ICELAND
(Published on 20. September 2026, 10:21 by Zinker)
This is Iceland with volcanos, geysers, waterfalls and the Vatnajökull glacier.
The normal Sudoku rules apply: in each row, each column, and each bold-outlined 3x3 box, the digits 1–9 must each appear exactly once.
Additionally:
Coast (green line): Adjacent digits along the green coastline differ by at least 5.
Volcanoes (red dots): Around a volcano there are always two pairs of identical digits in a cross formation (e.g., 4 4 and 9 9).
Waterfalls (yellow dots): Around a waterfall, all surrounding digits are either all even or all odd.
Geysers (black dots): Cells connected by a geyser have a 1:2 ratio.
Vatnajökull glacier: Digits in the cages sum up to the given number.
F-Puzzles:
LinkSudokupad:
LinkSolution code: Row 8
Comments
on 23. September 2026, 08:58 by DocLogic
great puzzle, very nice interaction between the elements!
on 20. September 2026, 20:02 by LARSPARIS
Mycket trevligt possle fran ett nordiskt land. Tack.
on 20. September 2026, 18:41 by YoBuggered
This puzzle was... ice cold!
A great challenge for me thoroughly enjoyed it. Thank you!
on 20. September 2026, 17:34 by Franjo
Thank you very much for creating and sharing this beautiful geography puzzle. (I only wonder why you didn’t close the coast line?)
on 20. September 2026, 17:23 by farodin64
Sehr schönes Puzzle, erinnert mich an meine eigenen geographischen Puzzles von deutschen Bundesländern, die ich früher mal gemacht habe. Danke für den Spaß!
on 20. September 2026, 16:06 by aldango
Lovely puzzle, great interactions! Thank you
on 20. September 2026, 11:11 by falcoo
what a fun puzzle! I looked up a map of iceland and I see that the elements you added correspond more or less to actual geographical features. What a fun and creative idea!
