It's 11
(Published today, 08:31 by gwai77)

Normal sudoku rules apply.
The number next to the arrow outside the Sudoku grid indicates the number to which the cells on the diagonal shown must add up.
Cells a knight's move away must not contain the same digit.
Sudokupad
Solution code: Column 3 from top to bottom
Solved by Dermerlin, L00ping007, jalebc, shenmourencc, Krisonium, Rollo, Qodec, Fisherman, Frankster, jordanza, Dendr, chis_r, olliwright, Nagesh, Crul, abs, Matti64, McMingus, Banana, MB_Cyclist, TaeChi, addie, itsid
Comments
today, 14:37 by chis_r
Very good fun!
today, 11:58 by Qodec
Cool how that clicked together. Thanks!