7 8 9
(Published on 2. December 2025, 21:28 by Lutterot)
Sudoku: Place the digits 1-8 once in each row, column and box.
Killer cages: Digits in a cage do not repeat and sum to the given total.
Arrows: Digits along an arrow sum to the digit in the arrow's circle.
Six is afraid of Seven: Digit 6 is never adjacent to a 7, not even diagonally.
Seven ate Nine: Each 7 is orthogonally adjacent to an empty cell and vice versa.
Link: Play on CtC
Solution code: The digits in row one from left to right as eight characters
Comments
on 18. December 2025, 17:21 by Djirt
Спасибо, что поделись! Это было трудно, отличная тренировка для мозга!
on 7. December 2025, 12:20 by sanky86
Amazing, clever and challenging! Good job
on 5. December 2025, 20:56 by War
4* difficulty in my opinion, great puzzle. I guess the implications of the 789 rule were clear after the first incident of breaking the puzzle. After that the puzzle didn't seem to tricky.
on 4. December 2025, 15:16 by Snookerfan
Excellent! This could be categorized as a zombie-puzzle, because seven also ate my brain. I made a wrong deduction at the start that haunted me for over 2 hours. Very hard from start to finish and a very rewarding solve. Thank you
