Clueless Fog DG
(Published on 20. March 2026, 18:40 by AlfSmith)
• Normal Sudoku rules apply.
• Solving a cell clears any fog from its immediate vicinity.
• Disjoint Groups: Cells with the same position within the boxes contain all the numbers 1 to 9.
• A gold cell contains its position within its row, column or box. Position is read from left to right, top to bottom. All possible gold cells are given.
Solution code: row seven
Comments
on 21. March 2026, 10:11 by xiaoji
Disjoint group fits well with gold cell (negative constraint) !
on 20. March 2026, 23:58 by marajade
I really enjoyed this; what a fascinating constraint!
on 20. March 2026, 19:38 by Myfyr MJ
Very nice, disjoint not my favourite rule set, but got there in about 21 minutes!
on 20. March 2026, 19:22 by irobird
The gold cell constraint is so fun... please keep making these. Thank you!
