![GC8HTMQ Sudoku-Challenge #5 Ordnungssudoku (Unknown Cache) in Zürich, Switzerland created by Doctor Strangelove GC8HTMQ Sudoku-Challenge #5 Ordnungssudoku (Unknown Cache) in Zürich, Switzerland created by Doctor Strangelove](https://img.geocaching.com/cache/large/035c1a74-8a2a-4eca-9189-f18e5c509286.png?rnd=0.4663096)
GC8HTMQ Sudoku-Challenge #5 Ordnungssudoku (Unknown Cache) in Zürich, Switzerland created by Doctor Strangelove
![GC8HQFW Sudoku-Challenge #2 Weisse-Springer-Sudoku (Unknown Cache) in Zürich, Switzerland created by Doctor Strangelove GC8HQFW Sudoku-Challenge #2 Weisse-Springer-Sudoku (Unknown Cache) in Zürich, Switzerland created by Doctor Strangelove](https://img.geocaching.com/cache/large/b1436093-8219-4ed1-b6e4-463cd02eb8d7.png?rnd=0.6272045)
GC8HQFW Sudoku-Challenge #2 Weisse-Springer-Sudoku (Unknown Cache) in Zürich, Switzerland created by Doctor Strangelove
![GC8HE19 Sudoku-Challenge #1 Domino-Sudoku (Unknown Cache) in Zürich, Switzerland created by Doctor Strangelove GC8HE19 Sudoku-Challenge #1 Domino-Sudoku (Unknown Cache) in Zürich, Switzerland created by Doctor Strangelove](https://img.geocaching.com/cache/large/38309de8-53ec-416d-a44c-198d48049bda.png?rnd=0.01071668)
GC8HE19 Sudoku-Challenge #1 Domino-Sudoku (Unknown Cache) in Zürich, Switzerland created by Doctor Strangelove
![GC8HYAV Sudoku Challenge #14 Gerades Bimaru-Sudoku (Unknown Cache) in Zürich, Switzerland created by Doctor Strangelove GC8HYAV Sudoku Challenge #14 Gerades Bimaru-Sudoku (Unknown Cache) in Zürich, Switzerland created by Doctor Strangelove](https://img.geocaching.com/cache/large/65fcabb9-5647-4746-bab0-e5df8acb2086.png?rnd=0.1376778)