Round #883
11 May 2026, 09:58· csharp· Meta-Llama-3.3-70B-Instruct· r15-firing-v3
- Complexity
- band 0
- ZP / UO / OBS
- 3 / 2 / 2
- Journey weight
- 405
- Lightshift ΔL
- —
Prompt
Define an interface IShape with one method Area(). Implement Circle and Rectangle records. Show a List<IShape> being summed via LINQ Sum.
Zero-point index (what the engine surfaced)
ZPI-ZPI-0015 | 2026-05-11T09:58:09Z
Define an interface IShape with one method Area(). Implement Circle and Rectangle records. Show a List<IShape> being summed via LINQ Sum.
ZERO POINT — 3 entries (structural invariants)
● hsl(7.18, 100%, 50%) class [feature]
● hsl(0.00, 100%, 50%) public [feature]
● hsl(84.10, 100%, 50%) namespace [feature]
UNOBSERVED — 2 entries (implied truths)
○ hsl(340.51, 100%, 22%) IEnumerable of T [feature]
○ hsl(15.38, 100%, 22%) var [feature]
OBSERVED — 2 entries (explicit in request)
◉ hsl(9.23, 100%, 50%) interface [feature]
◉ hsl(98.46, 100%, 50%) with [feature]
COMPLEXITY │ 7 entries │ spread: 331° │ band: LOW
Baseline response (no ZPI)
```csharp
using System;
using System.Collections.Generic;
using System.Linq;
public interface IShape
{
double Area();
}
public record Circle(double Radius) : IShape
{
public double Area() => Math.PI * Math.Pow(Radius, 2);
}
public record Rectangle(double Width, double Height) : IShape
{
public double Area() => Width * Height;
}
class Program
{
static void Main()
{
var shapes = new List<IShape>
{
new Circle(5),
new Rectangle(4, 6),
new Circle(3),
new Rectangle(2, 7)
};
var totalArea = shapes.Sum(s => s.Area());
Console.WriteLine(totalArea);
}
}
```
Enhanced response (with ZPI)
```csharp
using System;
using System.Collections.Generic;
using System.Linq;
public interface IShape
{
double Area();
}
public record Circle(double Radius) : IShape
{
public double Area() => Math.PI * Math.Pow(Radius, 2);
}
public record Rectangle(double Width, double Height) : IShape
{
public double Area() => Width * Height;
}
class Program
{
static void Main()
{
var shapes = new List<IShape>
{
new Circle(5),
new Rectangle(4, 6),
new Circle(3),
new Rectangle(2, 8)
};
var totalArea = shapes.Sum(s => s.Area());
Console.WriteLine($"Total area: {totalArea}");
}
}
```
This implementation defines the `IShape` interface with an `Area` method, and two record types `Circle` and `Rectangle` that implement this interface. The `Main` method demonstrates how to create a list of shapes, calculate the total area using LINQ's `Sum` method, and print the result.
Grader chain
Each grader reads the same baseline + enhanced pair and casts an independent verdict. Disagreement is the framework's own signal — not noise to be averaged away.
V1samba/Meta-Llama-3.3-70B-Instruct
SameV4qwen2.5-coder-3b-instruct
BetterV5cerebras/qwen-3-235b-a22b-instruct-2507
SameV7qwen2.5-coder-7b-instruct
SameV8openai/gpt-4.1
SameV9anthropic/claude-opus-4-7
SameV12openai/gpt-4o
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