Sudoku Constraints can wear multiple masks.
BremSter solves "13191319" by Riffclown.
This Duality Sudoku uses the Little Killer and X-Sums constraints.
Solve in Sven's SudokuPad WebApp: https://sudokupad.app/xj54c31muh
This puzzle was published on Logic Masters Germany: https://logic-masters.de/Raetselportal/Raetsel/zeigen.php?id=000KHO
š Puzzle Rules:
⢠Normal Sudoku rules apply. Place the digits 1-9 in each row, column and box without repetition.
⢠Duality: External clues are both normal X-Sum and Little Killer clues in both directions
⢠Little Killer: Clues outside the grid with an arrow are the sum of the digits in the cells along the indicated diagonal. Digits may repeat along these diagonals if allowed by other rules.
⢠X-Sums: A number outside the grid gives the sum of the first N digits in that row or column, where N is the digit in the cell closest to the given clue.
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