Non XV sudoku

Place a digit from 1 to 9 into each of the empty squares so that each digit appears exactly once in each of the rows, columns and the nine outlined 3x3 regions.

The digits in two orthogonally adjacent cells cannot have a sum of either 5 or 10.

Sudokus that no one can solve

Sudokus that no one can solve, not only including Sudokus which are very difficult but also those that no one has tried to solve.

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Non XV sudoku

Sudokus that no one can solve