Help shape the future of **Logic Wiz**!  
Vote for the next Sudoku variant we should add:

🔺 **Vertex**  
🔹 **Nabner Lines**  
🇳🇱 **Dutch Flatmates**  
🟢 **Chinese Whispers**

Read the descriptions below and choose your favorite!

## 🗳️ Vote

👉 Our poll on Reddit

or

👉 Send us a support email from the app and mention your favorite variant.

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## 🔺 Vertex (V-Sum)

**Vertex** uses a **V-shaped marker** connecting three cells. The middle cell (vertex) depends on the two end cells. These markers are scattered across the grid.

### Rule:
The **center cell (vertex)** must equal either:

- The **sum** of the two end digits, or
- The **difference** between the two end digits


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## 🔹 Nabner Lines

Digits on a **Nabner Line**:

- Cannot repeat
- Cannot contain consecutive digits

### ✅ Allowed:
- 1, 3, 5, 7, 9
- 2, 4, 6, 8
- 1, 4, 7, 9

### ❌ Not allowed:
- 3 and 4 (consecutive)
- 6 and 7 (consecutive)
- 5 and 5 (repeat)

Long Nabner Lines are especially powerful:
a 5-cell Nabner Line must contain exactly:
**1, 3, 5, 7, 9**

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## 🇳🇱 Dutch Flatmates

A simple rule with surprising depth!

### Rule:

Every **5** in the grid must have:

- A **1 directly above it**, or
- A **9 directly below it**,
- or both.

### Interesting deductions:
- A 5 in the top row must have a 9 below it.
- A 5 in the bottom row must have a 1 above it.


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## 🟢 Chinese Whispers

A powerful line constraint inspired by German Whispers.

### Rule:
Neighboring pairs of digits on the line differ by at most 2.

- If allowed by the puzzle rules, adjacent digits on the line may be identical.



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## ⭐ Which variant should we add next?

Cast your vote and help decide the future of **Logic Wiz**!


Our next variant🔷 Vertex, Nabner, Dutch Flatmates or Chinese Whispers