Visiting The Actress
(Published on 29. May 2025, 19:58 by ThePedallingPianist)
Antiking sudoku: Place a digit from 1-8 in every cell such that a digit does not appear twice in a row, column, box or 2x2 area.
Proof Game in 5.0:
• The diagram shows a Chess game after 5.0 moves (5 white moves and 5 black moves);
• Draw lines representing each move that has been made up to this point;
⟶ All lines are straight except any representing a knight's move, which is a single line that moves two orthogonal steps in one direction followed by one step in a perpendicular direction;
⟶ All lines are considered distinct from each other, even if they share cells with other lines;
• Odd-numbered moves (i.e. each player's 1st, 3rd and 5th moves) are represented by Region Sums Lines;
⟶ Box borders divide a Region Sums Line into segments, whose digits have the same sum;
• Even-numbered moves are represented by Renban Lines;
⟶ Digits on a Renban Line form a non-repeating consecutive set.
Kropki:
• Digits separated by a black dot are in a 1:2 ratio;
• Digits separated by a white dot are consecutive.
Rules of chess
The below example shows a possible position after four moves (written below in English algebraic notation, and how lines would subsequently be drawn (blue is Region Sums, pink is Renban):
1. d4, nc6
2. Kd2, nxd4
3. Kc3, nf5
4. Nd2, ng3
Solution code: Digits on the last line that was drawn (representing the last black move), reading cells in the direction of the move
Comments
on 5. June 2025, 19:21 by Klausku
Chess is anything but unfamiliar to me, but this position drove me almost mad. Everything I tried had one half-move less or to much. After sometime I had this crazy idea, and it worked. The sudoku part was not easy, but doable except when I got stuck in mid-solve because I had forgotten about the kings-move rule. Brilliant puzzle. Thanks!
on 2. June 2025, 01:00 by mse326
Think I got a bit lucky on this. It only took me about 40 minutes but I didn't have any good process on how to find the chess moves. I sort of lucked into finding it pretty quickly. I can easilly see another day me spending an hour+ just to find that.
on 1. June 2025, 22:31 by ViKingPrime
You've come so far from that bright-eyed lad who first set out setting hanged men into the grid... literally upping your game.
This is incredible. The way you're progressing as a setter, I fully expect you to transcend from this mortal plane any day now.
on 1. June 2025, 14:46 by OrestisLomis
I love retrograde chess puzzles and the need for sudoku was a nice twist! Looking forward to a future puzzle with perhaps even more of a back and forth (as long as it doesn't become impossibly hard).
For some reason after finding the chess moves fairly quickly I got really really stuck on the sudoku. I couldn't find any digits as I was sitting in the park until I later got home and started solving on my laptop. Doesn't take away from an amazingly well set puzzle though!
on 31. May 2025, 22:04 by siron2133
Very Fun puzzle! Reminded of 'Ein echtes Schachsudoku' by CJK in some ways. I enjoy chess puzzles and it was a pretty cool brain teaser figuring out what the moves were that lead to the position, not as simple as I initially thought it would be. The sudoku portion was significantly easier but still enjoyable nonetheless.
Would love to see more puzzles of this kind!
on 31. May 2025, 20:01 by ThePedallingPianist
Version added with reduced aesthetics
on 31. May 2025, 15:21 by MathGuy_12
Awesome puzzle! Really enjoyed the chess portion and how you made it a unique position. I would say the sudoku was much easier than the chess, but it still had some really fun deductions. It is extremely impressive to create both a creatively unique chess position and a fun and interesting sudoku within one puzzle!
My only request would be to include a sudoku pad link without the chess cosmetics, you cannot see any colored cells on the chess board one.
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TPP: Thank you for the kind comment! You make a very good point, I've just made another version :)
on 30. May 2025, 14:58 by Basil
Interesting idea. It would have been nice if the moves made more sense from a chess perspective.
on 30. May 2025, 13:22 by ThePedallingPianist
Reworded solution code and revised difficulty
on 29. May 2025, 22:09 by ralphwaldo1
Thanks for this!
on 29. May 2025, 21:43 by ralphwaldo1
Thanks for this!
