The Howrse Cup, as you may already know, is a game launched by
Howrse on July 24th, 2012. It is a fast-paced game where players
compete on teams, and in Howrse Cup, you and your team are ranked
according to the quantity of diamonds you possess. One way to earn
diamonds is to compete in challenges. You can challenge a player by
clicking on the Breeding tab at the top of the page and the
category beneath it titled "Challenges." Clicking the "Challenge a
player" button, you can challenge any player on Howrse Cup. You
have 24 hours to complete a challenge. To register a horse to
compete against the player that challenged you/you challenged,
simply click on the challenge you wish to register horses for and
search for one suitable to your needs based on its name and skills.
Once you've discovered a horse good enough to be registered for the
challenge, all you have to do is click on the image of the horse,
leading you to the horse's profile. Then, on the right side of the
horse's profile will be an excess tab informing you that you are
registering this horse for a challenge. Within that tab, you may
select how much of that horse's energy you wish to consume for the
challenge. After validating the quantity of energy desired to be
consumed, you're done registering that horse! Don't worry if you
don't have enough horses to be registered; you will have helpers
volunteering their horses to help you in your challenge against a
diverse player. If you triumph in the challenge, your prevail
grants you diamonds.