Batteries
(Published on 21. September 2026, 12:06 by TripleABattery)
Sudoku: Place the digits 1-9 once each into every row, column and 3x3 box.
Region Sum Lines: Box borders divide blue lines into segments, whose digits have the same sum. Different lines may have different segment sums.
German Whispers: Adjacent digits along a green line must differ by at least 5.
Dutch Whispers: Adjacent digits along an orange line must differ by at least 4.
Black Kropki: Black dots separate digits where one is double the other. Not all dots are necessarily given.
Asymmetry: If two adjacent cells contain consecutive digits, then the cells that are in the 180° rotationally symmetric positions may not be consecutive. (For example, if r1c1 and r1c2 are consecutive, then r9c9 and r9c8 are not.)
The grey line is purely cosmetic.
Solution code: The 9 digits along the diagonal from r1c1 (top left) to r9c9 (bottom right), without spaces.
