Smaller Territories
(Published on 19. February 2026, 07:40 by masetab)
Play the sudoku here: If you haven't already you may also want to check out the 5x5 puzzle I posted yesterday with the same ruleset which can act as a warm-up or snack if you want something easier to get familiar with the rules:
Rules:
Sudoku: Fill the grid with digits 1–9 so that each digit appears exactly once in every row and column.
Regions: Divide the grid into regions of orthogonally connected cells such that every cell belongs to a region. Each region contains exactly one circle. The digit in a circle gives the size of its region. Digits may not repeat within a region.
If a circle contains digit n then exactly n-1 orthogonally adjacent regions (regions sharing an edge) must be smaller in size than that region.
Cells separated by a blue dot must belong to different regions.
View my puzzles from the Territories series:
- Consecutive Territories - Featured on CTC! (5/5 Difficulty):
Solve on Logic Masters - Non-Consecutive Territories - Featured on CTC! (5/5 Difficulty):
Solve on Logic Masters - Square Territories (5/5 Difficulty):
Solve on Logic Masters - Yin-Yang Territories (5/5 Difficulty):
Solve on Logic Masters - Counting Territories (4/5 Difficulty):
Solve on Logic Masters - Loopy Territories (5/5 Difficulty):
Solve on Logic Masters
Any feedback is welcomed!
Solution code: Digits in odd-sized regions in row 6 from left to right.
Comments
on 28. February 2026, 13:55 by Chilly
That was tricky. Especially the regions, for me. But very nice, and original.
on 27. February 2026, 08:01 by Schatzmeister
Lovely puzzle with really nice logic, as usual. It flowed very well for me, only filling in the grid after fully pencil marking took surprisingly long.
on 26. February 2026, 00:56 by nearestneighbour
That was a lot of fun. The regions were tough but the real horror started with the numbers IMO
on 19. February 2026, 18:52 by Fool on Hill
Nice puzzle - it definitely helped to have done the example first to get my head round the rules.
on 19. February 2026, 12:49 by Snookerfan
Very nice and fun puzzle! Thanks
