Yin-Yang Under The Microscope
(Published on 26. September 2026, 04:43 by sanabas)
You can attempt this puzzle at this sudokupad link
Good Luck!
Questions, comments, feedback are always welcome, either here or on the CTC community discord.
The rules:
The puzzle is split into four 6x6 sudoku grids. On each grid, normal 6x6 Sudoku rules apply: Place the digits 1-6 exactly once in every row, column, and 2x3 box.
Yin-Yang: Shade some cells such that all shaded cells are orthogonally connected, all unshaded cells are orthogonally connected, and no 2x2 area is fully shaded or unshaded.
IMPORTANT: ***Each of the four 6x6 grids is a valid yin-yang on its own, and the entire 13x13 grid is also a valid yin-yang.***
6x6 Whisper Lines: Solid green lines in the grid are whisper lines. Adjacent digits along a line must have a difference of at least 3. On each whisper line, all low digits (123) are shaded, all high digits (456) are unshaded.
Sum Lines: On each hollow blue line, the sum of shaded cells is equal to the sum of unshaded cells.
Skyscrapers: Digits in the 6x6 grids represent skyscrapers, with their values corresponding to their heights. Taller skyscrapers obscure all shorter skyscrapers behind them. Arrows in between the 6x6 grids indicate the number of skyscrapers that can be seen in that row/column, looking in the direction of the arrow. Values of arrows must be determined by the solver.
Note: Solution check expects the cells with arrows to be filled, and all other cells between the grids to have no digits entered.
Some of my previous puzzles:
Jailbreak
The Earl and The Count
+/- x
If you enjoy this one, please try them too.
Good Luck!
Questions, comments, feedback are always welcome, either here or on the CTC community discord.
The rules:
The puzzle is split into four 6x6 sudoku grids. On each grid, normal 6x6 Sudoku rules apply: Place the digits 1-6 exactly once in every row, column, and 2x3 box.
Yin-Yang: Shade some cells such that all shaded cells are orthogonally connected, all unshaded cells are orthogonally connected, and no 2x2 area is fully shaded or unshaded.
IMPORTANT: ***Each of the four 6x6 grids is a valid yin-yang on its own, and the entire 13x13 grid is also a valid yin-yang.***
6x6 Whisper Lines: Solid green lines in the grid are whisper lines. Adjacent digits along a line must have a difference of at least 3. On each whisper line, all low digits (123) are shaded, all high digits (456) are unshaded.
Sum Lines: On each hollow blue line, the sum of shaded cells is equal to the sum of unshaded cells.
Skyscrapers: Digits in the 6x6 grids represent skyscrapers, with their values corresponding to their heights. Taller skyscrapers obscure all shorter skyscrapers behind them. Arrows in between the 6x6 grids indicate the number of skyscrapers that can be seen in that row/column, looking in the direction of the arrow. Values of arrows must be determined by the solver.
Note: Solution check expects the cells with arrows to be filled, and all other cells between the grids to have no digits entered.
Some of my previous puzzles:
Jailbreak
The Earl and The Count
+/- x
If you enjoy this one, please try them too.
Solution code: The shaded digits in r2, followed by the shaded digits in r9.
Solved by isajo4002, sehringdipity, TVDK, gdc, Piff, 3ColorTheorem, zeniko, beansontoast_, by81996672, whtshername, palpot, gladstone, meeeteor, OJPS, misko, lmdemasi, MagnusJosefsson, Miatc, pmatos, Kpn, dogfarts, Tompzini, irq, ThomasR, Jesper, EveDeryn, 72kchunshuai, elpadrinoIV
Comments
on 28. September 2026, 14:21 by lmdemasi
Really loved the idea of having all 5 grids satisfy YY at the same time!
on 26. September 2026, 19:10 by zeniko
Nice, quite subtle interactions across the four grids. Thanks for sharing.
