Roman Fortress Loop
(Published on 11. July 2026, 01:00 by yttrio)
Rules:
Normal Sudoku rules apply.
Draw a one-cell-wide loop of orthogonally connected cells. The loop may not touch itself, not even diagonally.
Cells on the loop act as fortress (maximum) cells: cells on the loop must be larger than all orthogonal neighbors of the cell that are not on the loop.
XV: Digits separated by an X must sum to 10. Digits separated by a V must sum to 5. Not all possible Xs and Vs are necessarily given.
For each X and V, at least one of the digits touching the X or V must be on the loop.
Solution code: Digits on the loop in row 3 (left to right) followed by digits on the loop in row 7 (left to right)
Comments
on 14. July 2026, 18:07 by blackjackfitz
Huzzah!
on 11. July 2026, 19:35 by Exigus
Another great loop. Thanks!
on 11. July 2026, 19:19 by rojspencer
Fantastic!
on 11. July 2026, 16:58 by jhuijts
Very nice setting and fun to find the loop!
on 11. July 2026, 14:29 by pmays123
Very fun. Thanks for sharing this wonderful puzzle!
on 11. July 2026, 13:56 by Franjo
Yeah, the Loopmaster did it again! Thank you very much for creating and sharing another one of your beautiful puzzles. So satisfying.
on 11. July 2026, 11:19 by Snookerfan
Thanks for another gem!
on 11. July 2026, 08:10 by Piatato
Great fun, thanks!
on 11. July 2026, 03:51 by philolologue
I'm at a total loss how to break into this one, needs a CtC feature!
on 11. July 2026, 02:38 by beansontoast_
Beautiful as ever.
