アンチコンセクティブ数独
6
4
5
1
3
2
3
8
1
4
6
8
9
7
4
6
2
4
8
9
5
3
7
4
8
4
8
7
9
2
6
1
6
9
8
3
9
7
アンチコンセクティブ数独の遊び方
標準数独ルールが適用されます。追加ルール: 直交隣接するセル（辺を共有）は連続した数字を含んではなりません。セルが5の場合、4つの隣接セルすべてが4と6を避けなければなりません。
完全ガイド →
直交隣接セルは連続した数字を含んではならない
アンチコンセクティブ数独とは？
アンチ連続数独（非連続数独のより厳格な形式）は、直交して隣接する2つのセルが連続した整数を含んではならないというルールを課します。このバリアントは、制約だけで多くの候補ペアを排除するため、しばしばより少ない与えられた数字を必要とします。アンチキングやアンチナイトと組み合わせて、非常に制約の多いパズルを作成することがあります。
概要
| 制約タイプ | アンチ制約 |
| 典型的な初期数字 | 18–24 |
| 難易度評価 | ★★★☆☆ 3/5 |
| 平均解答時間 — 簡単 | 5分 |
| 平均解答時間 — ミディアム | 13分 |
| 平均解答時間 — 難しい | 26分 |
| 平均解答時間 — エキスパート | 48分 |
アンチコンセクティブ数独 の解き方
| テクニック | それが何をするか | レベル |
|---|---|---|
| Global Candidate Pruning | For every filled cell, remove its ±1 neighbours from all orthogonally adjacent cells immediately. | 上級 |
| Digit 5 is Most Constrained | 5 cannot be adjacent to 4 or 6. Use this to restrict placement of 5 across the entire grid. | 上級 |
| Chain Propagation | Placing a digit propagates constraints along rows and columns, often triggering a cascade of forced placements. | 上級 |
| Forbidden Pair Maps | Build a map of forbidden digit pairs for each adjacent pair of cells and use it to eliminate candidates systematically. | 上級 |
平均解答時間
簡単
5分
ミディアム
13分
難しい
26分
エキスパート
48分
よくある質問
Anti-Consecutive Sudokuとは何ですか？
Anti-Consecutive Sudoku is a variant where no two orthogonally adjacent cells (horizontally or vertically neighbouring) may contain consecutive digits. The rule applies everywhere on the grid without any markers. Standard Sudoku rules also apply throughout.
How is Anti-Consecutive different from Non-Consecutive Sudoku?
Anti-Consecutive and Non-Consecutive Sudoku are the same constraint — the name is used interchangeably by different puzzle communities. Both mean: no two horizontally or vertically neighbouring cells may hold digits that differ by exactly 1.
Which digit placements trigger the most eliminations?
Digits in the middle of the range (4, 5, 6) eliminate two consecutive neighbours simultaneously. Placing a 5 removes both 4 and 6 from all four orthogonal neighbours, and placing those 4s and 6s in turn removes 3 and 7 from their neighbours — creating a cascade effect. Starting with central digits often unlocks large portions of the grid.
Is Anti-Consecutive Sudoku accessible for beginners?
What is the best approach to Anti-Consecutive Sudoku?
Treat the anti-consecutive constraint as an additional elimination layer. After every digit placement, immediately update all four orthogonal neighbours to remove ±1 from their candidate lists. The more given digits you have to start with, the more these cascade eliminations interact.
How long does Anti-Consecutive Sudoku take to solve?
Easy puzzles take 5–15 minutes. Medium puzzles run 15–30 minutes. Hard puzzles average 30–55 minutes and expert puzzles can take 60–90 minutes. Expert puzzles with very few given digits rely entirely on the anti-consecutive constraint for deductions.