レンバン数独
4
7
9
8
1
6
3
8
1
5
3
4
7
7
9
8
1
2
6
9
7
2
9
4
1
6
8
5
5
9
9
8
2
3
1
6
4
1
レンバン数独の遊び方
標準数独ルールが適用されます。各紫色の線は、任意の順序の連続した数字のセットを含まなければなりません。線の長さは、必要な連続する数字の数を正確に示します - 例: 4セルの線は3,6,4,5を含む可能性があります。
完全ガイド →
紫色の線は任意の順序で連続した数字を含まなければならない
レンバン数独とは?
Renban Sudoku は、グリッド上に紫色の線を引きます。紫色の線上の数字は、連続した整数の集合を形成しなければなりません(例:3,4,5 や 7,8 など)。ただし、線に沿って任意の順序で現れることができます。線の長さは、正確にいくつの連続した数字が関与しているかを示します。これにより、強力な範囲制限が生まれます。5セルの Renban 線は、可能な範囲 1~9 から5つの連続した値のみを取ることができます。
概要
| 制約タイプ | ライン制約 |
| 典型的な初期数字 | 20–28 |
| 難易度評価 | ★★★★☆ 4/5 |
| 平均解答時間 — 簡単 | 10分 |
| 平均解答時間 — ミディアム | 22分 |
| 平均解答時間 — 難しい | 42分 |
| 平均解答時間 — エキスパート | 72分 |
レンバン数独 の解き方
| テクニック | それが何をするか | レベル |
|---|---|---|
| Length-Based Range | A Renban line of length L must contain L consecutive integers. The starting value is between 1 and 10−L, giving 10−L possible ranges. | 上級 |
| Shared Cell Intersection | If two Renban lines share a cell, that cell's value must fit both lines' consecutive ranges. Intersect the ranges to find valid values. | 上級 |
| Single-Range Reduction | When a Renban line's valid range reduces to a single starting value, all cell values are fully determined (in some order). | 上級 |
| Renban–Box Interaction | Digits on a Renban line within one box restrict the box's remaining cells. Use box uniqueness to narrow the line's range. | 上級 |
平均解答時間
簡単
10分
ミディアム
22分
難しい
42分
エキスパート
72分
よくある質問
Renban Sudokuとは何ですか?
Renban Sudoku is a variant where purple lines are drawn across the grid. Every purple line must contain a set of consecutive digits (in any order along the line). For example, a 4-cell renban line might hold 3,4,5,6 or 6,4,5,3 — any arrangement, as long as the set forms a run of consecutive numbers. Standard Sudoku rules apply.
Do renban digits have to be in order?
No. The digits on a renban line must form a set of consecutive numbers, but they can appear in any order along the line. A 3-cell renban line holds three consecutive digits arranged in any sequence — it's the set that matters, not the sequence.
レンバンライン上で数字は繰り返されますか?
No. Because the digits must form a consecutive set and each digit in a set is unique, no digit can repeat on a renban line. This is an implicit constraint: a 4-cell renban line always contains exactly four distinct consecutive digits.
How do I start solving Renban Sudoku?
Start with the shortest lines and look for lines that share cells with highly constrained rows, columns, or boxes. A 2-cell renban line can only hold adjacent digit pairs (1&2, 2&3, ..., 8&9). Identifying which consecutive set fits each line, then cross-referencing with standard Sudoku constraints, is the core technique.
Is Renban Sudoku harder than regular Sudoku?
Easy and medium renban puzzles are comparable in difficulty to classic Sudoku at the same level. Hard and expert puzzles become significantly harder because you must track which consecutive sets are possible for multiple overlapping lines simultaneously, which requires combinatorial thinking on top of standard Sudoku logic.
How long does Renban Sudoku take to solve?
Easy puzzles take 8–18 minutes. Medium puzzles run 18–35 minutes. Hard puzzles average 35–60 minutes and expert puzzles can take over an hour. Solve time is most affected by the number and length of renban lines — more lines mean more interacting constraints.