Upstream
(Eingestellt am 11. Mai 2022, 23:05 Uhr von EricRathbun)
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Normal Sudoku rules apply.
- Normal Killer Cage rules apply.
- Digits separated by a white dot have a difference of one while digits separated by a black dot are in a 1:2 ratio. Not all dots are given.
- The gray lines are palindromes. They read the same frontwards and backwards.
- Knight's Restraint - digits separated by a knight's move (in chess) cannot repeat.
The puzzle can be played here:
Sudoku Pad
f-puzzles
Hope you enjoy the puzzle. Comments appreciated.

Lösungscode: Top Row
Zuletzt geändert am 23. Februar 2026, 02:29 Uhr
Gelöst von SKORP17, GertVonnegut, by81996672, Gullie, jalebc, Isa, Statistica, kublai, henter, ___, AN_not_IO, AvonD, PinkNickels, atomium, amirbeirat, ashwin, farodin64, terrible_casserole, ForzaFcu, ... Colonel, cbjenkins, rcg, ManuH, PippoForte, Uhu, cdwg2000, Just me, Crul, bolado, zrbakhtiar, Megalobrainiac, dingledork, asii, apendleton, Bobbobert, finger, Carolin, snuuba, quinnikins
Kommentare
am 23. Februar 2026, 02:29 Uhr von EricRathbun
added link
Zuletzt geändert am 23. Februar 2026, 02:31 Uhram 22. Februar 2026, 18:46 Uhr von snuuba
Maybe I am little slow today, but this felt harder than 2 stars. Great puzzle, many thanks.
CtC link:
https://sudokupad.app/ignqoxx2yy
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Response from Eric: When I created it, I thought it was more of a three-star puzzle, but based on everyone who solved it, I guess it is a two-star.
am 18. Mai 2022, 00:05 Uhr von sacklunch
Great puzzle, interesting logical path to follow. Thanks!
Zuletzt geändert am 12. Mai 2022, 14:23 Uhram 12. Mai 2022, 12:33 Uhr von Gullie
Loved the linear solve path! Thanks for setting.
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Response from Eric: You're welcome. Glad you enjoyed it Gullie.