description Renban Sudoku Overview
Renban Sudoku is a variation of the standard Sudoku puzzle that introduces "Renban lines," which are often highlighted in a distinct color. The digits placed along each of these lines must form a set of consecutive, non-repeating integers, though they can be arranged in any order. For example, a line of three cells could contain the digits three, four, and five in any sequence. This mechanic layers mathematical constraints over the traditional rules of filling rows, columns, and boxes.
insights Ranking position
Renban Sudoku ranks #23 of 93 in the Logic Puzzle ranking, behind Numberlink, ahead of Pentominoes Puzzle.
help Renban Sudoku FAQ
What is a Renban line in Sudoku?
A Renban line is a variation rule where the digits placed along the highlighted line must form a set of consecutive, non-repeating integers. For example, a three-cell line could contain 4, 5, and 6 in any order.
Do digits have to be in order on a Renban line?
No, the digits on a Renban line do not have to be placed in ascending or descending order. The only requirement is that the set of numbers on that specific line must be a sequence of consecutive numbers without any repeats.
Do normal Sudoku rules still apply in Renban Sudoku?
Yes, standard Sudoku rules still apply, meaning every row, column, and 3x3 box must contain the digits 1 through 9 exactly once. The Renban lines are an additional constraint layered on top of the classic Sudoku rules.
Where does the term Renban come from?
The term originates from the Japanese word "renban" (連番), which translates to "consecutive numbers" or "serial number." This directly describes the core mathematical mechanic of the puzzle variation.
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