Irregular Diagonal Sudoku
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Lehké · Nepravidelné Diagonální Sudoku
Přepni obtížnost výše ↑
Jak hrát Irregular Diagonal Sudoku
Každý řádek, sloupec, barevná oblast a obě hlavní diagonály (označeny oranžově) musí obsahovat každé z čísel 1–9 přesně jednou. Oblasti nahrazují standardní 3×3 bloky.
Kompletní průvodce →
Kombinuje jigsaw oblasti s hlavními diagonálními omezeními
Irregular Diagonal Sudoku Lehký
Irregular Diagonal Sudoku Střední
Irregular Diagonal Sudoku Těžké
Irregular Diagonal Sudoku Expert
Co je Irregular Diagonal Sudoku?
Irregular Diagonal Sudoku kombinuje dva variantní typy: nepravidelné jigsaw regiony Jigsaw Sudoku a diagonálová omezení Diagonal Sudoku. Obě hlavní diagonály a všechny nepravidelné regiony musí obsahovat 1–9. Kombinace tvoří vysoce omezené puzzle s unikální řešicí logikou.
Na Prvý Pohled
| Typ omezení | Combined: Irregular + Diagonal |
| Typické zadane | 22–30 |
| Ocena obtížnosti | ★★★★☆ 4/5 |
| Prům. čas řešení — Lehký | 8 min |
| Prům. čas řešení — Střední | 18 min |
| Prům. čas řešení — Těžké | 35 min |
| Prům. čas řešení — Expert | 65 min |
Jak řešit Irregular Diagonal Sudoku
| Technika | Co to dělá | Úroveň |
|---|---|---|
| Map All 29 Units First | You have 9 rows + 9 columns + 9 irregular regions + 2 diagonals = 29 constraint units. Identify all irregular regions and both diagonals before starting. | Pokročilý |
| Diagonal–Region Intersection | Cells on a diagonal that also sit in the same irregular region create a powerful two-unit intersection — use both constraints simultaneously. | Pokročilý |
| Diagonal Pointing Pairs | If a digit on a diagonal is confined to one irregular region, eliminate it from all other cells of that region. | Pokročilý |
| Region Coloring for Diagonals | Trace which irregular regions each diagonal passes through. Regions with many diagonal cells are the most constrained. | Pokročilý |
| Chain Deduction Across Units | With 29 units, a forced digit in one unit often cascades through 3–4 other units. Track chains carefully to avoid errors. | Pokročilý |
Průměrné Časy Řešení
Lehký
8 min
Střední
18 min
Těžké
35 min
Expert
65 min
Často zadávané otázky
Co je Irregular Diagonal Sudoku?
Irregular Diagonal Sudoku combines two variants: irregular jigsaw-shaped regions replace the standard 3×3 boxes, and both main diagonals of the 9×9 grid must each contain 1–9 exactly once. Cells on a diagonal therefore belong to four groups: row, column, jigsaw region, and diagonal. It is one of the most constraint-dense variants available.
How many constraint groups does a diagonal cell belong to?
A cell on one of the main diagonals belongs to four groups simultaneously: its row, its column, its jigsaw region, and its diagonal. The centre cell belongs to five groups — both diagonals, plus row, column, and region. This extreme constraint density makes every placement very powerful.
Is Irregular Diagonal Sudoku the hardest variant?
It is among the most constrained variants. The combination of irregular regions and diagonal constraints means almost every cell interacts with an unusually large portion of the grid. Expert puzzles in this variant are among the most demanding logic puzzles on the site.
What order should I tackle the constraints?
Start with the diagonals, since diagonal cells carry the most constraints. Find hidden singles on each diagonal first. Then scan the jigsaw regions, keeping diagonal eliminations active. Update all four constraint groups — row, column, region, diagonal — after every single placement.
Can I use standard Sudoku techniques?
Yes — all standard techniques apply. You simply treat each diagonal as an additional house alongside the nine rows, nine columns, and nine jigsaw regions. The diagonal pointing pair (where a digit in a diagonal is confined to one row or column) is a particularly powerful technique unique to diagonal variants.
How long does Irregular Diagonal Sudoku take to solve?
Easy puzzles take 10–20 minutes. Medium puzzles run 20–40 minutes. Hard puzzles average 40–75 minutes and expert puzzles often exceed 90 minutes. The combined constraint density means that even easy puzzles require tracking four constraint groups simultaneously.