Yin Yang Boulder
(Published on 19. September 2026, 13:58 by Vythic)
Play on SudokuPad!
Normal sudoku rules apply.
Cageless Yin Yang: Shade some cells such that all shaded cells are orthogonally connected, all unshaded cells are orthogonally connected, and no 2x2 cluster of cells is entirely shaded or unshaded. Cells in a cage do not count as shaded or unshaded.
Secret Summit: Digits orthogonally along shaded cells must be ascending or descending, with 1 and 9 reversing the direction. Digits along unshaded cells must do the same.
Thermometers: Cells on a thermometer are either all shaded or all unshaded. Digits along a thermometer increase from the bulb.
Killer Cages: Digits in a cage sum to the number in the top-left of the cage.
Normal sudoku rules apply.
Cageless Yin Yang: Shade some cells such that all shaded cells are orthogonally connected, all unshaded cells are orthogonally connected, and no 2x2 cluster of cells is entirely shaded or unshaded. Cells in a cage do not count as shaded or unshaded.
Secret Summit: Digits orthogonally along shaded cells must be ascending or descending, with 1 and 9 reversing the direction. Digits along unshaded cells must do the same.
Thermometers: Cells on a thermometer are either all shaded or all unshaded. Digits along a thermometer increase from the bulb.
Killer Cages: Digits in a cage sum to the number in the top-left of the cage.
Solution code: Column 5, from top to bottom, with a "+" between digits that differ in being shaded/unshaded.
Last changed on on 21. September 2026, 16:48
Solved by Piff, QuiltyAsCharged, Joyofrandomness, pmays123, Laake, karlmortenlunna, amirs, PippoForte, Jesper, SnapDragon, WvdWest, Malakree
Comments
on 20. September 2026, 17:25 by amirs
Very interesting and challenging puzzle. 4* for me
on 19. September 2026, 22:55 by pmays123
A bit tricky to begin but very fun to finish. I really enjoyed it on my second solve too. Thanks for sharing :)
on 19. September 2026, 19:43 by QuiltyAsCharged
That was challenging and really good! I thought I was getting a handle on the secret summit rule, but this puzzle had my head spinning
