evaluation_protocol.md

# Evaluation Protocol

The benchmark is designed for single-turn exam-mode evaluation.

Each item is presented once with:

- German problem text,
- five answer choices `A`--`E`,
- any question image,
- any image-based answer options.

The model must return either one final answer letter or an explicit abstention token such as `Declined`.

Scoring follows the original contest rules:

- correct answer: `+points`,
- wrong answer: `-points / 4`,
- abstention: `0`.

Accuracy treats abstentions as incorrect so that solving performance and abstention policy can be analyzed separately.

Exam-level results should report both raw contest points and normalized percent maximum score:

```text
percent_max = total_points / maximum_possible_points * 100
```

Evaluation should avoid tool use, retrieval, multi-turn correction, or item revisiting unless explicitly reported as a separate protocol.