Four By Four
(Eingestellt am 29. Februar 2024, 17:13 Uhr von IcyFruit)
Normal sudoku rules apply.
Shade some tetrominoes (groups of 4 orthogonally connected cells) such that no two tetrominoes are orthogonally or diagonally adjacent, all unshaded cells form a single orthogonally connected region, and no 2x2 square of cells is entirely unshaded.
Clues in a circle indicate the values of all shaded digits in the 4 cells surrounding the clue. Each question mark represents a single digit, which must be unique within that circle.
Adjacent unshaded digits differ by at least 4.
Lösungscode: Columns 4 and 9
Kommentare
am 11. März 2024, 00:27 Uhr von yttrio
Very fun puzzle! Both the shaded cell and unshaded cell logic required were great!
am 3. März 2024, 13:53 Uhr von henrypijames
The rules state that every question mark represent a single unique digit, but don't say if non-question-marks do the same. For instance, may the single 5 in a circle represent two different shaded 5s in that quad?
Suggested rephrasing:
Within every circle, each digit (including ones represented as ?) is unique and corresponds to a single shaded cell touched by the circle.
am 1. März 2024, 13:20 Uhr von samuel1997
Absolutely brilliant!
I somehow brook the puzzle though by misunderstanding the rule that I thought the digit in circle must be shaded and must be the only digit surround the circle. But after that the puzzle went on well.
am 1. März 2024, 09:52 Uhr von Playmaker6174
A fascinating rule set that provides some cool yet unusual sudoku deductions.
Wouldn’t really say it’s so smooth overall because there’re couples of points in the middle where I had to ask proper questions about the unshaded cells, but it was still pleasant to solve till the end :)
am 29. Februar 2024, 19:00 Uhr von glum_hippo
Very enjoyable, and inspiring too
am 29. Februar 2024, 18:22 Uhr von goodcity
Loved the puzzle and the ruleset ! The solve felt so smooth, I am not sure about the stated difficulty. Anyway thank you for setting and sharing :)
