Add new practice exercise: killer-sudoku-helper

[andrerfcsantos]

Getting Started

This task requires the implementation of a new practice exercise. If you have not yet contributed to concept exercises before, this task requires some upfront reading to acquire the necessary background knowledge.

Here you can read about what Concept Exercises are and how they are structured:

• What are Practice Exercises?
• Anatomy of a Practice Exercise

Also, be aware of these general guidelines:

• Exercism Markdown Specification
• Exercism Formatting and Style Guide

Problem Specifications

The description and test cases for all practice exercises are taken from the problem specifications repository.

• Problem specifications PR - This is the PR in problem specifications that created this exercise. Use it to read more about the decisions taken about the exercise.
• Problem specifications exercise directory - This folder contains the description and test cases you must have for the exercise.

For more information on how to use the information from problem specifications when building the exercise, check Anatomy of a Practice Exercise.

How to proceed

1. First accept this issue by saying "I'd like to work on this". After posting that, feel free to start working on the issue right away. A maintainer will later assign put you as an assignee on the issue, but you don't have to wait for that to work on the issue.
2. Use this issue to discuss any questions you have, what should be included in the content and shouldn't, and to collect more reference material.
3. Create a PR and set "exercism/go" as reviewers. Additionally, you can write in #maintaining-go on Slack that your PR is ready for review. Once you incorporated any critical feedback that the reviewer might give you and the PR is approved, it will be merged by a maintainer.

[CODETOSPACE]

"I'd like to work on this"

[keiravillekode]

@CODETOSPACE - Are you still working on this?