Pijl 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
Fouten
0/3
Score
-
Tijd
00:00
Voortgang0%
Gemakkelijk ยท Pijl Sudoku
Wissel moeilijkheidsgraad hierboven โ
Hoe Arrow Sudoku te spelen
Standaard Sudoku-regels zijn van toepassing. Extra regel: de cijfers langs de staart van elke pijl moeten optellen tot het cijfer in de cirkel aan de basis van de pijl. De cirkel zelf is een normale Sudoku-cel โ de waarde bepaalt waar de pijlcellen aan moeten voldoen.
Volledige gids โ
Digits op een arrow moeten optellen tot de digit in de circle
Pijl Sudoku Gemakkelijk
Pijl Sudoku Gemiddeld
Pijl Sudoku Moeilijk
Pijl Sudoku Expert
Wat is Pijl Sudoku?
Arrow Sudoku plaatst pijlen op het rooster, elk beginnend vanuit een omcirkelde cel. De cijfers in alle cellen langs de pijl (exclusief de cirkel) moeten optellen tot het cijfer in de omcirkelde cel. Aangezien het maximale cijfer 9 is, zijn lange pijlen met veel cellen sterk beperkt. Arrow Sudoku combineert vaak prachtig met standaard eliminatie- en kandidaatlogica.
In รฉรฉn oogopslag
| Beperkingstype | Lijnbeperkingen |
| Typische gegeven cijfers | 20โ26 |
| Moeilijkheidsbeoordeling | โ โ โ โ โ 4/5 |
| Gem. oplossingstijd โ Gemakkelijk | 12 min |
| Gem. oplossingstijd โ Gemiddeld | 25 min |
| Gem. oplossingstijd โ Moeilijk | 50 min |
| Gem. oplossingstijd โ Expert | 80 min |
Hoe Pijl Sudoku op te lossen
| Techniek | Wat het doet | Niveau |
|---|---|---|
| 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 โ severely constraining options. | Beginner |
| Max/Min Arrow Analysis | The maximum sum of N cells is 9+8+7+โฆ; the minimum is 1+2+3+โฆ. If the circle digit falls outside these bounds, a constraint error exists. | Gevorderd |
| Bifurcation on Short Arrows | For 2-cell arrows with a small circle (e.g., 3), only (1,2) or (2,1) works โ enumerate cases to find forced placements quickly. | Beginner |
| ArrowโRegion Interaction | Arrow cells sharing a box or row with the circle create indirect constraints โ combine the sum equation with standard Sudoku uniqueness. | Gevorderd |
| Repeating Digits on Arrows | Arrow shaft cells can repeat digits (unlike Killer cages). Factor this in when enumerating possible sums. | Gevorderd |
Gemiddelde Oplossingstijden
Gemakkelijk
12 min
Gemiddeld
25 min
Moeilijk
50 min
Expert
80 min
Veelgestelde Vragen
Wat is 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 โ every row, column, and 3ร3 box must contain the digits 1โ9 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 โ digits can repeat on an arrow only if standard Sudoku rules allow it. Because each row, column, and box must contain 1โ9 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 โ 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 5โ15 minutes. Medium puzzles typically run 15โ30 minutes. Hard puzzles average 30โ60 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.