Upstream
(Published on 11. May 2022, 23:05 by EricRathbun)
- 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:
Hope you enjoy the puzzle. Comments appreciated.
Solution code: Top Row
Last changed on on 23. February 2026, 02:29
Solved by SKORP17, GertVonnegut, by81996672, Gullie, jalebc, Isa, Statistica, kublai, henter, ___, AN_not_IO, AvonD, PinkNickels, atomium, amirbeirat, ashwin, farodin64, terrible_casserole, ForzaFcu, ... ManuH, PippoForte, Uhu, cdwg2000, Just me, Crul, bolado, zrbakhtiar, Megalobrainiac, dingledork, asii, apendleton, Bobbobert, finger, Carolin, snuuba, quinnikins, MysticMan, paintspotinfez, kangaroo
Comments
on 23. February 2026, 02:29 by EricRathbun
added link
Last changed on 23. February 2026, 02:31
on 22. February 2026, 18:46 by 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.
on 18. May 2022, 00:05 by sacklunch
Great puzzle, interesting logical path to follow. Thanks!
Last changed on 12. May 2022, 14:23
on 12. May 2022, 12:33 by Gullie
Loved the linear solve path! Thanks for setting.
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Response from Eric: You're welcome. Glad you enjoyed it Gullie.
