Medieval Upheaval 4
(Published on 24. June 2024, 08:00 by Nordy)
The fourth puzzle in the Chess Sums series. I recommend solving Medieval Upheaval 3 first, but feel free to dive right in. This puzzle felt worthy of holding the honor as my 100th published puzzle—I hope you agree!
Rules:
Chaos Construction: Divide the grid into regions, each consisting of nine orthogonally-connected cells. Every row, column, and region must contain the digits 1 to 9 once each.
Renbans: Digits along a pink line form a non-repeating consecutive set, but may be written in any order.
Chess Sums: A cell with a number in its top-left corner is a Chess Sums cell. The number in the top-left corner indicates the amount of Chess Sums satisfied by the digit in that cell. A digit in a Chess Sums cell gives one or more of the following:
- The sum of all digits that share its region and are a king's move away
- The sum of all digits that share its region and are a knight's move away
- The sum of all digits that share its region and are a bishop's move away
For a description of how each chess piece moves, see the "Moves" section of this Wikipedia article.
Clarifications:
- Bishops can "see" past cells from other regions—cells from other regions do not block a bishop's vision.
- Each Chess Sum is calculated separately. For example, a cell with a "2" clue that contains a 7 can see 4 and 3 by king's move, and can see 5 and 2 by knight's move—the king's move digits and the knight's move digits each sum to 7 separately.
Example:
Here is an example of the Chess Sums rules. Note that the pink 9 sees through the blue region.
Solve Online:
Solution code: Row 8 with dashes for region borders (ex: 35-2187-96-4)
Comments
on 21. September 2024, 14:49 by Nairurian
The first 5* for me, it took me over 4 hours but I did get there in the end.
on 14. September 2024, 01:52 by Ragna
Thank you Simon! This was too hard for me. I dont understood the rules. :-(
on 14. September 2024, 00:13 by LeaVulpina
I lost count of the number of times I almost gave up. I'm so glad I didn't! Because as brutally difficult as I found that, it was 141 minutes of complete beauty. Amazing puzzle!
on 16. July 2024, 23:56 by wuc
Oh yeah what a mind bender. Hardest of the series to me too. Masterpiece. Thx.
on 29. June 2024, 15:11 by ONeill
Tough but fun, thank you
on 28. June 2024, 18:44 by wenchang
Extremely hard while it is very joyful to solve. Spoiler alert! https://youtu.be/vxG9LfXeHkg
on 28. June 2024, 11:57 by Piatato
Superb puzzle!
on 28. June 2024, 07:02 by peacherwu2
What's the meaning of clue 1, I can't follow...
—A “1” means the digit in that cell satisfies *one* of the three possible Chess Sums. In the example, the pink 8 satisfies a *king* sum (it sees 2+1+5 by king’s move), and the green 9 satisfies a *knight* sum (it sees 2+7 by knight’s move). A “2” means the digit in that cell satisfies *two* of the Chess Sums. In the example, the pink 6 sees 4+2 by king’s move and 2+1+3 by bishop’s move. A “3” means the digit in that cell satisfies all *three* Chess Sums.
on 27. June 2024, 07:49 by KNT
great cc!! thanks a lot
on 27. June 2024, 06:32 by yttrio
Phenomenal puzzle, and definitely a worthy addition to the series! It definitely took a while to fully comprehend the consequences of the rules, but other than some really silly blindness on my part, the deductions actually flowed surprisingly well!
on 25. June 2024, 23:24 by Christounet
Clearly the hardest of the serie !
Maybe the nicest too ? Not sure, they're all awesome. I hope there's more ! Thanks :)
on 25. June 2024, 18:25 by mathpesto
Wow, such a brilliant puzzle! So many fascinating steps, hard to pick a favorite. Highly recommend this one!
on 25. June 2024, 12:32 by marcmees
Definitely worth a jubilee puzzle. Thanks for so many nice entries.
on 25. June 2024, 05:54 by Gnosis66
Quite an inventive and enjoyable puzzle.
on 24. June 2024, 23:18 by sanabas
Amazing puzzle.
on 24. June 2024, 19:18 by andreatetta
Nice and easy, it only took 2 and a half hours :'D
Great puzzle.
on 24. June 2024, 11:49 by Snookerfan
Brilliant puzzle and series! Thank you
