Perfectly Balanced Killers
(Published on 2. May 2026, 07:21 by PjoeterBliep)
Normal sudoku rules apply: Place the digits 1-9 once each in every row, column and 3×3 box.
Yin-Yang: Shade some cells in the grid so that all shaded cells are orthogonally connected, all unshaded cells are orthogonally connected, and no 2×2 region is entirely shaded or entirely unshaded.
Values: A shaded cell containing digit x has value -x; an unshaded cell containing digit x has value x. In other words, shaded cells have negative values, and unshaded cells have positive values.
Killer Cages: Digits in a cage do not repeat and their values sum to the total given.
Solution code: Unshaded digits in row 7, left to right.
Comments
on 12. May 2026, 17:50 by Firebird
Wonderful!
on 6. May 2026, 08:56 by Chaka
Brillant!
on 4. May 2026, 18:05 by orsonwu840
I enjoyed it thoroughly!
on 4. May 2026, 16:20 by orsonwu840
I enjoyed it thoroughly!
on 4. May 2026, 00:01 by VitP
only 24 solves ? level 4 ?
INCONCEIVABLE.
THIS is what you need to know to solve this puzzle:
some cells are GREEN. green is good. a digit in a green cell is exactly what it looks like.
some cells are RED. red means danger. a digit in a red cell is the OPPOSITE of what it claims to be.
and those rules are important, and have nothing to do with chocolate or tea.
then all you need to know are the basic yin/yang rules, and basic addition, and basic sudoku.
so it's level 2.5.
on 3. May 2026, 14:14 by Exigus
Superb. A bit of maths required but not too hard. Thanks!
on 3. May 2026, 04:30 by Crusader175
Very nice!
on 2. May 2026, 21:50 by SennyK
Wonderful puzzle, great execution, very enjoyable to solve! :-)
on 2. May 2026, 10:29 by Snookerfan
Brilliant puzzle! I especially liked the ending. Thanks
on 2. May 2026, 09:04 by Nell Gwyn
I'm proud to have been the inaugural solve of this!
