Hybrid Sudoku with Renban Groups IV (Double Sudoku, Anti-Knight, Non-Consecutive, Non-Touching)
(Published on 2. February 2011, 13:30 by zhergan)
For each of two 9x9 grids; place the digits 1 to 9 in every row, column and 3x3 standard block. The following three rules must be satisfied for both grids:
*** Cells connected with a chess-knight move could not contain same digits.
*** There exist no neighbouring cells with consecutive digits.
*** Two same numbers can not touch each other diagonally.
Besides grey painted cells form renban groups. These groups must hold consecutive digits, in any order.
Solution code: The marked column, followed by the marked row.
Comments
on 16. August 2021, 00:30 by zhergan
Tags and labels revision..
on 13. June 2012, 17:33 by Oliver Strauß
Zhergan, Thank you for this puzzle which could be solved with only logical thoughts and steps.
on 9. February 2011, 20:12 by dm_litv
Beautiful construction! Really enjoyed, great thanks, Zafer.
on 3. February 2011, 16:12 by miez
Danke auch von mir für die Serie. Hat total Spaß gemacht!
on 3. February 2011, 15:21 by Statistica
Unbelievable. Only with some given digits ((beside the 1s) with ONE '5' and ONE '4'), you are able to find a logical path to solve it. Great construction! Wonderful!
on 3. February 2011, 00:39 by Eisbär
Thanks Zafer for the nice serie of Hybrids... good reading makes these puzzles a lot easier :-)
This last one is a monster!!
on 2. February 2011, 23:34 by julius64
Very nice , Thanks :-)
on 2. February 2011, 18:02 by Rollo
Ganz toll! :-)
on 2. February 2011, 16:54 by ibag
I think it's not necessary to add a further explanation. One valid chess-knight move is enough to inhibit 5 in R2C9. - Nice puzzle! The problems I had first simply were produced by some disability in counting properly. ;-)
on 2. February 2011, 15:55 by zuzanina
@Rollo/Zafer: That's what I thought first, when I read the question, but then it would still leave the grid of Sudoku II to enter the grid of Sudoku I...
@zuzanina: Yes you're right. Actually knight leaves one grid and enters the other grid by this way. But I think this application is clear now. Do you think I had to add a phrase to the text of the puzzle for this? and how we can explain it shortly and clearly.
Zafer
@zafer: I don't think any further explaination is necessary. I wouldn't have thought it possible anyway. I was just comenting Rollos coment... ;-)
on 2. February 2011, 15:01 by Rollo
Surely not. The knight could move over R4C9.
@ibag: Actually Rollo is right. We may say that, this move is done over R4C9 instead of calling it leaving the grid. So thinking this way knight can perform all possible moves with L-shape.
Zafer
on 2. February 2011, 14:43 by ibag
May a chess-knight move leave the grid? I.e. is it allowed to place 5 in R2C9?
@ibag: Yes a chess-knight move may leave one grid. This is the way both grids are related with each other. So it is not allowed to place a 5 in R2C9.
And the same thing is true also for non-touching condition. You can not place a 5 in R3C9 also because of this reason.
Regards,
Zafer
on 2. February 2011, 13:32 by zhergan
It is one step further. I hope you like it...
Zafer
