Pfeil-Sudoku
5
6
7
9
4
6
7
1
2
5
7
5
4
3
7
8
1
4
4
5
8
3
2
6
2
8
5
7
2
5
1
4
3
7
8
9
5
6
Fehler
0/3
Punktzahl
-
Zeit
00:00
Fortschritt0%
Einfach · Pfeil-Sudoku
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Spielanleitung für Arrow Sudoku
Standard-Sudoku-Regeln gelten. Zusätzliche Regel: Die Ziffern entlang des Pfeilschafts müssen zur Ziffer im Kreis an der Pfeilbasis summieren. Der Kreis selbst ist eine normale Sudoku-Zelle – sein Wert bestimmt, wozu die Pfeilzellen summieren müssen.
Vollständiger Leitfaden →
Ziffern auf einem Pfeil müssen sich zur Ziffer im Kreis addieren
Pfeil-Sudoku Einfach
Pfeil-Sudoku Mittel
Pfeil-Sudoku Schwer
Pfeil-Sudoku Experte
Was ist Pfeil-Sudoku?
Arrow Sudoku platziert Pfeile auf dem Gitter, die jeweils von einer eingekreisten Zelle ausgehen. Die Ziffern in allen Zellen entlang des Pfeils (ohne den Kreis) müssen sich zur Ziffer in der eingekreisten Zelle summieren. Da die maximale Ziffer 9 ist, sind lange Pfeile mit vielen Zellen stark eingeschränkt. Arrow Sudoku kombiniert sich oft wunderbar mit Standard-Eliminierungs- und Kandidatenlogik.
Auf einen Blick
| Constraint-Typ | Linienbeschränkungen |
| Typische Vorgaben | 20–26 |
| Schwierigkeitsbewertung | ★★★★☆ 4/5 |
| Durchschn. Lösungszeit — Einfach | 12 Min. |
| Durchschn. Lösungszeit — Mittel | 25 Min. |
| Durchschn. Lösungszeit — Schwer | 50 Min. |
| Durchschn. Lösungszeit — Experte | 80 Min. |
Lösungsanleitung für Pfeil-Sudoku
| Technik | Was es tut | Level |
|---|---|---|
| Arrow Sum Bounding | The circle digit equals the sum of all arrow shaft cells. A 3-cell arrow with circle 5 means the three shaft cells average under 2 — severely constraining options. | Fortgeschritten |
| Max/Min Arrow Analysis | The maximum sum of N cells is 9+8+7+…; the minimum is 1+2+3+…. If the circle digit falls outside these bounds, a constraint error exists. | Fortgeschritten |
| Bifurcation on Short Arrows | For 2-cell arrows with a small circle (e.g., 3), only (1,2) or (2,1) works — enumerate cases to find forced placements quickly. | Fortgeschritten |
| Arrow–Region Interaction | Arrow cells sharing a box or row with the circle create indirect constraints — combine the sum equation with standard Sudoku uniqueness. | Fortgeschritten |
| Repeating Digits on Arrows | Arrow shaft cells can repeat digits (unlike Killer cages). Factor this in when enumerating possible sums. | Fortgeschritten |
Durchschnittliche Lösungszeiten
Einfach
12 Min.
Mittel
25 Min.
Schwer
50 Min.
Experte
80 Min.
Häufig gestellte Fragen
Was ist Arrow Sudoku?
Arrow Sudoku is a variant where arrows are drawn across the grid. Every digit placed along an arrow must sum to the number written inside the circle at the arrow's base. Standard Sudoku rules still apply — every row, column, and 3×3 box must contain the digits 1–9 exactly once.
How do the arrows and circles work?
Each arrow starts at a circle and extends through one or more cells. The digit in the circle is the target sum for all cells the arrow passes through. A single-cell arrow tells you the exact digit in that cell. Longer arrows have multiple possible combinations, which you narrow down using Sudoku constraints.
Is Arrow Sudoku harder than regular Sudoku?
It depends on your experience. Arrow Sudoku adds an arithmetic layer on top of standard logic. Easy puzzles are comparable in difficulty to medium classic Sudoku. Hard and expert arrow puzzles require simultaneous constraint-tracking that most players find significantly more challenging than any classic Sudoku difficulty.
Can a digit repeat along an arrow?
No — digits can repeat on an arrow only if standard Sudoku rules allow it. Because each row, column, and box must contain 1–9 once, a digit can appear twice on an arrow only if the two cells are in different rows, columns, and boxes. In practice, most arrow cells are highly constrained.
What is the best first move in Arrow Sudoku?
Start with single-cell arrows — the digit in that cell equals the circle value directly. Then look for short arrows with extreme sums. A 2-cell arrow summing to 3 can only be {1,2}; summing to 17 can only be {8,9}. These give you the tightest starting constraints without any guessing.
How long does Arrow Sudoku take to solve?
Easy puzzles take 5–15 minutes. Medium puzzles typically run 15–30 minutes. Hard puzzles average 30–60 minutes, and expert puzzles can take over an hour even for experienced solvers. Solve times improve quickly once you develop intuition for which arrow combinations are possible at a glance.