Cross Sums Sudoku (820)

Instruction:

Apply classic sudoku rules. There are four cells marked by a cross several times in the grid. Both diagonal pairs in them have the same sum. All crosses are marked.

Reference: WPF (1)

Notes:

Variants:
- Not all crosses are marked.

Examples:

WPF Sudoku GP 2025 - Round 5 (226)

Parent puzzle:
Mathrax Sudoku

Related puzzles:
Neighbor Sums Sudoku