Star Regions
(Published on 30. April 2025, 07:02 by Md88keys)
by Md88keys
Play in Sudokupad
Place the digits 1-9 in each row and column.
There are nine star cells in the puzzle, one in each row and column. Each star is a different digit and is a knight's move away from exactly two neighboring stars. The stars create a constellation with 180* rotational symetry around the center star, which is the digit 5. The smallest star is marked by a diamond shape.
A star cell and the cells which touch that star may not include repeating digits. (9, 6, or 4 cell regions.)
Given digits are not stars.
This puzzle was inspired by 9-Center Regions by qyc. I thought it was an amazing puzzle and wanted to try using the center regions idea, with a different break-in.
Solution code: Row 9
Comments
on 3. May 2025, 16:49 by Md88keys
Major rules revision to make it easier to understand.
The puzzle was not changed, but there are a few additional steps to the solve.
on 2. May 2025, 23:46 by adelaide
fun and simple puzzle once i understood the ruleset, but the rules confused me -- the 4/6/9 boxes could be simplified to 9 excluding cells out of grid; the overlapping lines rule doesn't seem to be necessary and just added to my confusion
on 30. April 2025, 15:34 by Md88keys
Rules clarification
on 30. April 2025, 15:29 by Md88keys
Added rule examples and changed tag
on 30. April 2025, 15:07 by Md88keys
Fixed title typo
on 30. April 2025, 07:21 by marcmees
(Invisible arrows ???) + Place the digits 1-9 in a constellation of nine cells (stars) which form a region + The constellation has 180* rotational symetry around a center star + The shape of the constellation is a simple line ... I am trying to visualise all this but failed.
