Train Station
Rules:
1. Normal sudoku rules apply
2. Irregular regions, one of them scattered (Irregular)
3. Cells separated by a black dot have a ratio of 1:2. Cells separated by a white dot have a difference of 1. Not all dots are given (Kropki Pairs)
Solution code: Row 9 + Column 7 (18 digits)
on 19. December 2021, 23:54 by tallcat
Irregular is really not my best so i found this very hard to get going - although I picked up steam as I went. Clever stuff, all the same!
on 19. December 2021, 05:37 by glum_hippo
Very elegant. Choo choo!!