Normal sudoku rules apply.
All red cells are both Row Indexers and Column Indexers.
Row Indexer: A marked cell in row X indicates the row in which the digit X appears in the same column.
Column Indexer: A marked cell in column X indicates the column in which the digit X appears in the same row.
XV: digits separated by an X must sum to 10
All the X's interecating with the indexers are given.
Solve online here: SudokuPad Puzzle
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