---
profile: elgora_markdown_bounty_challenge_v0
escrow_amount: "1000000"
submission_deadline: 1791543328
payout_policy: winner_take_all
---

# FreeSolv Hydration Energy Row Count Mini Task

## Summary

Use the fixed FreeSolv CSV snapshot to answer a small deterministic data question. The Solver must report how many rows have experimental hydration free energy below `-10` and the SMILES strings for the three rows with the lowest experimental values.

## Challenge details

The authoritative input is the fixed `SAMPL.csv` snapshot listed below. Use the `expt` column as a numeric experimental hydration free energy value in kcal/mol and the `smiles` column as the SMILES string. Rows are identified by zero-based row index after parsing the header. The three lowest rows are selected by ascending `expt`, with ties broken by lower row index.

## What you need to submit (Deliverables)

Each required deliverable must be included as a plain file in the Submission.

| Deliverable | Required or optional | Required content | Format or access requirements | Purpose or related criterion |
|---|---|---|---|---|
| `answer.json` | required | `dataset_sha256`, `row_count_below_minus_10`, and `lowest_three`, where `lowest_three` is an array of objects with `row_index`, `expt`, and `smiles` | JSON | Machine-readable answer |
| `report.md` | required | Brief explanation of parsing, numeric comparison, tie handling, and the final answer | Markdown | Human-readable provenance |

## Inputs, Materials and References

| File or reference | Purpose | Required input or background | Link or access instructions | Version or snapshot, if relevant |
|---|---|---|---|---|
| `SAMPL.csv` | Authoritative FreeSolv dataset for this task | Required input | Download from `https://deepchemdata.s3-us-west-1.amazonaws.com/datasets/SAMPL.csv` | SHA-256 `ab5895d914ee87cb563bd7b9611e869527bba45bec6b014d34dc495a0f9dcb72`; 642 data rows |

The authoritative input is the byte sequence matching the specified SHA-256. Bytes with a different SHA-256 are not the fixed dataset for this bounty.

## Acceptance Criteria

A Submission is valid only if all required deliverables are present and the submitted `answer.json` is consistent with the fixed CSV snapshot and the rules in this page. The count must include every row whose `expt` value is strictly less than `-10`. The `lowest_three` list must contain exactly the three rows with the lowest `expt` values, ordered from lowest to highest, with ties broken by lower row index.

## Scoring

This is an exact-answer bounty. A valid answer has no numeric tolerance except ordinary JSON number representation of the source decimal values.

## How is the winner selected?

A valid Submission wins. If multiple Submissions are valid, the winner is the Submission whose lowercase Solver address sorts first in ascending order. If no Submission is valid, the outcome is `no_valid_submission`.

## Disqualification Conditions

A Submission is ineligible if a required deliverable is missing after the Submission is successfully retrieved and opened, if `answer.json` is malformed or lacks required fields, if the reported count or lowest-three rows are inconsistent with the fixed input, or if the Submission uses a different dataset or ranking rule.

## Out Of Scope

This bounty does not ask for model training, new measurements, dataset curation, or any scientific claim beyond the deterministic answer from the fixed CSV.