Target

Standard sudoku rules apply: each row, column, and 3x3 box must contain all the digits from 1 to 9.

Anti-knight: digits separated by a chess knight's move must be different.

Diagonals: digits must not repeat along a marked diagonal.

XV: digits separated by an X must sum to 10; digits separated by a V must sum to 5.

Cages: digits in a cage must sum to the value in the top left corner of the cage.