Standard sudoku rules apply.
Clues outside the grid indicate the sum of digits sandwiched between the 1 and 9 in the respective row/column.
All adjacent cells that sum to 5 or 10 have been marked with, respectively, a V or X in between.
Solve on f-puzzles
Solution code: Row 1, Row 9
on 28. July 2021, 17:41 by Mark Sweep
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