Please devote 4 hours to the following task.

## Challenge

Create a ping pong bracket which keeps track of who is the current office champion at ping pong.

## Requirements

1. Allow players to register and login
2. Allow a player to view the ping pong bracket rankings in the office
3. Allow a player to log the result of a series of games (time played, score of each game).
4. Allow a player to view their ping pong results history
5. Allow a player to customize their name and password and any other properties

Games are inputted on the honor system.  A game inputted by one player will be said to be correct.

## Games

Games follow standard ping pong rules.  They are games to 21, which need to be won by a two point margin.

## Leaderboard

Please design how the algorithm for how a fair leaderboard should work.  Please feel free to consult any refernece that you like.

Please keep in mind the following factors:

1. Not all wins should count the same. eg. a player ranked 4 beating a player ranked 5 should not count the same as a player ranked 5 beating a player ranked 1.
2. When the leaderboard is first created all the users will be equal in ranking

## App

Please add all necessary models, controllers, gems and tests. The UI is totally up to you.  Feel free to use bootstrap or any other framework.

## Evaluation criteria

We are evaluating you as a backend ruby developer so we are most interested in evaluating the following:

1. Can you complete the assignment as tasked?
2. Can you create a clean architecture?
3. Is your code tested?
4. Can you walk through your code and explain how it works?

Please upload your code to a public repository and send us a link when it is ready. Bonus points if you deploy it to some host (ideally heroku)