Summetry
(Eingestellt am 15. Juli 2026, 15:34 Uhr von Kaktuslav)
Rules: Normal sudoku rules apply.
Centrally symmetric 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. The shading must also be centrally symmetric: cells mapped to each other by a 180∘ rotation about the center of the grid have the same shading.
Cages: Digits may not repeat within a cage. Each cage contains at least one shaded and one unshaded cell, and the sum of its unshaded digits equals the product of its shaded digits (a sum or product consisting of a single digit is simply that digit).
Lösungscode: Unshaded digits in row 5 followed by shaded digits in row 7
Kommentare
am 16. August 2026, 01:14 Uhr von koXx
Brilliant interactions of the different rules! An absolute banger of a puzzle!
am 15. August 2026, 23:57 Uhr von WildEnte
Made it before midnight. On Day 6 :-)
am 22. Juli 2026, 14:59 Uhr von PatternSpren
What a puzzle! Took me ages to solve but very nice.
am 21. Juli 2026, 01:47 Uhr von pmays123
Elegant. Thank you
am 18. Juli 2026, 18:07 Uhr von Exigus
Amazing yin-yang, some really nice deductions to be had. Thanks!
am 17. Juli 2026, 17:40 Uhr von Djirt
Спасибо, настоящая жемчужина!)
am 17. Juli 2026, 16:15 Uhr von kasperd
This one was only three stars of difficulty for me. I really liked how these rules interacted.
am 17. Juli 2026, 15:44 Uhr von louis0
Found this one very hard but very enjoyable, probably 5* by my standards. Instincts were correct with starting off shading but found it very hard to prove, missing the key deduction for some time. Then slow but steady sudoku after that.
am 17. Juli 2026, 12:39 Uhr von SennyK
What a wonderful construction! :-)
am 16. Juli 2026, 17:00 Uhr von Qodec
Incredibly engaging, top class break-in, and so beautiful! What more could anyone possibly want?
am 16. Juli 2026, 16:02 Uhr von vukkarak
Really nice, both the shading and the sudoku part!
am 16. Juli 2026, 14:59 Uhr von Major314
Favorite puzzle in quite a while, the logic needed for the break in is astonishing !
am 16. Juli 2026, 13:08 Uhr von Franjo
Thank you very much for creating and sharing another brilliant puzzle. Made my day!
am 16. Juli 2026, 10:39 Uhr von amirs
Lovely challenging puzzle. It took me some time to realize how powerful the effects of the symmetry are.
am 15. Juli 2026, 20:39 Uhr von Myxo
Lovely!
am 15. Juli 2026, 20:01 Uhr von Snookerfan
Very tough nut to crack, probably missed something profound beyond the logic I discovered. Thanks for the challenge
