Normal sudoku rules apply.
Each row, column and 3x3 box contains the digits 1 to 9.
Even digits.
The grey squares indicate even digits.
Standard little killer clues apply.
The numbers outside the grid show the sum of the indicated diagonal. Digits might repeat along the diagonal if allowed by the other rules.
Standard anti-knight rules apply.
Cells separated by a chess knight's move cannot contain the same digit.
Try the puzzle on:
F-Puzzles
CTC-App
Solution code: Row 4, Column 9
on 5. August 2021, 21:05 by Godrick
Added CTC-link and extra tags
on 24. July 2021, 00:35 by Zombie Hunter
Some really nice logic in the beginning with tough anti-knight toward the end. Very fun to solve.
(Reply) Thanks. The anti knight at the end became slightly more difficult than intended, but I also liked a lot of it, so left it as it was. Thanks again for playing and nice comment :-) Godrick
on 27. June 2021, 14:02 by Sktx
Great puzzle ! The interactions between the little killer clues and the anti-knight constraint are rich and powerful. Thanks a lot !
(Reply) Thanks a lot to you for your nice comment. Really happy you liked it! Godrick aka Martin :-)