Cross Purposes (Quad Sums Killer Anti-King)
(Published on 6. June 2022, 02:42 by tallcat)
Normal Sudoku rules apply
Quad Sums: For each set of four cells touched by the same circle, the sum of three of the cells must equal the fourth cell. Not all circles have been given.
Anti-King: Cells a king's move apart in chess may not contain the same digit.
Killer: Digits in cages must sum to the given total.
Can be played online at f-puzzles or CTC
Solution code: Row 2 (left to right) followed by column 8 (top to bottom). 18 digits, no spaces.
Comments
on 3. February 2026, 22:53 by Piatato
Cool!
on 21. December 2025, 08:20 by mezkur7
https://sudokupad.app/iwlp08x2w1
on 27. August 2023, 00:03 by Christounet
Cool break-in, with clever interactions between the very sparse clues in the grid. Thanks !
on 22. June 2022, 18:52 by Niverio
Wonderful! Such an elegant break-in!
on 12. June 2022, 19:17 by ocaly
What a great break-in and loved the logic!
Very nice :)
(note to myself: solved it two days ago around this time but forgot to fill in the solution code)
on 10. June 2022, 00:34 by peacherwu2
Enjoyed every minute. Brilliant idea!
on 9. June 2022, 18:13 by Playmaker6174
Absolutely fabulous puzzle, from the beautiful opening sequence to the nice interactions later on, that quad sum in box 1 is really funky there :)
on 8. June 2022, 13:51 by kolot
Very nice puzzle!
on 8. June 2022, 09:17 by abed hawila
Superb puzzle!
on 7. June 2022, 02:03 by Andrewsarchus
Beautiful break-in!
on 6. June 2022, 20:44 by udukos
Great puzzle with a cool entry. Thanks, tallcat!
on 6. June 2022, 06:13 by Elliott810
Beautiful construction! Thanks:)
