Unlucky Killers
(Published on 9. May 2023, 03:02 by bodemeister)
Rules:
- Normal Sudoku Rules Apply.
- Dashed rectangles are killer cages. Digits in a killer cage must sum to the number in the top left corner of the cage (if given).
- Killer Indexing: Digits in killer cages also reference the position of a digit in it's corresponding row and column. If cell RxCy is in a killer cage and contains digit k, then cell RxCk contains digit y and cell RkCy contains digit x.
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Example: The image on the right is an example of the Killer Indexing rule, showing the digits in blue that must be placed as a result of the given killer cage digits. Digit 5 in R4C2 says that 5 is the position of digit 2 in row 4 and that 5 is the position of digit 4 in column 2. |
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Below is the main puzzle. It is also available at F-Puzzles and CTC-App
Solution code: Row 1
Comments
on 11. May 2024, 13:17 by The Book Wyrm
Fun puzzle!
More neat interactions with the indexing - some pretty interesting stuff comes from having the cells be both row and column indexing.
Not too difficult either.
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Yeah it's not hard. I think the only reason it is rated 4-star is solvers who have not experienced the indexing rule before.
on 13. May 2023, 03:04 by billybobo445
Fun solve!
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Happy to hear. Thanks!
on 12. May 2023, 22:45 by VitP
scary hard until you can wrap your head around the indexing.
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Yeah the puzzle does require a specific approach. Parity is important. Low=1-3, Middle=4-6, and High=7-9. Two adjacent killer cells in the same 3x3 box must have different parity, otherwise the common digit they index would appear twice in a 3x3 box, resulting in a contradiction.
on 9. May 2023, 12:15 by MonsieurTRISTE
A dance between rows and columns.
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Yes lots of row/column interactions. Thank you for solving my puzzle!
on 9. May 2023, 08:48 by tryote
Very nice!!!
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Thanks! Glad you enjoyed the puzzle.
