Sudoku Variants Series (017) - No three odd/even in line
(Published on 25. March 2014, 00:00 by Richard)
No three odd/even in line
Solve online in F-Puzzles (thanks Nick Smirnov!)
Place the digits from 1 tot 9 in every row, column and 3x3-block. The maximum number of neighbouring odd digits as well as the maximum number of neighbouring even digits in any row or column is two.
Solution code: Column 3, followed by column 7.
Comments
on 26. November 2023, 02:24 by cascadeshiker
Very nice variant. An enjoyable solve. Thanks.
on 25. May 2023, 04:27 by csearles
Even though I found the first digit with the logic mentioned in your hidden comment, this was still very hard since I couldn't find any other strat after the first digit and had to use the Nishio tactic until a contradiciton arised for one digit at almost the full puzzle (trial and error in the head basically which is nuts). Luckily for me it worked but it still took a lot of time. If you have any more strats after the first digit placed that you mentioned, please let me know.
---
Reply: colouring or marking is very helpful in sudokus with odd/even restrictions. Without knowing whether R3C1 is 4 or 8, you know it must be even. By marking all cells in the grid with two different colours for odd or even, you might spot possibilities earlier.
on 23. November 2021, 19:45 by Richard
Added link for online solving. Thx Nick!
on 2. December 2020, 00:32 by Nick Smirnov
F-puzzles:
https://f-puzzles.com/?id=yydcxydg
on 25. March 2014, 18:27 by pin7guin
Hat mir gut gefallen!
on 25. March 2014, 14:30 by Statistica
@Richard: Thanks for the link. In fact I haven't done this one (even I had, i'm not sure if I would remember it (problem of aging...)) ;-)
on 25. March 2014, 13:09 by tuace
Fand ich klasse!
on 25. March 2014, 12:58 by Eisbär
This was fun! Solved it while enjoying my lunch
:-D
on 25. March 2014, 11:29 by Richard
Added a link to another one of this type.
on 25. March 2014, 11:27 by Richard
@Statistica: then there is another one for you. Advent puzzle number 15. I will add a link to it.
on 25. March 2014, 11:13 by Statistica
Interessante Variante, noch nie gesehen!
on 25. March 2014, 09:57 by Richard
RALehrer gave a good advise recently; to write explicitly that a puzzle can be solved without T&E. Of course this puzzles is also solvable without T&E, although there is a tricky step in the beginning. In fact, it could even be the first placement. I have written that step in a hidden comment.
on 25. March 2014, 07:54 by Luigi
Ha!!! Ich hab den versteckten Hinweis gefunden!!!
In Z6/S5 kann nur die 2358 stehen.....
