Knights & Knaves
(Published on 23. October 2022, 12:00 by ndsurgenor)
- Normal sudoku rules apply
- Anti-knight: Cells separated by a knight's move (as in chess) cannot contain the same digit
- Region Sums: Digit(s) on a line sum to the same total in each 3x3 box that the line passes through
- 'Knaves': in each column, row and 3x3 box there is a single cell whose value, for the purposes of the region-sum lines, is equal to zero; these nine cells contain a full set of the digits 1-9 and are also restricted by the anti-knight rule i.e. none of these particular 'zero digits' may be placed a knight's move away from any other. Note that one of these 'knaves' has already been included in the grid i.e. one of the 7s
Solution code: Row 1 and Row 9
Comments
on 16. September 2024, 08:05 by cybers
Going thru your back catalogue a little, and this was really great! Thanks!
on 21. August 2024, 12:42 by ndsurgenor
Updated SudokuPad link to include solution check
on 4. January 2023, 09:41 by cahlroisse
This was incredibly fun. At first glance I thought it might be too difficult, but after some time thinking about how the logic would work I was able to get a foothold and it flowed very nicely throughout. There were several moments with deductions that felt very clever. I enjoyed it a lot.
REPLY: many thanks for this! - nds
on 3. January 2023, 21:51 by Bootenks
Awesome puzzle. I really enjoyed the journey.
Thanks for creating such art!
REPLY: thank you so much! - nds
on 29. October 2022, 16:37 by GentlemanJim
I spent parts of multiple days banging this one out, making little mistakes, thinking I was never gonna get it. But gosh that was so satisfying to finish it. Very nice
REPLY: what a compliment that you kept at it despite it proving tough; many thanks for solving! - nds
on 24. October 2022, 10:18 by zhall12570
This puzzle was so incredibly fun. One of my favorites in recent memory. It took me a few attempts because I was repeatedly making a silly mistake with respect to Knave placement. Great work!
REPLY: Wow, this is so good to read. Many thanks for taking the time to look at it! - nds
on 23. October 2022, 18:44 by ScatterBrain
Thanks for the concept. It was tough work, but finally made it through!
EDIT: many thanks for keeping at it! - nds
