cell itself; the view interrupted by opposite shading).
Extra regions: digits in both Diamonds and Large Circles are set of 1-8. (Small circles may repeat).
Lösungscode: Unshaded cells in row 4 and row 5
Zuletzt geändert am 29. Januar 2026, 01:00 Uhr
Gelöst von aqjhs, Scojo, Alce, Elker, Altynbek , jkuo7, monaters, karlmortenlunna, PuzzBmcg, WvdWest
Kommentare
am 29. Januar 2026, 01:00 Uhr von ralphwaldo1
rule clarification
Zuletzt geändert am 23. Januar 2026, 14:31 Uhr
am 29. Dezember 2025, 02:12 Uhr von PuzzBmcg
Is something missing from the rules? What are the small circles for?
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bellal: Small circles also count shaded/unshaded, but aren't an extra set and may repeat
